通讯机构：
[Zhang, L ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
关键词：
Pretreatment;Acidic deep eutectic solvent;Reed;Microwave
摘要：
The cost-effective and low-carbon fractionation of lignocellulosic biomass will enhance the economic viability of bio-refining. To achieve efficient reed fractionation under favorable conditions, microwave-assisted choline chloride and p-toluene sulfonic acid (M-ChCl/p-TsOH) pretreatment was employed. The fractionation of reed components demonstrated higher effectiveness with M-ChCl/p-TsOH pretreatment compared to conventional DES pretreatment. Under M-ChCl/p-TsOH conditions, a high hemicellulose removal rate (similar to 90%) and delignification rate (similar to 65%) were achieved while achieving a saccharification rate of 88% during cellulase hydrolysis. Microwave assistance not only significantly reduced reaction time to less than 60 s but also enhanced the pretreatment efficacy. Furthermore, the obtained lignin products consisted of low-polymerization lignin (M-W < 800 g/mol) and acid-soluble lignin, providing a solid foundation for subsequent high-value utilization of lignin. This study provides a promising strategy for the low carbon fractionation of reed using DES, aiming to simultaneously achieve efficient cellulose hydrolysis and obtain tractable lignin.
通讯机构：
[Tong, ZH ] G;[Zhang, L] U;[Zhang, L ] C;Cent South Univ Forestry & Technol, Minist Forestry Bioethanol Res Ctr, Changsha 410004, Peoples R China.;Georgia Inst Technol, Renewable Bioprod Inst, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
关键词：
Lignin depolymerization;Heterogeneous photo -Fenton catalyst;Enol ether intermediates;Recyclability;Selective bond cleavage
摘要：
Photocatalysis, which leverages sustainable solar energy to facilitate the conversion of lignin under mild conditions, has gained considerable research interest. Therefore, our study introduces a novel heterogeneous photoFenton reagent, Fe3O4@GO@TiO2, designed to selectively depolymerize lignin into aromatic chemicals using ultraviolet light as the energy source. This ternary photo-Fenton catalyst could effectively depolymerize approximately 90% of lignin model compounds. The model compounds without or with phenolic OH blocking yield guaiacol exclusively and predominantly guaiacol with aromatic aldehydes, respectively. The lignin degradation mechanism using the photo-Fenton catalyst (Fe3O4@GO@TiO2) involves the formation of an enol ether intermediate, followed by the cleavage of lignin beta-O-4 bonds, facilitated by a mild photon-stimulated reduction-oxidation Fenton process. Notably, the reduced GO plays a crucial role in two aspects. Firstly, it transfers and stabilizes the photoexcited electron-hole pairs. Secondly, it promotes the generation of radicals (center dot OH, center dot OOH) essential for selective degradation of the lignin side chains. Consequently, the average molecular weight of the lignin depolymerized product is half of that of the original lignin. Furthermore, this photocatalyst demonstrates recyclability, retaining 85% of its initial activity after five-time recycling. This tertiary Fentonphotocatalyst provides a novel approach for the selective depolymerization of lignin interunit bonds into valuable phenolic monomers under ambient conditions.
期刊：
International Journal of Molecular Sciences,2023年24(3):1979- ISSN：1661-6596
通讯作者：
Yue-Wei Guo<&wdkj&>Lin-Fu Liang
作者机构：
[Ge, Zeng-Yue; Yan, Xian-Yun; Liang, Lin-Fu; Zhang, Ling] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Guo, Yue-Wei; Chen, Zi-Hui; Yang, Min; Li, Song-Wei; Yao, Li-Gong] Chinese Acad Sci, Shanghai Inst Mat Med, State Key Lab Drug Res, 555 Zu Chong Zhi Rd, Zhangjiang Hitech Pk, Shanghai 201203, Peoples R China.;[Guo, Yue-Wei] Bohai Rim Adv Res Inst Drug Discovery, Shandong Lab Yantai Drug Discovery, Yantai 264117, Peoples R China.;[Guo, Yue-Wei] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Druggabil Res Marine Nat Prod, 1 Wenhai Rd, Qingdao 266237, Peoples R China.;[Guo, Yue-Wei] Zhejiang Univ Technol, Collaborat Innovat Ctr Yangtze River Delta Reg Gre, Hangzhou 310014, Peoples R China.
通讯机构：
[Yue-Wei Guo] C;[Lin-Fu Liang] A;Authors to whom correspondence should be addressed.<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China<&wdkj&>Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China<&wdkj&>Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237, China
摘要：
Green and low-cost biomass-based porous carbon adsorbents have a good prospect for the removal of some environmental pollutants. Here, sodium lignosulphonate, chitosan, and activator were firstly combined into wet gel microbeads through in situ self-assembly method, and then derived the novel porous carbon adsorption materials (LC-Cs) by freeze-drying and one-step activation carbonization. The results showed that LC-Cs had large specific surface areas (892.4∼1307.8 m2/g), high microporosity (87.4∼89.2%), and rich nitrogen content (3.01∼4.92%), and these structural parameters showed good linear dependence with the dosage ratio of lignin to chitosan. Next, LC-Cs carbon showed efficient CO2 capture (173.9–215.2 mg/g) and high CO2/N2 selectivity (up to IAST:145.9, Henry’s law: 23.5), specially, the relationships between the CO2 capture and the structural parameters were investigated in detail, and also performed DFT calculation. In addition, LC-C22 had the maximum adsorption capacity of p-nitrophenol (PNP) as 592.8 mg/g, and the adsorption isotherms and kinetic study indicated that they belonged to the multilayer adsorption on the heterogeneous surfaces, and the chemical adsorption played the dominated roles, and then further studied the adsorption mechanism by characterization techniques. This work provided a green and facile strategy for preparing structurally controllable N-doped porous carbon materials, as well as offered good potential adsorbents for PNP removal and CO2 capture.
摘要：
In the face of the current energy and environmental problems, the full use of biomass resources instead of fossil energy to produce a series of high-value chemicals has great application prospects. 5-hydroxymethylfurfural (HMF), which can be synthesized from lignocellulose as a raw material, is an important biological platform molecule. Its preparation and the catalytic oxidation of subsequent products have important research significance and practical value. In the actual production process, porous organic polymer (POP) catalysts are highly suitable for biomass catalytic conversion due to their high efficiency, low cost, good designability, and environmentally friendly features. Here, we briefly describe the application of various types of POPs (including COFs, PAFs, HCPs, and CMPs) in the preparation and catalytic conversion of HMF from lignocellulosic biomass and analyze the influence of the structural properties of catalysts on the catalytic performance. Finally, we summarize some challenges that POPs catalysts face in biomass catalytic conversion and prospect the important research directions in the future. This review provides valuable references for the efficient conversion of biomass resources into high-value chemicals in practical applications.
作者机构：
[Zhan, Peng; Shao, Lishu; Sheng, Zhiyuan; Zhang, Lin; Wu, Zhiping] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Minist Forestry Bioethanol Res Ctr, Changsha 410004, Peoples R China.;[Zhan, Peng; Shao, Lishu; Zhang, Lin; Wu, Zhiping] Cent South Univ Forestry & Technol, Hunan Int Joint Lab Woody Biomass Convers, Changsha 410004, Peoples R China.;[Zhan, Peng; Shao, Lishu; Zhang, Lin; Wu, Zhiping] Cent South Univ Forestry & Technol, Hunan Engn Res Ctr Woody Biomass Convers, Changsha 410004, Peoples R China.
通讯机构：
[Dr. Lishu Shao] M;Ministry of Forestry Bioethanol Research Center, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004 China<&wdkj&>Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004 China<&wdkj&>Hunan Engineering Research Center for Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004 China
摘要：
A series of modified sepiolite supported metal oxide catalysts (MxO/m‐Sep) were prepared by the precipitation method with ultrasonic assistance, and used in the oxidative depolymerization of sodium lignosulfonate (SLS). SLS was depolymerized into valuable esters over these catalysts by O2 in water systems, the selective esters including diethyl maleate (18.41 %) and diethyl succinate (22.91 %) was obtained over CuxO/m‐Sep under the optimal reaction conditions. Abstract The catalytic oxidative depolymerization is one of the main means for lignin depolymerization to produce various value‐added chemicals, such as ketones, aldehydes and organic acids, et al. However, the high‐efficiency cleavage of lignin interlinkage is often challenging due to the high recalcitrance of C−C bonds and the weak activity of catalyst. Herein, a series of modified sepiolite (m‐Sep) supported metal oxide catalysts (MxO/m‐Sep) were prepared by the precipitation method with assistance of ultrasonic wave, and firstly used in the oxidative depolymerization of sodium lignosulfonate (SLS). Three MxO /m‐Sep catalysts (CuxO, CoxO, and FexO) were characterized by SEM, TEM, XRD, N2 adsorption‐desorption, FT‐IR, XPS, and O2‐TPD to study their microstructure and surface chemical state. The effect of the reaction conditions (temperatures, O2 initial pressure, and time) for the oxidative depolymerization of SLS in H2O solvent were investigated over CuxO/m‐Sep catalyst, respectively. Correspondingly, the orthogonal experiment was also performed for obtaining the optimal depolymerization conditions. The results indicated the conversion rate of SLS could reach the highest value of 99.2 wt% under 1 MPa O2 at 210 °C for 4 h, and the optimal yield rate of ethyl acetate‐soluble products (EA‐soluble products) was 11.1 wt%. All these EA‐soluble products were analyzed by GC‐MS, and the selective esters including diethyl maleate (18.41 %) and diethyl succinate (22.91 %) could be obtained over CuxO/m‐Sep catalyst under the optimal reaction conditions. In addition, CoxO/m‐Sep and FexO/m‐Sep also exhibited comparable catalytic performance for SLS. This work developed a new approach for the effective oxidative depolymerization of SLS with low‐cost catalysts and mild conditions, and provided references for the production of lignin‐derived high‐value chemicals.
作者机构：
中南林业科技大学材料科学与工程学院,湖南长沙,410004;国家林业局生物乙醇研究中心,湖南长沙,410004;湖南省木本生物质转化工程技术研究中心,湖南长沙,410004;湖南省木质资源定向转化国际联合实验室,湖南长沙,410004;[詹鹏; 张林; 盛志远; 邵礼书] College of Materials Science and Engineering, Central South University of Forestry and Technology, Hu'nan Province, Changsha, 410004, China, Ministry of Forestry Bioethanol Research Center, Hu'nan Province, Changsha, 410004, China, Hunan Engineering Research Center for Woody Biomass Conversion, Hu'nan Province, Changsha, 410004, China, Hunan International Joint Lab of Woody Biomass Directed Conversion, Hu'nan Province, Changsha, 410004, China
通讯机构：
[Shao, L.] C;College of Materials Science and Engineering, Hu'nan Province, China
通讯机构：
[Chen, JN ; Zhang, L] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Minist Forestry, Bioethanol Res Ctr, Changsha 410004, Peoples R China.;Hunan Int Joint Lab Woody Biomass Convers, Changsha 410004, Peoples R China.
摘要：
Biochar is widely used to remove hexavalent chromium [Cr(VI)] from wastewater through adsorption, which is recognized as a facile, cost-efficient, and high-selectivity approach. In this study, a versatile strategy that combines delignification with subsequent carbonization and KOH activation is proposed to prepare a novel woody biochar from waste poplar sawdust. By virtue of the unique multilayered and honeycomb porous structure induced by delignification and activation processes, the resultant activated carbonized delignified wood (ACDW) exhibits a high specific surface area of 970.52 m(2) g(-1) with increasing meso- and micropores and abundant oxygen-containing functional groups. As a benign adsorbent for the uptake of Cr(VI) in wastewater, ACDW delivers a remarkable adsorption capacity of 294.86 mg g(-1) in maximum, which is significantly superior to that of unmodified counterparts and other reported biochars. Besides, the adsorption behaviors fit better with the Langmuir isotherm, the pseudo-second-order kinetic model, and the adsorption diffusion model in batch experiments. Based on the results, we put forward the conceivable adsorption mechanism that the synergistic contributions of the capillary force, electrostatic attraction, chemical complexation, and reduction action facilitate the Cr(VI) capture by ACDW.
作者：
Bu, Qing;Yang, Min;Yan, Xian-Yun;Li, Song-Wei;Ge, Zeng-Yue;...
期刊：
Marine Drugs,2022年20(9):566- ISSN：1660-3397
通讯作者：
Yue-Wei Guo<&wdkj&>Lin-Fu Liang
作者机构：
[Ge, Zeng-Yue; Yan, Xian-Yun; Liang, Lin-Fu; Zhang, Ling; Bu, Qing] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, 498 South Shaoshan Rd, Changsha 410004, Peoples R China.;[Guo, Yue-Wei; Yang, Min; Li, Song-Wei; Yao, Li-Gong] Chinese Acad Sci, Shanghai Inst Mat Med, State Key Lab Drug Res, 555 Chong Zhi Rd,Zhangjiang Hitech Pk, Shanghai 201203, Peoples R China.;[Guo, Yue-Wei] Bohai Rim Adv Res Inst Drug Discovery, Shandong Lab Yantai Drug Discovery, Yantai 264117, Peoples R China.;[Guo, Yue-Wei] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Druggabil Res Marine Nat Prod, 1 Wenhai Rd, Qingdao 266237, Peoples R China.;[Guo, Yue-Wei] Zhejiang Univ Technol, Collaborat Innovat Ctr Yangtze River Delta Reg Gr, Hangzhou 310014, Peoples R China.
通讯机构：
[Yue-Wei Guo] C;[Lin-Fu Liang] A;Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China<&wdkj&>Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China<&wdkj&>Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China
作者机构：
[Deng, Zhijie; Wei, Song; Wu, Yiqiang; Wan, Caichao; Su, Jiahui; Zhang, Luyu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Yong, Ken-Tye] Univ Sydney, Sch Biomed Engn, Sydney, NSW 2006, Australia.
通讯机构：
[Caichao Wan; Yiqiang Wu] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China
期刊：
International Journal of Biological Macromolecules,2022年221:25-37 ISSN：0141-8130
通讯作者：
Shao, Lishu
作者机构：
[Zhan, Peng; Wan, Huan'ai; Liu, Na; Shao, Lishu; Wu, Zhiping; Zhang, Lin] Cent South Univ Forestry & Technol, Minist Forestry Bioethanol Res Ctr, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.;[Zhan, Peng; Liu, Na; Shao, Lishu; Wu, Zhiping; Zhang, Lin] Cent South Univ Forestry & Technol, Hunan Int Joint Lab Woody Biomass Convers, Changsha 410004, Peoples R China.;[Sun, Fubao; Wang, Chen] Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol, Minist Educ, Wuxi 214122, Peoples R China.
通讯机构：
[Lishu Shao] M;Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China
摘要：
A series of lignin modified hyper-cross-linked nanoporous resins (LMHCRs) had been synthesized from lignin, 4-vinylbenzyl chloride, and divinylbenzene by free radical polymerization reaction and following Friedel-Crafts reaction. The results indicated that Brunauer-Emmett-Teller surface area (SBET) of LMHCRs decreased with different degrees compared with polymeric microspheres (HCRs) without adding lignin. With increasing the feeding amount of lignin, the SBET of LMHCRs first increased and then decreased, and LMHCR-2 had larger SBET (968.52 m2/g) and average pore size (DA: 2.51 nm). Meanwhile, their contact angle continuously decreased from 92.10 to 71.30, indicating the enhanced polarity. Interestingly, the adsorption capacity of p-nitrophenol (PNP) on all LMHCRs were obviously higher than rhodamine B, and LMHCR-2 had the largest capacity ratio (3.780) of PNP to rhodamine B or other organic dyes at 298 K. Specifically, the Qm of PNP on LMHCR-2 reached the largest value (492.1 mg/g) due to its suitable porosity and favorable surface polarity. LMHCR-2 also displayed excellent CO2 capture (86.5 mg/g) at 273 K and 1 bar and good reusability. This study provided an efficient route to modify hyper-cross-linked resin by using the residual lignin, and showed the enhanced adsorption performance.
作者机构：
[万欢爱; 邵礼书; 刘娜; 毛莉; 张林; 詹鹏; 陈介南] College of Materials Science and Engineering, Central South University of Forestry and Technology, Hunan, Changsha;410004, China;Administration of National Forestry and Grassland Bioethanol Research Center, Central South University of Forestry and Technology, Hunan, Changsha;[万欢爱; 邵礼书; 刘娜; 张林; 詹鹏; 陈介南] 410004, China<&wdkj&>Administration of National Forestry and Grassland Bioethanol Research Center, Central South University of Forestry and Technology, Hunan, Changsha;[万欢爱; 邵礼书; 刘娜; 毛莉; 张林; 詹鹏; 陈介南] 410004, China
通讯机构：
[Jienan Chen] M;[Xiaoxun Zhou] C;College of Public Administration and Law, Human Agricultural University, Changsha, 410128, China<&wdkj&>Ministry of Forestry Bioethanol Research Center, Changsha, 410004, China<&wdkj&>Hunan International Joint Laboratory of Woody Biomass Conversion, Changsha, 410004, China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
摘要：
Creation of eco-friendly and high-performance nanocomposites has become one of the most widely concerned focuses. Regenerated cellulose aerogels (RCAs), the typical green sustainable 3D cellulose products, have numerous merits including large surface area, high porosity, low density, high mechanical strength, 3D network structure and abundant oxygen-containing groups, which make them ideal candidates as green matrices to support various active nanomaterials for the development of novel functional nanocomposites. Therefore, RCAs open up a new promising avenue to create novel enticing materials with desired and tunable properties. Also, it is of great significance to search exact modification or adulteration technologies to create RCAs-based nanocomposites for advanced applications. In addition, to make RCAs more applicable and valuable, a deep understanding of the relationship between the structure (mainly dependent on the dissolution, regeneration and drying techniques) and property of RCAs is also necessary. Here, this review article highlights recent advances in the field of RCAs-based functional nanocomposites. The synthetic processes and mechanisms and representative physicochemical properties are also emphasized. We hope that this review work could play a certain guiding role for the study and creation of green RCAs-based functional materials and stimulate a wider range of studies and collaborations, leading to significant progress in this area.
