作者： Jia, Shanshan;Deng, Songlin;Qing, Yan*;He, Guanjie;Deng, Xunhe;...

期刊： Chemical Engineering Journal,2021年410:128418 ISSN：1385-8947

通讯作者： Qing, Yan;Lu, Yao;Parkin, Ivan P.

作者机构： [Qing, Y; Lu, Y; Parkin, IP; Wu, Yiqiang; Deng, Songlin; Deng, Xunhe; Luo, Sha; Qing, Yan; Jia, Shanshan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Guo, Jian; Carmalt, Claire J.; Parkin, Ivan P.; He, Guanjie; Jia, Shanshan] UCL, Dept Chem, 20 Gordon St, London WC1H 0AJ, England.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Peoples R China.;[Lu, Yao] Queen Mary Univ London, Sch Biol & Chem Sci, Dept Chem, Mile End Rd, London E1 4NS, England.

通讯机构： [Qing, Y; Lu, Y; Parkin, IP] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Harsh environment applications;High sensing performance;Microliter droplets sensing;Robustness;Superhydrophobic;Wearable sensor

摘要： Traditional waterproofing strategies (e.g. plastic seals, superhydrophobic coatings) of strain sensors greatly limit their sensing performance (e.g., sensitivity, working-range, and working-life). Here a unique ultra-stretchable, coating-free superhydrophobic material is developed for high-performence strain sensing in harsh environments. This material integrates high sensitivity (GF of 2.1 to 214), wide sensing range (up to 447% strain), low resolution (<0.2% strain), dynamic durability (over 10,000 stretching cycles at 50% strain), and ultra-robust superhydrophobicity (mechanically, chemically, thermally, and UV impervious) in a single system, outperforming most of reported waterproof sensors. Such remarkable sensing materials can detect full range human movement, pulse rate and vocal fold vibration. The sensing material is designed to be superhydrophobic throughout its bulk material for work in harsh environments (water, corrosive liquid, high humidity, etc.). More importantly, the superhydrophobicity enables the highly sensitive sensor to detect microliter droplets impact with minimized energy loss. Thus, this sensing material should find many potential applications in wearable electronics, measurement platform, rainfall monitoring and intelligent irrigation system. © 2021

语种： 英文

作者： Zhao, Dawei;Zhu, Ying;Cheng, Wanke;Chen, Wenshuai;Wu, Yiqiang*;...

期刊： Advanced Materials,2021年33(28):2000619- ISSN：0935-9648

通讯作者： Yu, Haipeng;Wu, Yiqiang

作者机构： [Zhu, Ying; Yu, Haipeng; Cheng, Wanke; Zhao, Dawei; Chen, Wenshuai] Northeast Forestry Univ, Minist Educ, Key Lab Biobased Mat Sci & Technol, Harbin 150040, Peoples R China.;[Zhao, Dawei] Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China.;[Wu, Yiqiang] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Peoples R China.

通讯机构： [Yu, Haipeng] N;[Wu, Yiqiang] C;Northeast Forestry Univ, Minist Educ, Key Lab Biobased Mat Sci & Technol, Harbin 150040, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Changsha 410004, Peoples R China.

关键词： cellulose;energy storage systems;flexible electronics;nanomaterials;sensors

摘要： There is currently enormous and growing demand for flexible electronics for personalized mobile equipment, human–machine interface units, wearable medical-healthcare systems, and bionic intelligent robots. Cellulose is a well-known natural biopolymer that has multiple advantages including low cost, renewability, easy processability, and biodegradability, as well as appealing mechanical performance, dielectricity, piezoelectricity, and convertibility. Because of its multiple merits, cellulose is frequently used as a substrate, binder, dielectric layer, gel electrolyte, and derived carbon material for flexible electronic devices. Leveraging the advantages of cellulose to design advanced functional materials will have a significant impact on portable intelligent electronics. Herein, the unique molecular structure and nanostructures (nanocrystals, nanofibers, nanosheets, etc.) of cellulose are briefly introduced, the structure–property–application relationships of cellulosic materials summarized, and the processing technologies for fabricating cellulose-based flexible electronics considered. The focus then turns to the recent advances of cellulose-based functional materials toward emerging intelligent electronic devices including flexible sensors, optoelectronic devices, field-effect transistors, nanogenerators, electrochemical energy storage devices, biomimetic electronic skins, and biological detection devices. Finally, an outlook of the potential challenges and future prospects for developing cellulose-based wearable devices and bioelectronic systems is presented. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

语种： 英文

作者： Xu, Han;Liao, Yu;Gao, Zhifei;Qing, Yan;Wu, Yiqiang;...

期刊： Journal of Materials Chemistry A,2021年9(6):3418-3426 ISSN：2050-7488

通讯作者： Xia, Liaoyuan

作者机构： [Xu, Han; Wu, Yiqiang; Liao, Yu; Xia, Liaoyuan; Qing, Yan; Gao, Zhifei] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci &, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Xia, Liaoyuan] C;Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci &, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

摘要： Design and fabrication of high-efficiency electrocatalysts are important to generate hydrogenviaurea electrocatalysis with the minimum required energy. In this study,in situgrowth of a branch-like Mo-doped Ni3S2nanoforest on Ni foam was achieved through a facile one-pot hydrothermal process. The as-obtained catalyst exhibited excellent activity and robust durability because of its unique hierarchical nanostructures and doping-optimized electronic structural configuration, and required merely 1.33 V (vs.RHE) and 90 mV (overpotential) to attain a current density of 10 mA cm−2for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER), without any noticeable loss in activity even after 120 h of operation. On the basis of the experimental results and theoretical calculations, it was confirmed that the incorporation of Mo in Ni3S2altered the morphology and electronic structure of the catalyst; hence, more active sites were exposed and the Gibbs adsorption energy of the intermediates in the UOR was optimized. Notably, the overall urea electrolysis cell could afford a low voltage of 1.45 V (vs.RHE) to attain a current density of 10 mA cm−2and showed excellent durability over 120 h. The findings from this study provide new insights into efficient electrocatalysts for urea electrolyzers, which hold great potential in electrochemical energy conversion and sewage treatment applications. © The Royal Society of Chemistry 2021.

语种： 英文

作者： Liu, Xinyi;Wan, Caichao*;Li, Xianjun;Wei, Song;Zhang, Luyu;...

期刊： 环境科学与工程前沿(英文),2021年15(4):54-null ISSN：2095-2201

通讯作者： Wan, Caichao;Li, Jian

作者机构： [Wei, Song; Wu, Yiqiang; Wan, Caichao; Tian, Wenyan; Li, Xianjun; Liu, Xinyi; Zhang, Luyu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Li, Jian] Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.;[Yong, Ken-Tye] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore.;[Wan, Caichao] Yihua Lifestyle Technol Co Ltd, Shantou 515834, Peoples R China.

通讯机构： [Wan, Caichao] C;[Li, Jian] N;[Wan, Caichao] Y;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.

关键词： Wood;Nanocatalysts;Photodegradation;Organic contaminants;Composites

摘要： Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years, because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these materials. Herein, we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic pollutants. This review begins with a brief introduction of the development of photocatalysts and hierarchical structure of wood. The review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants (such as 1D fiber, 2D films and 3D porous gels) using advanced nanotechnology including sol-gel method, hydrothermal method, magnetron sputtering method, dipping method and so on. Next, we highlight typical approaches that improve the photocatalytic property, including metal element doping, morphology control and semiconductor coupling. Also, the structure-activity relationship of photocatalysts is emphasized. Finally, a brief summary and prospect of wood-derived photocatalysts is provided. [Figure not available: see fulltext.]. © 2020, Higher Education Press.

语种： 英文

作者： Xu, Kang;Yuan, Shaofei;Gao, Yulei;Wu, Yiqiang;Zhang, Jian;...

期刊： Drying Technology,2021年39(6):791-802 ISSN：0737-3937

通讯作者： Li, Xianjun;Lu, Jianxiong

作者机构： [Li, XJ; Lu, JX; Wu, Yiqiang; Lu, Jianxiong; Xu, Kang; Li, Xianjun] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Zhang, Jian; Xu, Kang; Yuan, Shaofei] Zhejiang Acad Forestry, Hangzhou, Peoples R China.;[Gao, Yulei; Lu, Jianxiong] Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China.

通讯机构： [Li, XJ; Lu, JX] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： drying rate;low-field nuclear magnetic resonance (LF-NMR);moisture content profiles;resin curing;Resin-modified wood;spin–spin relaxation time

摘要： In this study, the spin–spin relaxation time (T2) distributions of free water and bound water, as well as the moisture content (MC) profiles of MUF resin-impregnated poplar wood (Populous tomentosa) sample (RI) were investigated by low-field nuclear magnetic resonance, with the aim of providing insights into how MUF resin impregnation affects the moisture states and moisture transport in modified poplar wood during drying. The T2 curves demonstrated that the resin treatment did not increase the number of peaks in the T2 distributions, but affected the T2 value as compared to the control. Above the fiber saturation point (FSP), the T22 (corresponds to the free water in wood rays and wood fibers) of the RI sample exhibited an increase compared to the control, while the T23 (corresponds to the free water in the vessels) was almost unchanged. Below the FSP, a shorter T21 (corresponding to the bound water) of the RI sample was observed compared to the control. The drying curves and MC profiles indicated a significant difference in the moisture transport in the RI sample as compared to the control. The gradually cured resin system in the wood surface layer during drying provided a barrier for the transfer of water in the center layer toward to the surface, causing the resin curing reactions in the surface and core layers to be out of sync. Therefore, a more significant MC gradient was observed for the resin-impregnated sample. © 2020 Taylor & Francis Group, LLC.

语种： 英文

作者： Wang, Zhiqi;Cheng, Fangchao;Cai, Hangchuan;Li, Xiurong;Sun, Jianping;...

期刊： Carbohydrate Polymers,2021年259:117753 ISSN：0144-8617

通讯作者： Cheng, Fangchao(fangchaocheng@gxu.edu.cn)

作者机构： [Wang, Zhiqi; Sun, Jianping; Cheng, Fangchao; Cai, Hangchuan; Li, Xiurong] Guangxi Univ, Sch Resources Environm & Mat, Guangxi Key Lab Proc Nonferrous Metall & Featured, Nanning 530004, Peoples R China.;[Wu, Yiqiang; Cheng, Fangchao] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Nannan] Guangxi Univ, Sch Resources Environm & Mat, GIFT Guangxi Inst Fullerene Technol, Nanning 530004, Guangxi, Peoples R China.;[Zhu, Yanqiu] Univ Exeter, Coll Engn Math & Phys Sci, Exeter EX4 4SB, Devon, England.

通讯机构： [Cheng, F.] G;Guangxi Key Laboratory of Processing for Nonferrous Metallic and Featured Materials, China

关键词： Biological–mechanical sensing;Biomass-based hydrogel;In-situ hydrothermal synthesis;Multifunctionality;Self-healing

摘要： A new type of nanocellulose/poly(vinyl alcohol)/carbon dot (NPC) multifunctional hydrogel was successfully fabricated by an one-step in-situ hydrothermal method. The one-pot strategy led to the formation of a complex hydrogen bonding/dynamic boric acid ester/nitrogen-doped carbon dots network, and endowed the hydrogel with multifunctionality. The hydrogel underwent self-healing at room temperature (25 °C) and exhibited double-emission fluorescence and high mechanical strength (tensile strength of up to 2.98 MPa). An NPC hydrogel-based capacitive sensor exhibited remarkable linear capacitance responsiveness toward pressure, strain, and glucose concentration, and enabled real-time synchronous quantitative pressure/glucose sensing with multiple linear correlations, which was a key performance criteria for biomechanical sensors. The versatility and multiple advantages of the as-prepared hydrogel demonstrate the potential of biological–mechanical sensing materials using natural cellulosic biomass. © 2021 Elsevier Ltd

语种： 英文

作者： Yuan, Hanmeng;Peng, Junwen;Ren, Tingting;Luo, Qiuyan;Luo, Yong;...

期刊： Science of The Total Environment,2021年760:143395 ISSN：0048-9697

通讯作者： Guo, Xin;Wu, Yiqiang

作者机构： [Ren, Tingting; Peng, Junwen; Luo, Qiuyan; Luo, Yong; Guo, Xin; Yuan, Hanmeng; Zhang, Ning] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;[Huang, Yong] Nanjing Forestry Univ, Coll Mat Sci & Engn, Joint Int Res Lab Biomass Energy & Mat, Nanjing 210037, Peoples R China.;[Wu, Yiqiang; Peng, Junwen] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Guo, Xin; Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Adsorption;Carbon dots;Cr(VI);Detection;Lignin

摘要： A novel fluorescent lignin-based hydrogel with cellulose nanofibers and carbon dots (CDs) was synthesized for the high-value utilization of lignin and control of hexavalent chromium(Cr(VI)). Its chemical and physical structure was characterized, and its Cr(VI) sorption performance was evaluated. The results demonstrated that 3D porous structures were constructed in this hydrogel. The maximum adsorption capacity of this hydrogel was 599.9 mg/g, and its sorption performance met Freundlich and pseudo-second-order models. Meanwhile, this novel hydrogel exhibited high sensitivity to Cr(VI), with a limit of detection of 11.2 mg/L and a wide linear range from15 to 200 mg/L. Moreover, itsmechanismfor efficiently adsorbing and detecting Cr(VI) was analyzed. The results confirmed that the efficient adsorption and detection were due to these 3D porous structures generated by the lignin and cellulose nanofibers modified with CDs. The porous structures providedmany active sites and ion transport channels, thereby improving the adsorption, and stabilized the fluorescence signal, thus enhancing the detection. (C) 2020 Elsevier B.V. All rights reserved.

语种： 英文

作者： Luo, Qiuyan;Huang, Xiaohui;Luo, Yong;Yuan, Hanmeng;Ren, Tingting;...

期刊： Chemical Engineering Journal,2021年407:127050 ISSN：1385-8947

通讯作者： Guo, Xin;Wu, Yiqiang

作者机构： [Ren, Tingting; Luo, Qiuyan; Luo, Yong; Guo, Xin; Yuan, Hanmeng] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;[Huang, Xiaohui] Hunan Edible Fungi Inst, Changsha 410004, Peoples R China.;[Wu, Yiqiang; Li, Xianjun] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Xu, Dong] Cent South Univ Forestry & Technol, Coll Food Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Guo, Xin; Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Adsorption;Carbon dots;Chitosan;Cr(VI);Detection

摘要： To deal with heavy metal pollution, a novel fluorescent chitosan-based hydrogel incorporating titanate and cellulose nanofibers modified with carbon dots was prepared to effectively detect and remove Cr(VI). The composition and structure of this chitosan-based hydrogel were analyzed. The performance of the fluorescent chitosan-based hydrogel in Cr(VI) adsorption was evaluated through a contrast experiment with the normal chitosan hydrogel without carbon dots. The results showed that the fluorescent chitosan-based hydrogel had a higher adsorption ability of Cr(VI) (maximum adsorption capacity, 228.2 mg g−1). The effect of the initial concentration of Cr(VI) and the contact time were also evaluated. The results confirmed that the adsorption isotherm was according to the Langmuir model, and the adsorption kinetics followed the pseudo-second-order model. Furthermore, as a fluorescent sensor for Cr(VI), the detection sensitivity and selectivity were examined. The quantitative detection of Cr(VI) was achieved in the linear range of 10–80 mg L−1. Furthermore, for this fluorescent chitosan-based hydrogel, the mechanism for highly efficient adsorption and detection of Cr(VI) was analyzed via FTIR and XPS. These results showed that the excellent sorption and sensing abilities of Cr(VI) may be mainly attributed to the porous structures and the additional titanate and cellulose nanofibers modified with carbon dots improving sorption ability of Cr(VI) and providing a rapid visual response to Cr(VI). © 2020 Elsevier B.V.

语种： 英文

作者： Yi, Jianan;Qing, Yan;Wu, ChuTian;Zeng, Yinxiang;Wu, Yiqiang*;...

期刊： Journal of Power Sources,2021年481:228879 ISSN：0378-7753

通讯作者： Wu, Yiqiang;Lu, Xihong

作者机构： [Wu, Yiqiang; Yi, Jianan; Qing, Yan] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Wu, ChuTian] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, Wuhan 430074, Hubei, Peoples R China.;[Tong, Yexiang; Zeng, Yinxiang; Lu, Xihong] Sun Yat Sen Univ, Sch Chem, KLGHEI Environm & Energy Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Peoples R China.

通讯机构： [Wu, Yiqiang] C;[Lu, Xihong] S;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;Sun Yat Sen Univ, Sch Chem, KLGHEI Environm & Energy Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Peoples R China.

摘要： The authors regret Fig. 3C in the original manuscript should be revised because the ZCC data in the figure was misused as PCC data when plotting. The revised Fig. 3C is presented below. [Figure presented] (Original version) Fig. 3C. Raman spectra of CC, PCC, ZCC and PZCC samples. [Figure presented] (Revised version) Fig. 3C. Raman spectra of CC, PCC, ZCC and PZCC samples. The authors would like to apologise for any inconvenience caused. © 2020 Elsevier B.V.

语种： 英文

作者： Li, Ping;Zhang, Yuan;Zuo, Yingfeng*;Wu, Yiqiang;Yuan, Guangming;...

期刊： Holzforschung,2021年75(2):126-137 ISSN：0018-3830

通讯作者： Zuo, Yingfeng;Lu, Jianxiong

作者机构： [Zuo, YF; Lu, JX; Wu, Yiqiang; Yuan, Guangming; Li, Ping; Zuo, Yingfeng; Zhang, Yuan; Lu, Jianxiong] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Lu, Jianxiong] Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China.;[Li, Ping] Xiangnan Univ, Coll Art & Design, Chenzhou 423000, Hunan, Peoples R China.

通讯机构： [Zuo, YF; Lu, JX; Lu, Jianxiong] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China.

关键词： Bending strength;Chemical analysis;Chemical stability;Compressive strength;Crosslinking;Crystallinity;Decomposition;Fourier transform infrared spectroscopy;Hydrogen bonds;Impregnation;Reinforcement;Silicates;Smoke;Sodium compounds;Sulfur compounds;Thermodynamic stability;Thermogravimetric analysis;Water hardness;Chemical cross-linking;Crystalline structure;Fourier transform infra red (FTIR) spectroscopy;Heat Release Rate (HRR);Smoke production rate;Thermal decomposition temperature;Transverse permeability;Weight percentage gains;Wood;Chinese;Fires;Flames;Impregnation;Release;Smoke;Thermal Stability;Wood

摘要： Inorganic impregnation strengthening of Chinese fir wood was carried out to improve the strength, dimensional stability, flame retardancy, and smoke suppression of Chinese fir wood. Sodium silicate was used as reinforcement, a sulfate and phosphate mixtures were used as a curing agent, and Chinese fir wood was reinforced by the respiratory impregnation method (RIM) that imitating human respiration and vacuum progressive impregnation method (VPIM). The weight percentage gain (WPG), density increase rate, distribution of modifier, bending strength (BS), compressive strength (CS), hardness, and water resistance of unreinforced Chinese fir wood from the VPIM and RIM were compared. It was found that RIM could effectively open the aspirated pits in Chinese fir wood, so its impregnation effect, strengthen effect and dimension stabilization effects were the best. RIM-reinforced Chinese fir wood was filled with silicate both horizontally and vertically. At the same time, the transverse permeability of silicate through aspirated pits was significantly improved. The chemical structure, crystalline structure, flame retardancy, smoke suppression, and thermal stability of VPIM- and RIM-reinforced Chinese fir wood were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), cone calorimeter (CONE), and thermogravimetric analysis (TGA). The results indicated that although the crystallinity of RIM-reinforced Chinese fir wood decreased the most, more chemical crosslinking and hydrogen bonding were formed in the wood, and the strengthen effect was still the best. Compared with VPIM-reinforced Chinese fir wood, RIM-reinforced Chinese fir wood had lower heat release rate (HRR), peak-HRR, mean-HRR, total heat release (THR), smoke production rate (SPR), and total smoke production (TSP), higher thermal decomposition temperature and residual rate. It was indicated that RIM-reinforced Chinese fir wood was a better flame retardant, and has a smoke suppression effect, thermal stability, and safety performance in the case of fire. © 2020 Walter de Gruyter GmbH, Berlin/Boston 2020.

语种： 英文

作者： Luo, Qiuyan;Yuan, Hanmeng;Zhang, Min;Jiang, Ping;Liu, Ming;...

期刊： Journal of Hazardous Materials,2021年401:123432 ISSN：0304-3894

通讯作者： Guo, Xin

作者机构： [Luo, Qiuyan; Guo, Xin; Yuan, Hanmeng] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.;[Liu, Ming; Wu, Yiqiang; Jiang, Ping; Zhang, Min] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Xu, Dong] Cent South Univ Forestry & Technol, Coll Food Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Guo, Xin] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.

关键词： Absorption spectroscopy;Cellulose nanocrystals;Fluorescence;Fourier transform infrared spectroscopy;Hazards;Hydrogels;Optical properties;Photoluminescence spectroscopy;Scanning electron microscopy;Sorption;Adsorption kinetics;Cellulose nanofibers;Chemical compositions;Crystalline structure;Pseudo-second order model;Sorption capacities;Sorption properties;VIS absorption spectroscopy;Chromium compounds;carbon;cellulose;chromium;fluorescent dye;hydrogel;quantum dot;carbon;chemical composition;chromium;gel;hazardous waste;sorption;absorption;adsorption;adsorption kinetics;Article;binding site;chemical composition;chemical structure;crystal structure;ecotoxicology;electron;Fourier transform infrared spectroscopy;isotherm;optics;photoluminescence;polymerization;porosity;quantum yield;scanning electron microscopy;synthesis;ultraviolet visible spectroscopy;X ray diffraction

摘要： To effectively detect and remove environmentally hazardous Cr(VI), a novel 3D porous fluorescent hydrogel was synthesised using amino-modified carbon dots and cellulose nanofibers. The synthesised fluorescent hydrogel was characterized to determine its morphology, crystalline structure, chemical composition and optical property using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, UV–vis absorption spectroscopy and photoluminescence spectroscopy. The sorption properties of the synthesised fluorescent hydrogel were further analyzed. The maximum sorption capacity for Cr(VI) reached 534.4 mg/g, the adsorption isotherm was well fitted using Langmuir model, and the adsorption kinetics were well fitted using a pseudo-second-order model. The sensing ability of the synthesized hydrogel for Cr(VI) was also determined. Furthermore, the mechanism of Cr(VI) sorption and sensing was determined. Accordingly, this novel 3D porous fluorescent hydrogel was identified to be a promising sorbent with advantages of excellent sorption and sensing abilities for environmentally hazardous Cr(VI). © 2020 Elsevier B.V.

语种： 英文

作者： Xu, Han;Qing, Yan;Xiong, Fuquan*;Wu, Yiqiang*

期刊： Journal of Porous Materials,2021年28(2):337-344 ISSN：1380-2224

通讯作者： Xiong, Fuquan;Wu, Yiqiang

作者机构： [Xu, Han; Wu, Yiqiang; Xiong, Fuquan; Qing, Yan; Xiong, FQ] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Xiong, FQ; Wu, YQ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Lignin;Hierarchical porous carbon;Pd nanoparticles;Electrocatalyst

摘要： Herein, lignin derived hierarchical porous carbon (LHPC) supported Pd nanoparticles (Pd/LHPC) were synthesized and developed as advanced electrocatalysts for ethanol oxidation. In the Pd/LHPC, the special hierarchical porous carbon with the interconnected micropores and mesopores uniformly distribute on the surface and walls of macropores can provide facile transport for electroactive species and more reaction available surface. The Pd/LHPC exhibits larger specific electrochemically active surface area, higher electrocatalytic activity and better stability toward the oxidation of ethanol than the black carbon (Vulcan XC-72) supported Pd (Pd/XC-72) and commercial Pd/C electrocatalysts. The strategy reported will open a new road to effectively use industrial waste to synthesize advanced carbon material for efficient electrocatalysts and other electrochemical energy-conversion devices. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

语种： 英文

作者： Yang, Kai;Li, Xingong;Wu, Yiqiang;Zheng, Xia*

期刊： European Journal of Wood and Wood Products,2021年79(5):1049-1055 ISSN：0018-3768

通讯作者： Zheng, Xia

作者机构： [Li, Xingong; Wu, Yiqiang; Yang, Kai; Zheng, Xia] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Zheng, Xia] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

摘要： The bamboo scrimber has been widely used in building materials and interior decoration. However, the bamboo scrimber is very vulnerable to mold due to the rich nutrients in bamboo parenchyma cells. In this study, a thermal treatment with saturated vapor was employed to improve the mold-proof property of bamboo scrimber. Four kinds of mold (Botryodiplodia theobromae, Aspergillus niger, Penicillium citrinum, Trichoderma viride) were respectively used to infect the original bamboo scrimber (OBS) and thermally treated bamboo scrimber (TBS). The TBS presents better mold-proof propertythan the OBS, especially to T. viride. After 28-day infection, the TBSs infected area ratio reached 10.3 % with a remarkable decline compared with the OBS (45 %). In addition, no obvious discoloration was observed on the TBS after infection by B. theobromae. The obtained results show that the degradation of hemicellulose in bamboo bundles during thermal treatment mainly contributes to the enhancement of mold-proof property. The TBSs enhanced hydrophobicity also takes responsibility for slowing down the growth of mycelium. This study exhibits a simple, green and cost-effective method to effectively improve the mold-proof property for the bamboo scrimber without any extra mold inhibitors. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.

语种： 英文

作者： Deng, Songlin;Jia, Shanshan;Deng, Xunhe;Qing, Yan;Luo, Sha;...

期刊： Chemical Engineering Journal,2021年416:129078 ISSN：1385-8947

通讯作者： Qing, Yan(qingyan0429@163.com)

作者机构： [Wu, Yiqiang; Deng, Songlin; Deng, Xunhe; Luo, Sha; Qing, Yan; Jia, Shanshan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

通讯机构： [Yan Qing; Yiqiang Wu] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China

关键词： Hydroxyl groups;Intermolecular forces;Island-like structure;Superhydrophobicity

摘要： Island-like structure induced by hydroxyl groups has been demonstrated to pose significant influence on tuning surface morphology and wettability. Herein, with an intention to better understand this structural transformation, hydroxyl groups both from nanoparticles and substrates were controlled during the thermally-driven deposition procedure. The results show that hydroxyl groups originated from nanoparticles facilitate the fabrication of island-like structure, while these groups from substrates confine. Representatively, hydroxyl-rich TiO2 nanoparticles prefer to generate island-structure and lead to a higher water contact angle, yet hydroxyl-poor copper substrates enable the fabrication of such structure. Morphology observation convinces that nanoparticles abounded with hydroxyl groups were preliminarily grown into larger-size clusters in starting emulsion due to strong intermolecular forces, which contributes to the structural transformation from incompact layer-like to island-like. Meanwhile, the hydroxyl groups in substrates promote the uniform distribution of nanoparticles due to strong hydrogen bonding, which results in a dense and continuous layer-like surface structure. As the island-like structure improves the superhydrophobicity and bonding strength between interfaces, the surfaces with this morphology present high performances. Differing from previous findings, this work will open a new insight into the transformation of island-like structure driven by hydroxyl groups, and afford an alternative strategy to optimize the design of high-performance superhydrophobic surfaces. © 2021 Elsevier B.V.

语种： 英文

作者： Wan, Caichao;Tian, Wenyan;Zhou, Jianbo*;Qing, Yan;Huang, Qiongtao;...

期刊： Materials & Design,2021年198:109309 ISSN：0264-1275

通讯作者： Zhou, Jianbo

作者机构： [Wei, Song; Wu, Yiqiang; Zhou, Jianbo; Wan, Caichao; Tian, Wenyan; Li, Xianjun; Qing, Yan; Liu, Xinyi; Zhang, Luyu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Zhou, Jianbo] Chinese Acad Forestry, Inst New Forest Technol, Beijing 100091, Peoples R China.;[Huang, Qiongtao; Wan, Caichao] Yihua Lifestyle Technol Co Ltd, Shantou 515834, Peoples R China.

通讯机构： [Zhou, Jianbo] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Anisotropy;Cathodes;Copper oxides;Electrochemical electrodes;Electrolytes;Metals;Stability;Supercapacitor;Capacitance retention;Electrical conductivity;Electrochemical performance;Fast transport channels;High energy densities;Hybrid supercapacitors;Specific capacitance;Structural stabilities;Capacitance

摘要： Metallic oxides are promising electrochemically active materials which can supply large energy density and capacitance, while always suffer from weak electrical conductivity and structural stability. Herein, a green and low-tortuosity wood-derived anisotropic carbon is developed to stabilize CuO and improve its conductivity. The low tortuosity and large surface area of anisotropic carbon is capable to act as an electrolyte storage to supply fast transport channels for the ionic migration, which is verified by the kinetic analysis. As expected, the composite electrode has superior electrochemical performances with a large specific capacitance of 694.8 F g−1 at the current density of 0.5 A g−1 (131.5% and 344.2% higher than that of the individual CuO (300.1 F g−1) and the individual carbon (156.4 F g−1)) and high cycling stability. As the current density dramatically increases 100 times to 50 A g−1, the composite electrode still retains 46.7% of the original capacitance, reflecting its outstanding rate capability. More importantly, the composite acts as an advanced cathode material to assemble hybrid supercapacitors, possessing a high cell voltage of 1.5 V and good cycling stability (91.2% capacitance retention after 5000 cycles) and high energy density (13.6 W h kg−1 at 350.3 W kg−1). © 2020 The Authors

语种： 英文

作者： 王健;吴义强;李贤军;左迎峰

期刊： 林产工业,2021年58(01):1-5 ISSN：1001-5299

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;湖南省农林工业勘察设计研究总院,湖南 长沙 410004;农林生物质绿色加工技术国家地方联合工程研究中心,湖南 长沙 410004;[吴义强; 李贤军; 左迎峰] 中南林业科技大学材料科学与工程学院<&wdkj&>农林生物质绿色加工技术国家地方联合工程研究中心;[王健] 中南林业科技大学材料科学与工程学院<&wdkj&>湖南省农林工业勘察设计研究总院

关键词： 秸秆人造板;稻草秸秆;小麦秸秆;畜牧养殖;能源转化;工业制造

摘要： 我国是一个农业大国,每年秸秆产量约9.40亿t,其中稻、麦秸秆占有很大比重。随着人们对环境越来越重视,如何合理有效利用秸秆资源逐渐成为人们关注的焦点。对稻、麦秸秆在传统农畜业、能源转化（气态、液态、固态生物燃料）以及工业制造生产（造纸、人造板、建筑用材等）中的应用进行综述,分析了这些应用途径在处理秸秆过程中的优缺点,最后提出秸秆资源利用转化的发展方向,为解决秸秆资源浪费问题提供参考。

语种： 中文

作者： 孙振宇;张源;左迎峰;吴义强;王张恒;...

期刊： 材料导报,2021年35(5):5181-5187 ISSN：1005-023X

作者机构： [孙振宇; 张源; 左迎峰; 吴义强; 王张恒; 吕建雄] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;Research Institute of Wood Industry, Chinese Academy of Forest, Beijing;100091, China;[孙振宇; 张源; 左迎峰; 吴义强; 王张恒] 410004, China

关键词： 速生木材;有机-无机复合改性;改性机制

摘要： 木材作为一种天然可再生资源被广泛应用于各个领域。近年来,随着我国对木材需求的日益增长和天然林资源的匮乏,速生木材作为硬质木材的替代品越来越受到人们的关注。但速生木材存在密度低、材质疏松、力学性能欠佳等不足,难以用于制造高附加值产品,因此需要对其进行改性增强处理。速生木材具有大量的孔隙和活性官能团,通过浸渍改性不仅可提高其密度和力学强度,还能赋予速生木材新的功能,进而提升其使用价值。传统的浸渍改性按照浸渍液的不同主要分为有机和无机两种方式,但均存在一些不足。有机改性液浸渍中所使用的有机树脂虽能与木材的活性官能团发生交联而形成紧密的结构,但是大多有机树脂含有游离甲醛等易挥发的有毒物质,会对环境和人体健康造成危害。而无机改性剂虽无毒环保,但大多难以在木材中形成稳定的结构,易发生流失与吸湿等现象,影响使用功能。有机-无机复合改性是一种新型的材料复合技术,它能将有机材料与无机材料的优点结合起来,在减少有机树脂用量的同时充分利用其包覆作用（或键结合）来固定无机改性剂以减少流失,并且有机树脂能与木材形成稳定的键结合。因此,在有机-无机材料的协同作用下,改性木材的性能得以大幅度提升,实用价值和应用领域得到进一步扩展。本文以有机-无机复合改性速生木材的研究现状为主题,以硅系、硼系、铜、钙及蒙脱土等无机组分为主线,对其研究进展进行详细描述,并对改性机理进行归纳总结。同时,从基础理论、制备工艺、基本性能以及经济成本等方面提出了有机-无机复合改性木材的发展趋势,旨在推动有机-无机复合改性方法能在速生木材的改性中得到更广泛的应用。

语种： 中文

作者： Wan, Caichao*;Jiao, Yue;Li, Xianjun;Tian, Wenyan;Li, Jian;...

期刊： Nanoscale,2020年12(5):3308-3316 ISSN：2040-3364

通讯作者： Wan, Caichao;Wu, Yiqiang

作者机构： [Wu, Yiqiang; Wan, CC; Wan, Caichao; Tian, Wenyan; Li, Xianjun] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Jiao, Yue; Li, Jian] Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.

通讯机构： [Wan, CC; Wu, YQ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Dielectric losses;Electromagnetic pulse;Electromagnetic wave interference;Flexible electronics;Magnetic nanoparticles;Plasma CVD;Plasma enhanced chemical vapor deposition;Polarization;Pollution;Shielding;Signal interference;Structural design;Combination technology;Electro magnetic pollution;Electromagnetic interference shielding;EMI shielding effectiveness;Environmental friendliness;Heterogeneous interfaces;Magnetron sputtering plasma;Multiple polarizations;Electromagnetic shielding

摘要： To shield against massive electromagnetic pollution and meet increasing demand in portable electronics, the development of flexible, lightweight and high-performance electromagnetic interference (EMI) shielding materials with good environmental friendliness is an urgent but still challenging need. Herein, a creative multi-dimensional and level-by-level assembly strategy is proposed to construct free-standing and sandwich-type nanoheterostructures consisting of flexible cotton-derived carbon fibers (CFs), magnetic and conductive nickel nanoparticles (Ni NPs) and highly conductive and large-surface-area dandelion-like graphene (DLG), via a high-precision combination technology of magnetron sputtering-plasma enhanced chemical vapor deposition. The multiple spatial-scale DLG/Ni NPs/CF composites achieve a remarkable conductivity of 625 S m-1 and an outstanding EMI shielding effectiveness of ∼50.6 dB in the X-band (8.2-12.4 GHz) which can be classified as attenuation levels of ""AAAA"" for professional use. The dielectric loss from multiple polarizations is principally responsible for the electromagnetic loss of the composites. Besides, the large surface area of heterogeneous interfaces and defects in DLG contribute to enhancing the amount of polarization. In addition, the ultrathin and ultralight composites (d = 0.65 mm, ρ = 113 mg cm-3) can be bent, twisted and folded, revealing their excellent processability for commercial uses. More importanly, this novel structural design concept opens up an interesting promising research field of novel next-generation EMI shielding materials. © 2020 The Royal Society of Chemistry.

语种： 英文

作者： 高鑫;周凡;付宗营;江京辉;吴义强;...

期刊： 安徽农业大学学报,2020年47(5):730-737 ISSN：1672-352X

作者机构： 中国林业科学研究院木材工业研究所, 北京, 100091;中南林业科技大学材料科学与工程学院, 长沙, 410004;[周永东; 周凡; 付宗营; 江京辉; 高鑫] 中国林业科学研究院木材工业研究所;[吴义强] 中南林业科技大学

关键词： 木材干燥;吸湿性;尺寸稳定性;杉木;干燥方法

摘要： 为明确不同干燥方法对人工林杉木吸湿及尺寸稳定性的影响,以40 mm杉木锯材为研究对象,通过高温干燥、常规干燥和气干3种方法进行干燥处理,采用双室温、湿度控制法和GAB等温吸附模型拟合系统研究了干燥方法对平衡含水率、尺寸稳定性、等温吸附线型等的影响规律,并采用低温核磁共振分析测定不同干燥方法试样的细胞壁最大吸着水含量。结果表明:相较于气干及常规干燥,高温干燥可较为显著的降低试样吸湿平衡含水率及弦向线性湿胀率;不同干燥方法试样的等温吸附曲线均可由GAB模型拟合,拟合度均高于0.91,且呈现第二类等温吸附曲线特征;高温干燥试样细胞壁吸着水最大含量明显低于气干和常规干燥材,与高温干燥对平衡含水率影响规律相似。

语种： 中文

作者： Jiao, Yue*;Wan, Caichao*;Wu, Yiqiang;Han, Jingquan;Bao, Wenhui;...

期刊： Nanoscale,2020年12(45):23213-23224 ISSN：2040-3364

通讯作者： Jiao, Yue;Wan, Caichao;Li, Jian

作者机构： [Han, Jingquan; Jiao, Yue] Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China.;[Wu, Yiqiang; Wan, Caichao] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Chengyu; Gao, He; Bao, Wenhui; Li, Jian; Wang, Yaoxing] Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.;[Han, Jingquan; Jiao, Yue] Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China.

通讯机构： [Jiao, Yue; Li, Jian] N;[Wan, Caichao] C;Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China.;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China.

关键词： Brick;Carbon;Cathode materials;Cathodes;Current density;Supercapacitor;Vanadium pentoxide;Asymmetric supercapacitor;Capacitance retention;Diffusion-controlled process;Electrochemical features;Electrochemical reactions;External surfaces;Large surface area;Nanoporous carbons;Capacitance

摘要： A green biomass-derived nanoporous carbon network (NCN) has been prepared and integrated with V2O5 sub-micron bricks (SMBs). The large surface area and high pore volume of the NCN can not only provide abundant sites for electrochemical reactions but also stabilize the structure of the V2O5 SMBs. The NCN@V2O5 SMB composite, acting as a novel cathode material, delivers a high areal capacitance of 786 mF cm-2 at 0.2 mA cm-2 and superior cycling stability with 89.5% capacitance retention after 5000 cycles. Besides, the electrode achieves an ultra-high rate capability (82% capacitance retention as the current density increases from 0.2 to 5 mA cm-2) since the contribution from the non-diffusion-controlled process is estimated to be as high as 95.5%-98.5% according to the kinetic analysis. Furthermore, the micropores are more favorable than the mesopores at lower current densities (0.2-2 mA cm-2), while the contribution of the external surface area becomes more significant for current densities higher than 2 mA cm-2. Moreover, an asymmetric supercapacitor assembled using this cathode and the NCN anode shows superior electrochemical properties, such as wide operating voltage, long cycle life and large energy density (72.2 μW h cm-2). Their excellent electrochemical features and good eco-friendliness confirm the potential of the NCN@V2O5 SMBs for use as supercapacitors. © 2020 The Royal Society of Chemistry.

语种： 英文