作者：
Jie Ouyang;Liangliang Zhou;Yi Tian;Wanning Xiong;Lixin Wang;...
期刊：
Journal of Cleaner Production,2024年446:141503 ISSN：0959-6526
通讯作者：
Yongfeng Luo
作者机构：
[Jie Ouyang; Liangliang Zhou; Yi Tian; Wanning Xiong; Lixin Wang; Xi Ren; Qingquan Sheng; Zejun Li; Xiubo Liu; Yongfeng Luo] Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan, 410004, PR China
通讯机构：
[Yongfeng Luo] H;Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha, Hunan, 410004, PR China
摘要：
The utilization of wood-derived carbon thick electrodes has demonstrated remarkable structural advantages in the realm of electrochemical energy storage and catalysis. Its exceptional structural stability, mechanical strength, and well-organized pore structure position it as a promising material for self-supporting electrodes. The multi-scale cross-linking of lignin, cellulose, and hemicellulose within the wood tracheid wall establishes a convenient prerequisite for structural modification. However, the significance of dynamic nanopores on wood tracheid walls in enhancing the microporous/mesoporous structure of wood-derived carbon electrodes has been overlooked due to the focus on operability of microscale array pores and wood decomposition processes. Here, we employ a straightforward, highly efficient, and environmentally sustainable solvent infiltration strategy to enhance the nanopore content within the wood tracheid wall, ultimately resulting in a significant enhancement of the microporous/mesoporous composition within the wood-derived electrode. The charge storage capacity of wood-derived carbon electrode is doubled through the implementation of a solvent permeation modification strategy, while its abundant micro/mesoporous structure also endows it with significant potential in the field of electrocatalysis. Therefore, this thermal and solvent permeation modification strategy is anticipated to supplant the conventional acid-base etching method and offer a novel research concept for the advancement of wood-based carbon electrodes with abundant pore structure and exceptional electrochemical properties.
摘要：
Breathable and comfortable sensing textiles that can detect multi-biomarkers existing in human sweat are a promising way to achieve comprehensive health monitoring in our daily life. However, current wearable and flexible electrochemical textiles lack stretchability, which can result in unstable signals or device damage during movement. Additionally, these textiles have limited integration of multiple indicators, needing a large surface area and a significant amount of sweat to activate the sensors. Herein, we report an integrated all-in-one multifunctional electrochemical biosensor fiber constructed with a helical core-sheath structure, offering the stretchability and ability to detect biomarkers with trace amounts of sweat. The biosensor was fabricated by arranging multi-functionalized carbon nanotube strips in a spiral pattern alongside a pre-stretched polymer fiber core acting as microelectrodes with robust interface. Additionally, a super-hydrophilic sheath layer is incorporated to enhance the sweat capture efficiency of the biosensor. The biosensor has the capability to simultaneously monitor six biomarkers including pH, K+, Na+, glucose, lactate and uric acid, demonstrating stable sensing performance under 300% strain. Merely 1 of sweat is needed to initiate the detection of all six biomarkers. The resulting textile sensing system presents continuous and real-time monitoring of multi-biomarker information, allowing for the assessment of our health condition.
摘要：
Wood, as a uniquely ordered porous material, plays an indispensable role in energy storage devices. Here, wood shavings (WS) are utilized as a flexible substrate to form an electrode material with excellent flexibility. A conductive coating material made of spinnable carbon nanotube (CNT) film is applied onto the wood shavings, while polyaniline (PANI) nanoparticles are chemically polymerized in situ and deposited onto the CNT film to create flexible electrodes. CNTs offer optimal pathways for electron transport and establish stable connections among PANI particles. Furthermore, the incorporation of the CNT film causes an augmentation of the conductivity of WS substrate. The PANI/CNT@WS exhibits an outstanding specific capacity of 152.81 F g-1 at 0.2 A g-1. The flexible supercapacitor (FSC) presents a high specific capacitance of 45.89 F g-1 at 0.2 A g-1, and capacity rate is as high as 98.98 % after 1000 charge-discharge cycles. Even when bent to 120 degrees, the capacity remains 62.9 %. Therefore, the composite electrode demonstrates exceptional flexibility and excellent electrochemical performance.
摘要：
A novel 3D stacked corrugated pore structure of polyaniline (PANI)/CoNiO(2)@activated wood-derived carbon (AWC) has been successfully constructed to prepare high-performance electrode materials for supercapacitors. AWC functions as a supporting framework that provides ample attachment sites for the loaded active materials. The CoNiO(2) nanowire substrate, consisting of 3D stacked pores, not only serves as a template for subsequent PANI loading, but also acts as an effective buffer to mitigate the volume expansion of the PANI during ionic intercalation. The distinctive corrugated pore structure of PANI/CoNiO(2)@AWC facilitates electrolyte contact and significantly enhances the electrode material properties. The PANI/CoNiO(2)@AWC composite materials exhibit excellent performance (14.31F cm(-2) at 5mAcm(-2)) and superior capacitance retention (80% from 5 to 30mAcm(-2)), owing to the synergistic effect among their components. Finally, PANI/CoNiO(2)@ AWC//reduced graphene oxide (rGO)@AWC asymmetric supercapacitor is assembled, which has a wide operating voltage (0∼1.8V), high energy density (4.95mWhcm(-3) at 26.44 mW cm(-3)) and cycling stability (90.96% after 7000 cycles).
通讯机构：
[Zhou, C ] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.
关键词：
digital elevation model;SRTM DEM;ICESat-2;forest;PSO-DBN
摘要：
The Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is extensively utilized in various fields, such as forestry, oceanography, geology, and hydrology. However, due to limitations in radar side-view imaging, the SRTM DEM still contains gaps and anomalies, particularly in areas with an intricate topography, like forests. To enhance the accuracy of the SRTM DEM in forested regions, commonly employed approaches include regression analysis and artificial neural networks (ANN). Nevertheless, existing regression methods struggle to accurately capture the intricate nonlinear relationship between the error and influencing factors. Additionally, traditional ANN models are susceptible to overfitting, resulting in subpar accuracy. Deep Belief Network (DBN) is a highly precise algorithm in deep learning. However, the intricate combination of hyperparameters often leads to limited generalization ability and model robustness when correcting DEM. The present study proposes an error prediction model based on the DBN optimized by Particle Swarm Optimization (PSO) for SRTM DEM correction. By utilizing the PSO algorithm, we aim to identify the optimal combination of hyperparameters of DBN, including the number of neurons in the hidden layer and the learning rates. The experiment focuses on two regions in Hunan Province, China, characterized by abundant vegetation cover. The reference data utilized for comparison is ICESat/GLAS data. The experimental results demonstrate that the mean error (ME) and root mean square error (RMSE) of the SRTM DEM corrected by the proposed algorithm in these two regions are significantly reduced by 93.5%-96.0% and 21.5%-23.5%, respectively. Moreover, there is an improvement of over 26.1% in accuracy within complex terrain areas. Specifically, in broadleaf forest, the PSO-DBN method exhibits a remarkable accuracy improvement of 26.2%, while the DBN-corrected SRTM DEM shows an improvement of 15.3%. In coniferous forest, the PSO-DBN method achieves an accuracy improvement of 14.8%, whereas the DBN-corrected SRTM DEM demonstrates a gain of 5.8%. The approach provides a more effective and robust tool for correcting SRTM DEM or other similar DEMs over vegetated mountain areas.
作者机构：
[Li, Mengyao; Lu, Yuxin; Zhou, Cui; Ouyang, Jie; Zhao, Linlin; Hua, Ziheng; Wang, Xiaoman; Luo, Yongfeng; Xiong, Wanning; Liu, Gonggang; Yin, Wei] Cent South Univ Forestry & Technol, Coll Sci, Mat Sci & Engn Sch, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.;[Xu, Binghui] Qingdao Univ, Inst Mat Energy & Environm, Sch Mat Sci & Engn, Qingdao 266071, Peoples R China.
通讯机构：
[Gonggang Liu; Yongfeng Luo] H;Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Material Science and Engineering School, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Authors to whom correspondence should be addressed.
关键词：
semi-embedding;transition metal oxides;hybrid ZIFs;wood-derived carbon;supercapacitors
摘要：
Transition metal oxides (TMOs) can provide high theoretical capacitance due to the change of multiple valence states of transition metals. However, their intrinsic drawbacks, including poor electrical conductivity, lower energy density, and huge volume expansion, will result in the pulverization of electrode materials and restricted electrochemical kinetics, thus leading to poor rate capability and rapid capacity fading. Composite electrodes based on transition metal oxides and carbon-based materials are considered to be promising candidates for overcoming these limitations. Herein, we reported a preparation method of hybrid ZIFs derived Zn-doped Co3O4/carbon (Zn-Co3O4/C-230) particles semi-embedded in wood-derived carbon skeleton for integrated electrodes. A large specific surface area, excellent conductivity, and electrochemical stability provide a larger electrochemical activity and potential window for the electrode. Prepared Zn-Co3O4@CW-230 electrode (0.6 mm thick) displays ultrahigh area specific capacitances of 7.83 and 6.46 F cm(-2) at the current densities of 5 and 30 mA cm(-2), respectively. Moreover, a symmetric supercapacitor assembled by two identical Zn-Co3O4@CW-230 electrodes delivers a superior area-specific capacitance of 2.61 F cm(-2) at the current densities of 5 mA cm(-2) and great energy densities of 0.36 mWh cm(-2) (6.0 mWh cm(-3)) at 2.5 mW cm(-2), while maintaining 97.3% of initial capacitance over 10,000 cycles. It notably outperforms those of most carbon-based metal oxides, endowing the Zn-Co3O4@CW-230 with extensive prospects for practical application.
期刊：
ACS Applied Energy Materials,2022年5(6):7400-7407 ISSN：2574-0962
通讯作者：
Luo, Yongfeng(yfluo@csuft.edu.cn)
作者机构：
[Wang, Xiaoman; Deng, Yuanyuan; Wang, Ziheng; Li, Zuwei; Wang, Luchi; Ouyang, Jie; Zhou, Cui; Luo, Yongfeng] Hunan Province Key Laboratory of Materials Surface and Interface Science and Technology, College of Science, Central South University of Forestry and Technology, Changsha;410004, China;[Wang, Xiaoman; Deng, Yuanyuan; Wang, Ziheng; Li, Zuwei; Wang, Luchi; Ouyang, Jie; Zhou, Cui; Luo, Yongfeng] 410004, China
通讯机构：
[Yongfeng Luo] H;Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Science, Central South University of Forestry and Technology, Changsha 410004, P. R. China
摘要：
Wood carbon slices derived from wood scraps for constructing energy storage electrodes are very important, because they have excellent characteristics, such as structural stability, long cycle life, abundant resources and low prices. However, they have low capacitance as electrode materials for supercapacitors. In this paper, we design a new concept to obtain a porous wood carbon electrode with a large specific surface area. Firstly, CO2 is used to activate carbonized wood to open some closed pores and create some new pores. The activated wood is then soaked into KOH solution to further create new pores. Finally, the carbonized wood is modified with HNO3. After the above treatments, the number of nanopores with a diameter of approximately 2 nm is greatly increased within the wood carbon slices, and their specific surface area is increased to 703.5 m(2) g(-1). The single electrode material shows excellent performance with a high specific capacitance of 285.6 F g(-1) and a high energy density of 38.0 mWh cm(-3), which has more than twice the capacitance of the supercapacitor based on biomass carbon materials modified by diluted HNO3. Therefore, the application of wood scraps can meet the basic energy storage needs and realize the waste into treasure.
摘要：
Lenvatinib (LEN), sorafenib (SOR), and sunitinib (SUN) are drugs targeting vascular endothelial growth factor receptor 2 (VEGFR2). Despite sharing similar chemical structures and bioactivities, LEN and SOR bind to different functional states of VEGFR2, viz. DFG-in and DFG-out state, respectively. SUN binds to the DFG-out state of VEGFR2 just like SOR but with less potency. Thus, detail binding mechanisms between VEGFR2 and these drugs, especially dynamic interaction, are valuable for future drug design. In the present work, molecular dynamics simulation, essential dynamic analysis, and molecular mechanics/generalized born surface area were performed to these VEGFR2-drugs systems. Rank of calculated binding affinities is in accordance with the experimental data. The binding free energy calculation suggests that van der Waals interaction plays a vital role in the binding. Per-residue free energy decomposition indicates that residues L840, V848, A866, E885, L889, V899, V916, F918, C919, L1035, C1045, D1046, and F1047 play an important role in the binding between VEGFR2 and LEN/SOR. While residues L840, V848, E917, F918, C919, G922, L1035, and F1047 contribute the major hydrophobic interaction for SUN binding to the receptor. Our results also reveal that residue E885/D1046 plays a vital role in binding via forming hydrogen bonds with drugs.
作者机构：
[Xiong Feng; Luo Yong-Feng; Liao Chun-Rong] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410018, Peoples R China.;[Xiong Feng; Luo Yong-Feng; Liao Chun-Rong] Fudan Univ, Lab Adv Mat, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China.;[Li Xian-Jun; Wu Yi-Qiang] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410018, Peoples R China.
通讯机构：
[Luo Yong-Feng] C;[Luo Yong-Feng] F;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410018, Peoples R China.;Fudan Univ, Lab Adv Mat, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China.
关键词：
Conductive polymer;Fiber;Supercapacitor;Solar cell;Fibrous energy device
摘要：
Conductive polymers implemented in fibrous energy devices have drawn considerable attention because of their economic importance, good environmental stability, and electrical conductivity. Conductive polymers demonstrate interesting mechanical, electronic, and optical properties, controllable chemical and electrochemical behavior, and facile processability. This review elaborates on the latest research in conductive polymers in fibrous energy devices, such as fibrous supercapacitors, fibrous solar cells, and fibrous integrated energy devices. The performance requirements of these fibrous energy devices, with specific reference to related materials, fabrication techniques, fiber structure, and electronic transport as well as mechanical functionality, are also reviewed in this paper.
