摘要：
Enhancing the stability and durability of superhydrophobic wood remains a significant challenge for its long-term application in various fields. This study presents a novel approach to developing durable superhydrophobic wood by regulating wood structure. The analyses of the mechanism revealed that Si-Ti@PDMS prepolymer infiltrated wood’s pores and cell walls, forming a highly cross-linked micro-nanoscale superhydrophobic coating extending from the exterior to the interior. The resulting superhydrophobic wood exhibited excellent hydrophobic characteristics on both its surface and various cutting surfaces. Furthermore, the water contact angles (WCA) measured on the various cut surfaces of the wood consistently exceeded 150°, thereby confirming its superhydrophobicity. Additionally, the water contact angles (WCA) at wood depth surfaces remained above 130°. This observation indicates that the non-wettability characteristic of the superhydrophobic wood extends from the surface to the interior. Consequently, even in the event of surface structural damage, the wood retains its robust hydrophobic performance. This study provides a theoretical foundation for regulating durable superhydrophobic wood, and it was beneficial to the efficient use of superhydrophobic wood in construction and furniture fields.
Enhancing the stability and durability of superhydrophobic wood remains a significant challenge for its long-term application in various fields. This study presents a novel approach to developing durable superhydrophobic wood by regulating wood structure. The analyses of the mechanism revealed that Si-Ti@PDMS prepolymer infiltrated wood’s pores and cell walls, forming a highly cross-linked micro-nanoscale superhydrophobic coating extending from the exterior to the interior. The resulting superhydrophobic wood exhibited excellent hydrophobic characteristics on both its surface and various cutting surfaces. Furthermore, the water contact angles (WCA) measured on the various cut surfaces of the wood consistently exceeded 150°, thereby confirming its superhydrophobicity. Additionally, the water contact angles (WCA) at wood depth surfaces remained above 130°. This observation indicates that the non-wettability characteristic of the superhydrophobic wood extends from the surface to the interior. Consequently, even in the event of surface structural damage, the wood retains its robust hydrophobic performance. This study provides a theoretical foundation for regulating durable superhydrophobic wood, and it was beneficial to the efficient use of superhydrophobic wood in construction and furniture fields.
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects,2025年:137250 ISSN：0927-7757
通讯作者：
Han Xu<&wdkj&>Yan Qing
作者机构：
[Yuxin Zhong; Jiahao Pi; Sha Chen; Pengcheng Liao; Yuanyuan Liao] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China;State Key Laboratory of Utilization of Woody Oil Resource, Central South University of Forestry and Technology, Changsha 410004, PR China;[Jianbin Zeng] Hunan Aerospace TianLu advanced material testing Co., Ltd, Changsha 410004, PR China;[Han Xu; Yan Qing; Yiqiang Wu] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China<&wdkj&>State Key Laboratory of Utilization of Woody Oil Resource, Central South University of Forestry and Technology, Changsha 410004, PR China
通讯机构：
[Han Xu; Yan Qing] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China<&wdkj&>State Key Laboratory of Utilization of Woody Oil Resource, Central South University of Forestry and Technology, Changsha 410004, PR China
摘要：
Manganese-based oxides, regarded as potential cathode materials for aqueous zinc-ion batteries (AZIBs), face significant challenges in their development and application, primarily due to their low electrical conductivity and inadequate electrochemical activity. Incorporating carbon as a substrate material represents a promising approach for enhancing the conductivity. Herein, bimetallic organic framework precursors were synthesized by hydrothermal method, with wood fibers serving as the carrier. The resulting carbonized wood fibers-supported carbon-coated MnO(MnO@C/CWF) was obtained through high-temperature calcination of the precursors. The carbon coating with a porous structure enhances the conductivity and accelerates the ion transport kinetics of manganese-based oxides but also improves their surface adsorption capacity and structural stability. Consequently, the specific capacity of MnO@C/CWF was 307 mAh g -1 at a current density of 0.2 A g -1 . Furthermore, MnO@C/CWF demonstrates long cycling stability, retaining 82% of its initial capacity after 10,000 cycles at 2 A g -1 . This work presents a strategy to enhance the electrochemical performance of MnO and advances the use of biomass-derived carbon fiber materials in aqueous zinc-ion batteries.
Manganese-based oxides, regarded as potential cathode materials for aqueous zinc-ion batteries (AZIBs), face significant challenges in their development and application, primarily due to their low electrical conductivity and inadequate electrochemical activity. Incorporating carbon as a substrate material represents a promising approach for enhancing the conductivity. Herein, bimetallic organic framework precursors were synthesized by hydrothermal method, with wood fibers serving as the carrier. The resulting carbonized wood fibers-supported carbon-coated MnO(MnO@C/CWF) was obtained through high-temperature calcination of the precursors. The carbon coating with a porous structure enhances the conductivity and accelerates the ion transport kinetics of manganese-based oxides but also improves their surface adsorption capacity and structural stability. Consequently, the specific capacity of MnO@C/CWF was 307 mAh g -1 at a current density of 0.2 A g -1 . Furthermore, MnO@C/CWF demonstrates long cycling stability, retaining 82% of its initial capacity after 10,000 cycles at 2 A g -1 . This work presents a strategy to enhance the electrochemical performance of MnO and advances the use of biomass-derived carbon fiber materials in aqueous zinc-ion batteries.
摘要：
Bamboo particleboards are recognized as a highly promising alternative to traditional wood particleboards owing to their short growth cycle, abundant availability, and exceptional mechanical properties. However, bamboo particleboards frequently exhibit undesirable hygroscopicity, which limits their broader applications. This study introduces a straightforward and inhibitor-free carbonization treatment method to enhance the water resistance properties of bamboo particleboards. During the carbonization process, the degradation of hemicelluloses and amorphous cellulose, combined with the condensation reactions among lignin molecules, leads to a significant reduction in the hydrophilic hydroxyl and carbonyl group content, resulting in a more compact micro-fibril structure. Concurrently, the degradation of specific macromolecules within the cell wall facilitates the crushing of bamboo during particleboard pressing, thereby reducing the macroscopic pore size between the particles in the board. When compared to the original bamboo particleboard, the moisture absorption, 24-h water absorption (at a relative humidity of 50 %), 24-h thickness swelling, and bound water content of the deep carbon bamboo particleboard decreased by 32.28 %, 81.57 %, 67.16 %, and 66.7 %, respectively, while the water contact angle increased by 88.89 %.
Bamboo particleboards are recognized as a highly promising alternative to traditional wood particleboards owing to their short growth cycle, abundant availability, and exceptional mechanical properties. However, bamboo particleboards frequently exhibit undesirable hygroscopicity, which limits their broader applications. This study introduces a straightforward and inhibitor-free carbonization treatment method to enhance the water resistance properties of bamboo particleboards. During the carbonization process, the degradation of hemicelluloses and amorphous cellulose, combined with the condensation reactions among lignin molecules, leads to a significant reduction in the hydrophilic hydroxyl and carbonyl group content, resulting in a more compact micro-fibril structure. Concurrently, the degradation of specific macromolecules within the cell wall facilitates the crushing of bamboo during particleboard pressing, thereby reducing the macroscopic pore size between the particles in the board. When compared to the original bamboo particleboard, the moisture absorption, 24-h water absorption (at a relative humidity of 50 %), 24-h thickness swelling, and bound water content of the deep carbon bamboo particleboard decreased by 32.28 %, 81.57 %, 67.16 %, and 66.7 %, respectively, while the water contact angle increased by 88.89 %.
期刊：
Industrial Crops and Products,2025年225:120471 ISSN：0926-6690
通讯作者：
Li, XZ
作者机构：
[Lu, Ying; Zhou, Jun; Wang, Yuqing; Li, Xiangzhou; Zhou, Peng; Li, XZ] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Jiang, Zhi] Hunan Prima Drug Res Ctr Co Ltd, Hunan Key Lab Pharmacodynam & Safety Evaluat New D, Changsha 410329, Hunan, Peoples R China.
通讯机构：
[Li, XZ ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Fir essential oil;Microcapsules;Hydrophobicity;Antifungal;Building materials
摘要：
Natural anti-mildew agents are widely used in wood building materials because of its renewable and environmental protection characteristics. This study innovatively proposed a wood cell cavity to encapsulate plant essential oil for filling wood-based panels, aiming to enhance hydrophobicity and antifungal performance. Essential oil-esterophilic wood microcapsules (EO-EWM) were constructed with the strong natural barrier function of the wood cell walls to encapsulate fir essential oil in the cell cavity. The loading capacity of the essential oil in EO-EWM reached 695.3 mg/g, exhibiting outstanding slow-release properties, with a release rate of 59.9 % after 56 days of simulated release. The release mechanism followed the Fickian diffusion mechanism driven by concentration gradients. During the pressing process of the wood-based panel, the additional amount of EO-EWM was controlled within 30 % to ensure the mechanical properties of the panels. More importantly, the addition of EO-EWM significantly enhanced the self-cleaning capability and hydrophobic performance of the wood-based panels while the risk of mold growth on the panels reduced effectively. Essential oil wood-based panels (EO-WBP) exhibited effective antifungal of 75.0 % against Aspergillus niger and of 83.3 % against Penicillium citrinum . The main mechanism of the anti-mold was that the fir essential oil caused the distortion, shrinkage, and cracking of mycelium, thus inhibiting or killing mold. This study provides an effictive and environmentally friendly strategy for constructing hydrophobic and antifungal properties of wood-based panel for building materials.
Natural anti-mildew agents are widely used in wood building materials because of its renewable and environmental protection characteristics. This study innovatively proposed a wood cell cavity to encapsulate plant essential oil for filling wood-based panels, aiming to enhance hydrophobicity and antifungal performance. Essential oil-esterophilic wood microcapsules (EO-EWM) were constructed with the strong natural barrier function of the wood cell walls to encapsulate fir essential oil in the cell cavity. The loading capacity of the essential oil in EO-EWM reached 695.3 mg/g, exhibiting outstanding slow-release properties, with a release rate of 59.9 % after 56 days of simulated release. The release mechanism followed the Fickian diffusion mechanism driven by concentration gradients. During the pressing process of the wood-based panel, the additional amount of EO-EWM was controlled within 30 % to ensure the mechanical properties of the panels. More importantly, the addition of EO-EWM significantly enhanced the self-cleaning capability and hydrophobic performance of the wood-based panels while the risk of mold growth on the panels reduced effectively. Essential oil wood-based panels (EO-WBP) exhibited effective antifungal of 75.0 % against Aspergillus niger and of 83.3 % against Penicillium citrinum . The main mechanism of the anti-mold was that the fir essential oil caused the distortion, shrinkage, and cracking of mycelium, thus inhibiting or killing mold. This study provides an effictive and environmentally friendly strategy for constructing hydrophobic and antifungal properties of wood-based panel for building materials.
作者机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China;[Luosong Zheng; Heping Luo; Yuxin Zhong; Wanqian Li; Han Xu; Fuquan Xiong; Jiahao Pi; Yan Qing; Yiqiang Wu] College of Materials Science and Engineering, Central South University of Forestry and Technology,Changsha 410004,PR China
通讯机构：
[Han Xu; Yan Qing] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China
关键词：
Electrocatalyst;Built-in electric field;Hierarchical porous structure;Wood;Oxygen evolution reaction
摘要：
Interface engineering has emerged as a promising strategy for efficiently enhancing catalytic performance. Herein, we present a built-in electric field (BEF) strategy to assemble Co 9 S 8 /Ni 3 S 2 heterojunctions confined in S-doped carbon matrix (SC) and anchored S-doped carbide wood framework (SCW). Leveraging BEF, Co-S-Ni charge transfer channels and the superior mass transfer properties inherent in wood’s unique structure, (Co 9 S 8 /Ni 3 S 2 )@SC/SCW exhibits a low overpotential of 220 mV at 50 mA cm −2 , and remarkable stability. The experimental characterizations and theoretical simulation indicate that the constructed BEF can induce the directional transfer of electrons from Co 9 S 8 to Ni 3 S 2 , which is beneficial for the adsorption of OH - owing to the electrostatic interaction, thereby promotes the formation of the highly active amorphous metal hydroxide oxides at lower OER potentials. This work provides a new perspective for exploring the design of energy storage and conversion catalysts based on renewable wood substrates.
Interface engineering has emerged as a promising strategy for efficiently enhancing catalytic performance. Herein, we present a built-in electric field (BEF) strategy to assemble Co 9 S 8 /Ni 3 S 2 heterojunctions confined in S-doped carbon matrix (SC) and anchored S-doped carbide wood framework (SCW). Leveraging BEF, Co-S-Ni charge transfer channels and the superior mass transfer properties inherent in wood’s unique structure, (Co 9 S 8 /Ni 3 S 2 )@SC/SCW exhibits a low overpotential of 220 mV at 50 mA cm −2 , and remarkable stability. The experimental characterizations and theoretical simulation indicate that the constructed BEF can induce the directional transfer of electrons from Co 9 S 8 to Ni 3 S 2 , which is beneficial for the adsorption of OH - owing to the electrostatic interaction, thereby promotes the formation of the highly active amorphous metal hydroxide oxides at lower OER potentials. This work provides a new perspective for exploring the design of energy storage and conversion catalysts based on renewable wood substrates.
摘要：
The development of a straightforward, universally applicable methodology for transforming short, rigid fibers into ultra-long, high-toughness fibers is of significant theoretical and practical importance, presenting considerable challenges in its execution. Inspired by the intricate structure of natural silk, a biomimetic interface engineering technique is developed to fabricate extensive, high-toughness bamboo filaments. These filaments feature a unique design with alternating layers of soft silk fibroin acting as a flexible sheath between rigid bamboo microfibers, markedly enhancing the strain and toughness of the resulting bamboo-silk filaments (BSFs). Consequently, the BSFs exhibit an extraordinary toughness of 115 +/- 17 MJ m(-3), approximate to 12 times greater than that of pristine bamboo microfibers. By leveraging the tunable mechanical properties of silk fibroin, the approach offers a versatile strategy to bolster the toughness of various materials, including biopolymers (e.g., cellulose), synthetic polymers (e.g., aromatic polyamide), and inorganics (e.g., fiberglass). This enhancement is achieved by precisely modulating the interactions between the soft protein matrix and rigid inclusions, providing a novel approach for fabricating high-toughness fibers and significantly expanding the potential applicability of biomass, inorganic, or petrochemical-based fibers.
摘要：
Achieving integration of strong electromagnetic wave (EMW) absorption and wide absorption bandwidth through a single-component carbonaceous absorber is still considered a huge challenge due to the impedance mismatch and limited loss mechanisms. Herein, a reed-derived carbon/epoxy (RC/EP) composite absorber with ultra-wide absorption bandwidth and highly strong EMW absorption was fabricated by simultaneous regulation on the micro-structure of RC and establishment of macro-gradient of RC in EP matrix. The compartmentalized structure and gradient distribution of the optimized RC in the EP matrix boosted the reflection and scattering of the EMW, contributing outstanding impedance matching and synergetic EMW dissipation. Therefore, the RC/EP composite with the thickness of 2.0 mm presented a minimum reflection loss (RL min ) of −54.3 dB and an effective absorption bandwidth (EAB) of 6.12 GHz. Varying the content and distribution of RC, the EAB of the RC/EP can cover 99.7 % of the whole Ku band. In addition, the stealth performance of RC/EP absorbing materials under actual far-field conditions is confirmed using Computer Simulation Technology (CST). This work provides a new way to realize a single-component carbonaceous absorber with both broadband and strong EMW absorbing capability, which can satisfy a wide range of applications in the fields of electronics, medical protection, and architectural invisible materials.
Achieving integration of strong electromagnetic wave (EMW) absorption and wide absorption bandwidth through a single-component carbonaceous absorber is still considered a huge challenge due to the impedance mismatch and limited loss mechanisms. Herein, a reed-derived carbon/epoxy (RC/EP) composite absorber with ultra-wide absorption bandwidth and highly strong EMW absorption was fabricated by simultaneous regulation on the micro-structure of RC and establishment of macro-gradient of RC in EP matrix. The compartmentalized structure and gradient distribution of the optimized RC in the EP matrix boosted the reflection and scattering of the EMW, contributing outstanding impedance matching and synergetic EMW dissipation. Therefore, the RC/EP composite with the thickness of 2.0 mm presented a minimum reflection loss (RL min ) of −54.3 dB and an effective absorption bandwidth (EAB) of 6.12 GHz. Varying the content and distribution of RC, the EAB of the RC/EP can cover 99.7 % of the whole Ku band. In addition, the stealth performance of RC/EP absorbing materials under actual far-field conditions is confirmed using Computer Simulation Technology (CST). This work provides a new way to realize a single-component carbonaceous absorber with both broadband and strong EMW absorbing capability, which can satisfy a wide range of applications in the fields of electronics, medical protection, and architectural invisible materials.
期刊：
Chemical Engineering Journal,2025年:162855 ISSN：1385-8947
通讯作者：
Liang Chen
作者机构：
[Meiting Huang; Haoxuan Yu; Zhihao Wang; Yifeng Li; Kechun Chen] National–Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;[Liang Chen] Key Laboratory of Hunan Province for Advanced Carbon–based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;[Chenxi Xu] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;School of Life Science, Jinggangshan University, Ji’an 343009, China
通讯机构：
[Liang Chen] K;Key Laboratory of Hunan Province for Advanced Carbon–based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
摘要：
To face the large–scale retirement of lithium–ion batteries (LIBs), direct regeneration of spent NCM622 (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ) cathode can effectively alleviate the current resource and environmental pressures. During the recycling process, the binder polyvinylidene fluoride (PVDF) inevitably becomes an inherent impurity in the active material. Whether the inherent impurity can assist the regeneration of spent NCM or not is becoming a focus of attentions. Hereby, a closed–loop direct regeneration strategy that transforms the inherent PVDF impurity into a F dopant is proposed, and a LiNO 3 –LiOH eutectic molten system is utilized to repair the elemental loss and structural defects in highly degraded NCM622 cathode while achieving F doping. It is found that the fluorine element is uniformly doped into both the surface and bulk phases of the whole material. The F–containing regenerated NCM cathode (R–NCM622–F) shows a stable layered structure with markedly suppressed lattice oxygen escape, as substantiated by the experimental analysis and theoretical calculation. As a result, the obtained R–NCM622–F exhibits a satisfactory repaired specific capacity of 169.6 mAh g −1 and excellent cycling stability, which retains 85.8 % of its initial capacity after 200 cycles. Meanwhile, it can deliver a considerable capacity of 120mAh g −1 even at a high rate of 5C. Clearly, our regeneration strategy obviates the necessity for intricate pretreatments, and instead employs the inherent PVDF impurity to achieve the direct regeneration process, thereby offering a promising avenue to the large–scale direct regeneration of layered cathodes.
To face the large–scale retirement of lithium–ion batteries (LIBs), direct regeneration of spent NCM622 (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ) cathode can effectively alleviate the current resource and environmental pressures. During the recycling process, the binder polyvinylidene fluoride (PVDF) inevitably becomes an inherent impurity in the active material. Whether the inherent impurity can assist the regeneration of spent NCM or not is becoming a focus of attentions. Hereby, a closed–loop direct regeneration strategy that transforms the inherent PVDF impurity into a F dopant is proposed, and a LiNO 3 –LiOH eutectic molten system is utilized to repair the elemental loss and structural defects in highly degraded NCM622 cathode while achieving F doping. It is found that the fluorine element is uniformly doped into both the surface and bulk phases of the whole material. The F–containing regenerated NCM cathode (R–NCM622–F) shows a stable layered structure with markedly suppressed lattice oxygen escape, as substantiated by the experimental analysis and theoretical calculation. As a result, the obtained R–NCM622–F exhibits a satisfactory repaired specific capacity of 169.6 mAh g −1 and excellent cycling stability, which retains 85.8 % of its initial capacity after 200 cycles. Meanwhile, it can deliver a considerable capacity of 120mAh g −1 even at a high rate of 5C. Clearly, our regeneration strategy obviates the necessity for intricate pretreatments, and instead employs the inherent PVDF impurity to achieve the direct regeneration process, thereby offering a promising avenue to the large–scale direct regeneration of layered cathodes.
摘要：
Heat-treated bamboo bundles (HB) are essential for producing bamboo scrimber, and their fluffing characteristics significantly affect the final product. However, limited research on quantitatively characterizing the fluffing degree of HB has hindered the performance classification, optimization of bamboo scrimber, and its application in areas such as building structures. This study introduced the grayscale image threshold segmentation to obtain eight morphological parameters and their distribution ranges for 200 HB specimens: average diameter (0.26 ∼ 3.42 mm), average fractal dimension (1.12 ∼ 1.25), connectivity (0.11 ∼ 8.45 pcs/mm²), crack ratio ( T-CR ) (6.56 ∼ 90.41 %), fiber bundle area ( T-FBA ) (19.18 ∼ 328.44 mm²), and maximum area of individual fiber bundle ( T-MIFBA ) (1.42 ∼ 286.84 mm²) on the transverse section, crack ratio ( L-CR ) (1.27 ∼ 83.25 %) and fiber bundle area ( L-FBA ) (558 ∼ 11,366 mm²) on the longitudinal section. A multi-scale image analysis approach was employed to analyze the extracted morphological parameters. Relational clustering analysis indicated that the eight morphological parameters can be categorized into four distinct categories. Qualitative clustering analysis revealed clear hierarchical distributions for average diameter and connectivity but fragmented distributions for L-CR and average fractal dimension . Thus, average diameter and connectivity was found to be effective indicators of HB fluffing degree, while L-CR and average fractal dimension were less suitable. This study achieved the quantitative characterization of HB fluffing degree, thereby establishing a solid foundation for optimizing the fluffing process and facilitating the hierarchical classification and utilization of bamboo scrimber.
Heat-treated bamboo bundles (HB) are essential for producing bamboo scrimber, and their fluffing characteristics significantly affect the final product. However, limited research on quantitatively characterizing the fluffing degree of HB has hindered the performance classification, optimization of bamboo scrimber, and its application in areas such as building structures. This study introduced the grayscale image threshold segmentation to obtain eight morphological parameters and their distribution ranges for 200 HB specimens: average diameter (0.26 ∼ 3.42 mm), average fractal dimension (1.12 ∼ 1.25), connectivity (0.11 ∼ 8.45 pcs/mm²), crack ratio ( T-CR ) (6.56 ∼ 90.41 %), fiber bundle area ( T-FBA ) (19.18 ∼ 328.44 mm²), and maximum area of individual fiber bundle ( T-MIFBA ) (1.42 ∼ 286.84 mm²) on the transverse section, crack ratio ( L-CR ) (1.27 ∼ 83.25 %) and fiber bundle area ( L-FBA ) (558 ∼ 11,366 mm²) on the longitudinal section. A multi-scale image analysis approach was employed to analyze the extracted morphological parameters. Relational clustering analysis indicated that the eight morphological parameters can be categorized into four distinct categories. Qualitative clustering analysis revealed clear hierarchical distributions for average diameter and connectivity but fragmented distributions for L-CR and average fractal dimension . Thus, average diameter and connectivity was found to be effective indicators of HB fluffing degree, while L-CR and average fractal dimension were less suitable. This study achieved the quantitative characterization of HB fluffing degree, thereby establishing a solid foundation for optimizing the fluffing process and facilitating the hierarchical classification and utilization of bamboo scrimber.
摘要：
The directional migration of S-vacancy is beneficial to the separation of photogenerated carriers and the transition of electrons in semiconductors. In this study, Bi(x)/Bi(2-x)S(y)@carboxylic-cellulose (CC) photocatalyst with bionic chloroplast structure is obtained by electron beam irradiation to induce S-vacancy in Bi(2)S(3)@CC. The results of CO(2) photoreduction experiments demonstrate that the reduction rate of CO(2) to CH(3)OH by Bi(x)/Bi(2‒x)S(2.89)@CC-450 samples is 10.74 µmol·g(-1)·h(-1), and the selectivity is 92.82%. The results show that the inward migration behavior of the borderline S-vacancy (b-S(v)) induces the redistribution of electrons in Bi(x)/Bi(2-x)S(y)@CC. The Bi° clusters in Bi(x)/Bi(2-x)S(y)@CC is conducive to adsorb CO(2), and the internal S-vacancy (i-S(v)) is conducive to adsorb CH(3)OH, which accelerate the transfer of gas-phase products to realize the controllable conversion of CO(2) and photoreduction products at the gas-liquid-solid three-phase interface. This study provides a new idea for the development and utilization of green photocatalysts in clean energy.
通讯机构：
[Qing, Y ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
摘要：
The demand for fire-resistant wood-based materials has grown in response to the increasing urban population density and the widespread construction of high-rise buildings. Inorganic hybridization is a promising strategy to impart hybrid properties to lignocellulosic composites. However, this approach usually leads to a deterioration of the mechanical properties of the resulting composites due to agglomeration of the inorganic particles and insufficient adhesion. In this work, microscopic inorganic particles (ground calcium carbonate, kaolin, fly ash) were pre-mixed with melamine-urea–formaldehyde resin adhesive to solve the agglomeration problem of inorganic particles in organic–inorganic hybrid fiberboards. Additionally, the inclusion of inorganic particles inhibited excessive resin penetration and densified the resulting board, ultimately improving the mechanical properties and flame retardancy of the fiberboards. This work provides a straightforward and scalable approach that enables the well-dispersion of inorganic particles and fosters a strong bonding between wood fibers and inorganic particles to produce high-performance organic–inorganic hybrid fiberboards with higher flame retardancy.
通讯机构：
[Liang, J ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
关键词：
Transition metal phosphides;Metal-organic frameworks;Electrochemical deposition;Overall water splitting
摘要：
Transition metal phosphides (TMPs) have emerged as promising candidates for the hydrogen evolution reaction (HER) due to their tunable phases and electronic structures. However, the development of bifunctional electrocatalysts that effectively balance HER and oxygen evolution reaction (OER) for overall water splitting presents a significant challenge. In this work, we report a novel cauliflower-like bimetallic phosphide, CoMo-P, synthesized on ZIF-67-derived NiCo layered double hydroxide (LDH) through a formic acid-assisted electrochemical phosphating process. This innovative approach not only enhances catalytic efficiency for both HER and OER but also offers a rapid, environmentally friendly, and straightforward fabrication method. The incorporation of formic acid during the electrodeposition process plays a crucial role in optimizing the catalyst's composition and microstructure. Specifically, formic acid facilitates the reduction rate of hypophosphite and stabilizes charged intermediates, thereby reducing the electrodeposition energy barrier and enhancing phosphating efficiency. As a result, the CoMo-P(NCL)/NF electrode demonstrates exceptional HER performance in alkaline media, achieving overpotentials of 55 mV and 108 mV at current densities of 10 and 50 mA cm ‑ 2 , respectively, significantly outperforming the control sample without formic acid addition (η 10 = 80.4 mV, η 50 = 142 mV). Moreover, the electrode exhibits remarkable OER activity with overpotentials of 273 mV and 310 mV at 10 and 50 mA cm ‑ 2 , respectively. When employed as a bifunctional catalyst for overall water splitting, the CoMo-P(NCL)/NF electrode pair requires a low cell voltage of 1.574 V to achieve a current density of 10 mA cm ‑ 2 , surpassing the performance of numerous reported bifunctional catalysts. This study provides a promising strategy for the rational design and practical application of high-performance bifunctional electrocatalysts in sustainable energy conversion systems.
Transition metal phosphides (TMPs) have emerged as promising candidates for the hydrogen evolution reaction (HER) due to their tunable phases and electronic structures. However, the development of bifunctional electrocatalysts that effectively balance HER and oxygen evolution reaction (OER) for overall water splitting presents a significant challenge. In this work, we report a novel cauliflower-like bimetallic phosphide, CoMo-P, synthesized on ZIF-67-derived NiCo layered double hydroxide (LDH) through a formic acid-assisted electrochemical phosphating process. This innovative approach not only enhances catalytic efficiency for both HER and OER but also offers a rapid, environmentally friendly, and straightforward fabrication method. The incorporation of formic acid during the electrodeposition process plays a crucial role in optimizing the catalyst's composition and microstructure. Specifically, formic acid facilitates the reduction rate of hypophosphite and stabilizes charged intermediates, thereby reducing the electrodeposition energy barrier and enhancing phosphating efficiency. As a result, the CoMo-P(NCL)/NF electrode demonstrates exceptional HER performance in alkaline media, achieving overpotentials of 55 mV and 108 mV at current densities of 10 and 50 mA cm ‑ 2 , respectively, significantly outperforming the control sample without formic acid addition (η 10 = 80.4 mV, η 50 = 142 mV). Moreover, the electrode exhibits remarkable OER activity with overpotentials of 273 mV and 310 mV at 10 and 50 mA cm ‑ 2 , respectively. When employed as a bifunctional catalyst for overall water splitting, the CoMo-P(NCL)/NF electrode pair requires a low cell voltage of 1.574 V to achieve a current density of 10 mA cm ‑ 2 , surpassing the performance of numerous reported bifunctional catalysts. This study provides a promising strategy for the rational design and practical application of high-performance bifunctional electrocatalysts in sustainable energy conversion systems.
通讯机构：
[Zhang, L ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Minist Forestry Bioethanol Res Ctr, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China.
摘要：
The high-value utilization of Camellia oleifera, a major agroforestry waste, is critical for sustainable biomass management. This study presents a green integrated process for efficient lignin extraction and controllable nanoparticle synthesis via acidic solvent extraction and solvent-exchange nanotechnology. Two solvent systems were systematically optimized: HCl/1,4-dioxane achieved higher lignin purity (71.53%-73.52%) under optimal conditions (110 degrees C, 75 min, 90% solvent ratio), whereas p-TsOH/ethylene glycol low eutectic solvent (70 degrees C, 75 min, 65% ratio) yielded superior extraction efficiency (27.38%-28.74%). Subsequent solvent exchange enabled precise regulation of lignin nanoparticle morphology and size. Solvent polarity governed structural outcomes, with acetone producing elongated porous particles (153 +/- 1 nm, PDI = 0.322) and tetrahydrofuran (THF) generating uniform spheres (140 +/- 1 nm, PDI = 0.109). FTIR and zeta potential analyses revealed that tetrahydrofuran's hydrophobic effects enhanced surface electronegativity (-37.5 mV), conferring exceptional colloidal stability (<1% size increase over 30 days). Synergistic optimization of THF/water ratio (50%) and lignin concentration (0.7 mg/ml) produced ultrasmall nanoparticles (80 nm, PDI = 0.082). This work elucidates the multiscale mechanism of solvent polarity in lignin extraction-nanostructuring and establishes a low-carbon pathway for agroforestry waste valorization. The methodology demonstrates significant potential for advancing green material synthesis and nanotechnology applications through biomass-derived functional nanomaterials. (c) 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND) license (https://creativecommons.org/licenses/by-nc-nd/4.0/).
期刊：
Wood Science and Technology,2025年59(1):1-13 ISSN：0043-7719
通讯作者：
Yuanyuan Liao<&wdkj&>Jinbo Hu
作者机构：
[Jiani Zhou; Gonggang Liu; Xuebing Yi; Yuanyuan Liao; Shanshan Chang; Jinbo Hu] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China;[Chongqing Wang] School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
通讯机构：
[Yuanyuan Liao; Jinbo Hu] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
摘要：
The exploitation of low-cost, non-fossil membrane materials with flourishing pore structure is essential to complete an organic dye wastewater treatment in Fenton-like catalytic technology. The accessible and scalable veneer functionalized Fenton-like catalysis has been manufactured to decolorize the effluents by a hydrogen peroxide-Mn-based oxides system. The nanocatalyst of Mn-based oxides has been loaded on the veneer surface by the hydrothermal in-situ growth, which could accomplish the coupling of Fenton-like catalyst and membrane technology. Fir and poplar veneers with unique three-dimensional porous structure have been investigated in detail to manifest the respective performance of decolorization during the dye wastewater treatment. This work not only has invented a promising membrane material coupling with Fenton-like catalysis to dispose dye wastewater, but also provides a reference in high-performance membrane design of biomimetic membrane.
摘要：
The inherent structural alignment of Chinese fir scraps utilized in energy storage applications is intriguing. To enhance performance and achieve a symmetrical supercapacitor configuration, nano-pores have been introduced into the carbonized Chinese fir slice, while carbon nanotubes have been synthesized on the tracheid walls to increase its specific surface area. However, achieving high energy density and cycle stability in electrodes remains a significant challenge. Here, the challenge is addressed by synthesizing aligned carbon nanotubes through chemical vapor deposition in Chinese fir tracheids, aiming to enhance conductivity and increase the specific surface area. Furthermore, MnO2 nanosheets are electrochemically deposited on the inner surface of the tracheids to improve specific capacitance to 652.0 F g−1 at 10 mA cm−2. The assembled all-solid-state asymmetric supercapacitor exhibits a high energy density of 48.6 Wh kg−1, which is about twice that of supercapacitors made of other biomass materials. The capacitance of the material remains at 93 % even after undergoing 10,000 charge-discharge cycles within a voltage range of 0 to 1.8 V.
The inherent structural alignment of Chinese fir scraps utilized in energy storage applications is intriguing. To enhance performance and achieve a symmetrical supercapacitor configuration, nano-pores have been introduced into the carbonized Chinese fir slice, while carbon nanotubes have been synthesized on the tracheid walls to increase its specific surface area. However, achieving high energy density and cycle stability in electrodes remains a significant challenge. Here, the challenge is addressed by synthesizing aligned carbon nanotubes through chemical vapor deposition in Chinese fir tracheids, aiming to enhance conductivity and increase the specific surface area. Furthermore, MnO2 nanosheets are electrochemically deposited on the inner surface of the tracheids to improve specific capacitance to 652.0 F g−1 at 10 mA cm−2. The assembled all-solid-state asymmetric supercapacitor exhibits a high energy density of 48.6 Wh kg−1, which is about twice that of supercapacitors made of other biomass materials. The capacitance of the material remains at 93 % even after undergoing 10,000 charge-discharge cycles within a voltage range of 0 to 1.8 V.
作者：
Bo Chen;Chengliang Zhou;Wentao Xiong;Jie Peng;Xiaohu Luo;...
期刊：
Journal of Colloid and Interface Science,2025年678(Pt A):742-756 ISSN：0021-9797
通讯作者：
Luo, Xiaohu;Liu, Yali
作者机构：
[Yali Liu; Xiaohu Luo; Bo Chen] School of Chemistry and Environment, Jiaying University, Meizhou, Guangdong 514000, P. R. China;[Yali Liu; Xiaohu Luo; Bo Chen] State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P.R. China;[Chengliang Zhou] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China;[Jie Peng; Xinyu Pan; Wentao Xiong] State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, P.R. China;[Xiaohu Luo] Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, P. R. China. Electronic address: luoxiaohu4812350@163.com
通讯机构：
[Luo, Xiaohu] E;[Liu, Yali] S;Engineering Research Center of Loss Efficacy and Anticorrosion of Materials of Guizhou, School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun, Guizhou 558000, P. R. China. Electronic address:;Sokan Research Institute of Advanced Surface Treatment and Functional Coatings, Changsha, Hunan 410600, P.R. China. Electronic address:
摘要：
Aluminum and its alloys have been widely used in our lives. However, Aluminum and its alloys is prone to corrosion, especially in harsh environment. In recent years, hydrophobic coatings were used in the corrosion protection of metal. But, the low surface tension of resins made them have a worse wettability on metal which had high surface tension, resulting in a worse adhesion of these coatings. Herein, we developed a long-lasting anti-corrosion direct-to-metal polyurethane NP-Glide coating based on the coordination effect of polyphenol and dual cross-linking. In comparative evaluation, the corrosion protection and anti-contamination performances of direct-to-metal polyurethane NP-Glide coating are significantly improved by the introduction of functional monomer dopamine methacrylamide (DMA) and TEMAc-8. The PU coatings with 10wt% TEMAc-8 possesses high impedance value (|Z|(0.01Hz)>10(9) Ω•cm(2)) after 40days of immersion in 3.5wt% NaCl solution, exhibiting a great pull-off adhesion both in dry and wet coating, and a long-term anti-corrosion performance for aluminum alloy protection.
期刊：
Journal of Alloys and Compounds,2025年:180628 ISSN：0925-8388
通讯作者：
Pingping Yao
作者机构：
[Deshan Chen; Li Kang; Xing Wang; Ziyi Liu; Yuxuan Xu; Donglin Liu; Pingping Yao] State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;[Haibin Zhou] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
通讯机构：
[Pingping Yao] S;State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China
摘要：
The interaction layer on the rail surface resulting from friction, adhesion, and melting of CuCrZr/AlMgSi friction pairs during ultra-high speed sliding electrical contact, such as in electromagnetic rail launch systems, plays a critical role in determining the lifespan and performance of the copper rail. This study investigates the evolution of the interaction layer microstructure, elemental diffusion behavior, and the formation mechanism of intermetallic compounds (IMCs) and mechanical properties after 45 launches. Results show that copper diffuses into aluminum, forming a diffusion layer in interaction layer. Moreover, there are two diffusion mechanisms with different armature speeds in diffusion layer. At low armature speeds, grain-boundary diffusion dominates as the primary diffusion mechanism within the diffusion layer. The network-like CuAl 2 , CuAl 2 layer and oxide layer result from the combined effects of electricity and mechanical force. With the higher armature speed, temperature and electricity promote the formation of a Al/CuAl 2 /Cu 9 Al 4 /Cu multi-layer semi-coherent interface in the interaction layer governed by the lattice diffusion mechanism. Meanwhile, the interaction layer exhibits mechanical properties with highest nanoindentation hardness (5.03 GPa), elastic modulus (122.74 GPa), and interface bonding strength (262.19 MPa) due to the contribution of IMCs and Al 2 O 3 particles. The findings of this study can provide theoretical guidance for the development of rail and armature contact status and performance, as well as for improving the lifespan and precision of electromagnetic rail launch systems.
The interaction layer on the rail surface resulting from friction, adhesion, and melting of CuCrZr/AlMgSi friction pairs during ultra-high speed sliding electrical contact, such as in electromagnetic rail launch systems, plays a critical role in determining the lifespan and performance of the copper rail. This study investigates the evolution of the interaction layer microstructure, elemental diffusion behavior, and the formation mechanism of intermetallic compounds (IMCs) and mechanical properties after 45 launches. Results show that copper diffuses into aluminum, forming a diffusion layer in interaction layer. Moreover, there are two diffusion mechanisms with different armature speeds in diffusion layer. At low armature speeds, grain-boundary diffusion dominates as the primary diffusion mechanism within the diffusion layer. The network-like CuAl 2 , CuAl 2 layer and oxide layer result from the combined effects of electricity and mechanical force. With the higher armature speed, temperature and electricity promote the formation of a Al/CuAl 2 /Cu 9 Al 4 /Cu multi-layer semi-coherent interface in the interaction layer governed by the lattice diffusion mechanism. Meanwhile, the interaction layer exhibits mechanical properties with highest nanoindentation hardness (5.03 GPa), elastic modulus (122.74 GPa), and interface bonding strength (262.19 MPa) due to the contribution of IMCs and Al 2 O 3 particles. The findings of this study can provide theoretical guidance for the development of rail and armature contact status and performance, as well as for improving the lifespan and precision of electromagnetic rail launch systems.
摘要：
To address the issues of electrode passivation and high electric energy consumption ( EEC ) associated with the removal of antibiotic wastewater using traditional direct current electrocatalytic oxidation (DCEO) with Boron-Doped Diamond (BDD) electrodes, this study aims to develop an efficient, low-cost, and self-cleaning BDD electrode pulsed alternating electrocatalytic oxidation (BDD-PAEO) technology. The experimental findings demonstrated that, under optimal conditions, the BDD-PAEO mode achieved a 99.9% removal efficiency for sulfamethazine (SMZ). Furthermore, the removal efficiency of COD in the BDD-PAEO mode consistently remained above 93% in 10 experimental cycles. Compared with the BDD-DCEO mode, the EEC of the BDD-PAEO mode is reduced by 17.39%, and the current efficiency ( CE ) is increased by 47.15%. The ·OH was confirmed to be the main active oxidant species for degradation of SMZ by free radical quenching experiments, electron paramagnetic resonance (EPR) and three-dimensional excitation-emission matrix (3D-EEM) spectroscopy. The degradation pathway of SMZ was revealed by density functional theory (DFT) calculation and gas chromatography-mass spectrometry (GC-MS) analysis. Toxicity estimation illustrated that BDD-PAEO technology can effectively reduce the toxicity of wastewater after SMZ degradation. This study shows BDD-PAEO technology’s high potential for efficient SMZ degradation and toxicity reduction in antibiotic wastewater, offering a novel treatment solution.
To address the issues of electrode passivation and high electric energy consumption ( EEC ) associated with the removal of antibiotic wastewater using traditional direct current electrocatalytic oxidation (DCEO) with Boron-Doped Diamond (BDD) electrodes, this study aims to develop an efficient, low-cost, and self-cleaning BDD electrode pulsed alternating electrocatalytic oxidation (BDD-PAEO) technology. The experimental findings demonstrated that, under optimal conditions, the BDD-PAEO mode achieved a 99.9% removal efficiency for sulfamethazine (SMZ). Furthermore, the removal efficiency of COD in the BDD-PAEO mode consistently remained above 93% in 10 experimental cycles. Compared with the BDD-DCEO mode, the EEC of the BDD-PAEO mode is reduced by 17.39%, and the current efficiency ( CE ) is increased by 47.15%. The ·OH was confirmed to be the main active oxidant species for degradation of SMZ by free radical quenching experiments, electron paramagnetic resonance (EPR) and three-dimensional excitation-emission matrix (3D-EEM) spectroscopy. The degradation pathway of SMZ was revealed by density functional theory (DFT) calculation and gas chromatography-mass spectrometry (GC-MS) analysis. Toxicity estimation illustrated that BDD-PAEO technology can effectively reduce the toxicity of wastewater after SMZ degradation. This study shows BDD-PAEO technology’s high potential for efficient SMZ degradation and toxicity reduction in antibiotic wastewater, offering a novel treatment solution.
期刊：
Journal of Colloid and Interface Science,2025年678(Pt C):864-872 ISSN：0021-9797
通讯作者：
Xia, Liaoyuan;Wu, Yiqiang
作者机构：
[Li, Xingong; Liao, Yu; Du, Kun; Liu, Lei; Qing, Yan; Gao, Zhifei] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China;[Xia, Liaoyuan] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China. Electronic address: xly1516@126.com;[Wu, Yiqiang] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China. Electronic address: wuyq0506@126.com
通讯机构：
[Xia, Liaoyuan; Wu, Yiqiang] C;College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China. Electronic address:
摘要：
Two-dimensional nano-MoS(2) holds remarkable potential for widespread use in hydrogen evolution reaction (HER) applications owing to its high catalytic activity, abundant availability, and low cost. However, its electrocatalytic performance is significantly lower than that of Pt-based catalysts necessitating strategies to improve its catalytic activity. We developed an effective strategy for enhancing the HER performance of MoS(2) based on the synergistic effect of oxygen vacancies (O(v)), heterostructures, and interfacial wettability. In particular, highly graphitized wood-based carbon (GWC) was used as a platform to prepare a hydrophilic/aerophobic MoS(2)@O(v)-NiO-GWC heterocatalyst featuring nanosheet stacking and containing abundant O(v). Consequently, a current density of 10mA cm(-2) and an overpotential of only 77mV were achieved in a 1M KOH electrolyte using the prepared catalyst; notably, the overpotential increase was only 1.2% after continuous operation for 90h. Density functional theory calculations showed that coupling MoS(2) with the O(v)-NiO heterointerface increased the exposure of the MoS(2) active sites on the heterointerface and accelerated the electron transfer between NiO and the MoS(2) interface, considerably enhancing the HER performance. Moreover, an overall urea electrolysis cell assembled using this heterocatalyst demonstrated excellent hydrogen production activity and durability, with current densities of 10 and 100mA cm(-2) at cell voltages of only 1.33 and 1.46V, respectively. Even after continuous operation for 75h at a current density of 100mA cm(-2), the cell exhibited a voltage retention rate of 92.8%. These results demonstrate the potential of this nano-heterocatalyst to efficiently produce hydrogen via overall urea electrolysis.
