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： 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： Tian, Cuihua;Yang, Tianyun;Liu, Zhichen;Qing, Yan*;Zhang, Bin;...

期刊： Applied Surface Science,2020年510:145484 ISSN：0169-4332

通讯作者： Qing, Yan;Zhou, Jianbo

作者机构： [Yang, Tianyun; Wu, Yiqiang; Tian, Cuihua; Qing, Yan; Liu, Zhichen] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhou, Jianbo; Zhang, Bin] Chinese Acad Forestry, Forestry New Technol Res Inst, Beijing 100091, Peoples R China.

通讯机构： [Qing, Yan; Zhou, Jianbo] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Chinese Acad Forestry, Forestry New Technol Res Inst, Beijing 100091, Peoples R China.

关键词： Cellulose nanofibrils;CoFe nanoparticles;Exposing active sites;High performance;Well-aligned arrangement

摘要： Searching for specific methods to make better use of the existing catalysts plays a significant role in achieving superior electrocatalytic performance. Herein, cellulose nanofibrils (CNF), featuring abundant carboxyls and hydroxyls, was employed to deposit cobalt (Co2+) and iron (Fe3+) ions. The Co2+ and Fe3+ ions were dispersed homogeneously and avoided idiopathic aggregation. The generated CoFe nanoparticles were in a well-aligned arrangement on the CNF nanocarbon. Benefiting from this unique structure, active sites were exposed and their catalytic ability was released fully. As a result, the overpotential of the as-synthesized CoFe nanoparticles catalyst (Fe-CoS/NC) was 257 mV to deliver a current density of 10 mA cm−2 with a Tafel slope of 46.7 mV dec−1 in 1.0 M KOH electrolyte, outperforming the commercial RuO2 remarkably. The Fe-CoS/NC catalyst exhibited excellent stability, which the overpotential to deliver a current density of 10 mA cm−2 was only increased by 2.82% after 50 h chronopotentiometry measurement. The nanocarbon framework derived from CNF can not only induce the CoFe nanoparticels into a well-aligned arrangement to fully expose active sites, but also promote the transfer of electrons remarkably, providing a versatile platform for the structural design and a novel strategy to boost OER activity. © 2020 Elsevier B.V.

语种： 英文

作者： 郭鑫;任婷婷;袁寒梦;罗秋艳;吴义强;...

期刊： 山东化工,2020年49(17):179-180 ISSN：1008-021X

作者机构： 中南林业科技大学理学院,湖南长沙 410004;中南林业科技大学材料科学与工程学院,湖南长沙 410004;[罗秋艳; 卿彦; 袁寒梦; 吴义强; 郭鑫; 任婷婷] 中南林业科技大学

关键词： 创新;研究生教育;教学改革

摘要： 针对我国地方农林院校研究生存在的实践操作能力弱、科研敏感性不强以及创新思维缺乏等问题,通过借鉴国内外顶尖高校研究生创新能力培养模式的成功改革经验,提出打破现有化学工程与技术专业研究生教育教学体系方案,研究地方农林院校研究生传统课程教学体系并对其进行改革与创新,建立以化工为主导并结合林业科学的交叉融合式创新教学新体系,力求突出地方农林院校鲜明的"林"字特色,为国家乃至世界培养具有创造性思维能力和工程化创新能力的高端专门人才.

语种： 中文

作者： Xia, Liaoyuan*;Li, Xiangling;Wu, Yiqiang*;Hu, Shaoheng;Liao, Yu;...

期刊： Chemical Engineering Journal,2020年379:122325 ISSN：1385-8947

通讯作者： Xia, Liaoyuan;Wu, Yiqiang;Lu, Xihong

作者机构： [Huang, Le; Wu, Yiqiang; Liao, Yu; Xia, Liaoyuan; Hu, Shaoheng; Li, Xiangling; Qing, Yan; Xia, LY] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.;[Lu, Xihong] Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China.

通讯机构： [Xia, LY; Wu, YQ] C;[Lu, Xihong] S;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.;Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.

关键词： Asymmetric supercapacitors;Carbon fiber-enhanced hybrid aerogels;Cellulose nanofibers;Flexible electrode;Wearable electronics

摘要： Developing electrodes with excellent electrochemical and mechanical properties is the key to achieve state-of-the-art flexible asymmetric supercapacitors (ASCs). This work proposes a facile and scalable strategy to prepare high-performance flexible electrodes based on carbon fiber-reinforced cellulose nanofiber/multiwalled carbon nanotube-hybrid aerogels (CF-CNF/MWCNT-HAs). The three-dimensional (3-D) porous structure, excellent conductivity, binder-free nature, and high strength of the CF-CNF/MWCNT-HAs enable it to serve as a powerful platform for constructing flexible electrodes with outstanding capacitive performance. The as-prepared CF-CNF/MWCNT/MnO2 positive electrode and CF-CNF/MWCNT/active carbon (AC) negative electrode display remarkably high areal-specific capacitances (1745 and 1273 mF/cm2 at a current density of 1 mA/cm2, respectively). In addition, the carbon fiber-reinforced electrode also presented an excellent mechanical property with a maximum stress up to 27.9 MPa. The as-fabricated CF-CNF/MWCNT/MnO2//CF-CNF/MWCNT/AC flexible ASC device exhibits significant capacitance and energy density of 19.4 F/cm3 and 8.93 mWh/cm3, respectively. Additionally, this flexible ASC device can retain more than 96.7% of its capacitance after 3000 charge-discharge cycles. These results will enable us to fabricate flexible solid-state ASC devices from CF-CNF/MWCNT-HAs, and to expand its applications in the fields of portable and wearable electronics. © 2019 Elsevier B.V.

语种： 英文

作者： Zhang, Xiaofeng;Huang, Hanxiao;Qing, Yan;Wang, Hankun*;Li, Xingong*

期刊： Materials,2020年13(1):237- ISSN：1996-1944

通讯作者： Li, Xingong;Wang, Hankun

作者机构： [Li, Xingong; Zhang, Xiaofeng; Huang, Hanxiao; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Hankun; Zhang, Xiaofeng; Huang, Hanxiao] Int Ctr Bamboo & Rattan, Inst New Bamboo & Rattan Based Biomat, Beijing 100102, Peoples R China.;[Wang, Hankun] SFA, Beijing 100102, Peoples R China.;[Wang, Hankun] Beijing Cobuilt Key Lab Bamboo & Rattan Sci & Tec, Beijing 100102, Peoples R China.

通讯机构： [Li, Xingong] C;[Wang, Hankun] I;[Wang, Hankun] S;[Wang, Hankun] B;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Bamboo;Biomechanics;Cells;Cellulose;Crystallinity;Cytology;Fibers;Film preparation;Lignin;Tensile strength;Tensile testing;X ray powder diffraction;Bamboo fibers;Bamboo products;Cellulose nanofibrils (CNFs);Comparison study;Nano-fibrils;Parenchyma cells;Water mediums;Nanofibers;Bamboo;Cells;Cellulose;Crystallinity;Cytology;Fibers

摘要： In this study, bamboo fibers and parenchyma cells were separated by a physical water-medium method. To compare the characteristics of nanofibrils from these two types of cells, lignocellulose nanofibrils (LCNFs) and cellulose nanofibrils (CNFs) were prepared by different processes. Atomic force microscopy analysis revealed that both fibers and parenchyma cells can be separated into individual fibrils after grinding three times. However, LCNFs had a diameter of 20-40 nm, which was larger than that of CNFs (10-20 nm). Additionally, the films prepared from LCNFs had lower tensile strength, but higher hydrophobicity compared with those from CNFs. X-ray diffraction analysis and tensile test of the films showed that the nanofibrils isolated from fibers and parenchyma cells had similar crystallinity and mechanical properties. This study shows a promising application of bamboo parenchyma cells, which are usually discarded as waste in the processing of bamboo products, in the preparation of nanofibers. © 2020 by the authors.

语种： 英文

作者： Tao, Xu;Luo, Sha;Tian, Cuihua;Qing, Yan*;Lu, Xihong;...

期刊： ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2020年8(4):1859-1867 ISSN：2168-0485

通讯作者： Qing, Yan;Wu, Yiqiang

作者机构： [Tao, Xu; Qing, Yan; Wu, Yiqiang; Tian, Cuihua; Yan, Ning; Luo, Sha] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, MOE Key Lab Bioinorgan & Synthet Chem, KLGHEI Environm & Energy Chem, Sch Chem, Guangzhou 510275, Peoples R China.;[Yan, Ning] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON MSS 3B3, Canada.

通讯机构： [Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Peoples R China.

关键词： Transition metal phosphides;Cellulose nanofibrils;Carbon nanotubes;Porous network structure;Efficient oxygen evolution reaction

摘要： Production of cost-efficient and robust electrocatalysts toward oxygen evaluation reaction (OER) is a challenging work. In this work, cellulose nanofibrils (CNF) obtained from natural plant fiber with distinctive three-dimensional networks are used as structural skeletons and conductive substrates for electrocatalytic materials. One-step pyrolysis of aerogel composed of CNF and nickel salt yields Ni@Ni2P nanoparticles encapsulated in nitrogen-doped interconnected carbonized CNF and carbon nanotubes (denoted as Ni@Ni2P/N-CNF-CN). Benefiting from the desirable characteristics conferred by the carbon substrates, such as large specific surface area, multitudinous mesopores, and favorable conductivity, the hybrid catalyst exhibits excellent catalytic performance toward OER with a low overpotential of 269 mV to reach a current density of 10 mA cm-2 and a low Tafel slope of 65.0 mV dec-1 in 1 M KOH solution. Furthermore, the as-prepared catalyst also reveals favorable stability with 1.7% decay after 20 h long-term chronopotentiometry testing. The approach to convert inexpensive and renewable biopolymers into high value-added carbon based electrocatalytic materials described in the present work provides novel, green, and broader opportunities for the utilization of biomass materials. Copyright © 2020 American Chemical Society.

语种： 英文

作者： Huang, Hanxiao;Yu, Yunshui;Qing, Yan;Zhang, Xiaofeng;Cui, Jia;...

期刊： Materials,2020年13(2):477- ISSN：1996-1944

通讯作者： Wang, Hankun

作者机构： [Zhang, Xiaofeng; Cui, Jia; Huang, Hanxiao; Yu, Yunshui; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Wang, Hankun; Zhang, Xiaofeng; Huang, Hanxiao] Int Ctr Bamboo & Rattan, Inst New Bamboo & Rattan Based Biomat, Beijing 100102, Peoples R China.;[Wang, Hankun; Zhang, Xiaofeng; Huang, Hanxiao] State Forestry & Grassland Adm, SFA, Beijing 100102, Peoples R China.;[Wang, Hankun; Zhang, Xiaofeng; Huang, Hanxiao] State Forestry & Grassland Adm, Beijing Cobuilt Key Lab Bamboo & Rattan Sci & Tec, Beijing 100102, Peoples R China.

通讯机构： [Wang, Hankun] I;[Wang, Hankun] S;Int Ctr Bamboo & Rattan, Inst New Bamboo & Rattan Based Biomat, Beijing 100102, Peoples R China.;State Forestry & Grassland Adm, SFA, Beijing 100102, Peoples R China.;State Forestry & Grassland Adm, Beijing Cobuilt Key Lab Bamboo & Rattan Sci & Tec, Beijing 100102, Peoples R China.

关键词： Bamboo;Contact angle;Fire resistance;Fourier transform infrared spectroscopy;Growth rate;Hydrophobicity;Scanning electron microscopy;Smoke;Thermal conductivity;Thermal insulation;Ammonium polyphosphates;Fire-resistant properties;Flame retardant properties;Heat Release Rate (HRR);Holocellulose;Industrial bamboo residue;Methyl trimethoxysilane;Thermal insulation materials;Aerogels

摘要： In this study, water-soluble ammonium polyphosphate- (APP) and methyl trimethoxysilane (MTMS)-modified industrial bamboo residue (IBR)-derived holocellulose nanofibrils (HCNF/APP/ MTMS) were used as the raw materials to prepare aerogels in a freeze-drying process. Synthetically modified aerogels were confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and thermal stability measurements. As-prepared HCNF/APP/MTMS aerogels showed themselves to be soft and flexible. The scanning electron microscopy (SEM) analysis showed that the foam-like structure translates into a 3D network structure from HCNF aerogels to HCNF/APP/MTMS aerogels. The compressive modules of the HCNF/APP/MTMS aerogels were decreased from 38 kPa to 8.9 kPa with a density in the range of 12.04-28.54 kg/m3, which was due to the structural change caused by the addition of APP and MTMS. Compared with HCNF aerogels, HCNF/APP/MTMS aerogels showed a high hydrophobicity, in which the water contact angle was 130°, and great flame retardant properties. The peak of heat release rate (pHRR) and total smoke production (TSP) decreased from 466.6 to 219.1 kW/m2 and 0.18 to 0.04 m2, respectively, meanwhile, the fire growth rate (FIGRA) decreased to 8.76 kW/s·m2. The thermal conductivity of the HCNF/APP/MTMS aerogels was 0.039 W/m·K. All results indicated the prepared aerogels should be expected to show great potential for thermally insulative materials. © 2020 by the authors.

语种： 英文

作者： Tian, Cuihua;Luo, Sha;She, Jiarong;Qing, Yan*;Yan, Ning;...

期刊： Applied Surface Science,2019年464:606-615 ISSN：0169-4332

通讯作者： Qing, Yan;Wu, Yiqiang

作者机构： [Qing, Yan; Wu, Yiqiang; Tian, Cuihua; Luo, Sha; She, Jiarong; Liu, Zhichen] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Yan, Ning] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 2E8, Canada.;[Yan, Ning] Univ Toronto, Fac Forestry, Toronto, ON M5S 2E8, Canada.

通讯机构： [Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Cellulose nanofibrils;Flower-like BiOCl;Hydrophilic surface;Photocatalytic activity;Photosensitization

摘要： Control the photocatalytic activity by texturing morphology and surface property is the fundamental and efficient process for the advanced applications of semiconductors. In this work, high-performance flower-like BiOCl (BOC) nanomaterials were fabricated employing sustainable cellulose nanofibrils (CNFs) as regulator through a facile one-pot hydrothermal method. The CNFs doped BiOCl (CBOC) formed flower-like morphology and the size was decreased. Ascribing to the enhanced photosensitization and photocatalysis, RhB could be totally degraded by CBOC-5 (5% of CNFs) within 16 min under visible light irradiation, exhibiting outstanding degradation efficiency. The roles of adsorption, photosensitization and photocatalysis of CBOC-5 to RhB and tetracycline (TC) were comprehensively studied. The [rad] O 2 − and holes were determined to be the active species during the RhB degradation in the presence of CBOC-5 under visible light irradiation and CBOC-5 showed excellent stability after 5 times repeated use. The crucial role of CNFs for the improved photocatalytic activity was mainly attributed to forming flower-like morphology, reducing the size of BOC and enhancing the hydrophilic surface, as a result, the absorption of visible light, migration of electron and the interaction of CBOC-5 with RhB were promoted remarkably, which enhanced both photosensitization and photocatalytic activity significantly. © 2018 Elsevier B.V.

语种： 英文

作者： Xia, Liaoyuan*;Hu, Shaoheng;Zhang, Xueqin;Huang, Le;Liao, Yu;...

期刊： RSC Advances,2019年9(23):12877-12885 ISSN：2046-2069

通讯作者： Xia, Liaoyuan;Wu, Yiqiang;Lu, Xihong

作者机构： [Huang, Le; Wu, Yiqiang; Liao, Yu; Xia, Liaoyuan; Hu, Shaoheng; Zhang, Xueqin; Qing, Yan; Jiang, Wenping; Xia, LY] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Huang, Le; Liao, Yu; Xia, Liaoyuan; Hu, Shaoheng; Zhang, Xueqin] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, MOE, Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.

通讯机构： [Xia, LY; Wu, YQ; Xia, Liaoyuan] C;[Lu, Xihong] S;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci &, Changsha 410004, Hunan, Peoples R China.;Sun Yat Sen Univ, Sch Chem, MOE, Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.

摘要： Three-dimensional (3D) electrode materials are ideal candidates for use in fabricating high-performance supercapacitors (SCs), owing to their unique network structure and excellent electrochemical properties. In this study, an aerogel film produced by the freeze-drying self-aggregation of multiwall carbon nanotubes (MWCNTs) and cellulose nanofibers (CNFs) served as the "skin", and an inter-connected 3D network of nickel foam (NF) as the "framework", for the fabrication of an MWCNT/CNF-NF (called MCN) hybrid material with a distinct "skin-framework" architecture. Considering the metrics of excellent conductivity, high wettability, binder-free and unique 3D "skin-framework" structure, the MCN hybrid material has great potential as an electroactive material platform in constructing state-of-the-art asymmetric supercapacitor (ASC) electrodes. By incorporating MCN with electroactive manganese dioxide (MnO2) and active carbon (AC), MnO2-MCN and AC-MCN composite electrodes with respective high areal capacitances of 1784.8 (equal to 469.7 F g-1) and 868.8 mF cm-2 (equal to 126.3 F g-1) at 5 mA cm-2 were successfully prepared. Further, both kinds of electrodes exhibited high charge/discharge ability rates and good cycle performance. Moreover, an optimally assembled MnO2-MCN//AC-MCN solid-state ASC was reversibly charged/discharged at voltages as high as 1.8 V and possessed a remarkable volumetric capacity of 9.83 F cm-3 and an energy density of 4.25 mW h cm-3, as well as good cycle stability. © 2019 The Royal Society of Chemistry.

语种： 英文

作者： Tian, Cuihua;Liu, Zhichen;Wu, Yiqiang*;Lu, Xihong;Yang, Tianyun;...

期刊： ChemElectroChem,2019年6(13):3303-3310 ISSN：2196-0216

通讯作者： Wu, Yiqiang;Qing, Yan

作者机构： [Tao, Xu; Yang, Tianyun; Wu, Yiqiang; Tian, Cuihua; Qing, Yan; Liu, Zhichen] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Qing, Yan] Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China.

通讯机构： [Wu, YQ; Qing, Y] C;[Wu, YQ; Qing, Y] H;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.

关键词： cellulose nanofibrils;NiFe electrocatalyst;tailoring performance;high efficiency;oxygen evolution reaction

摘要： <jats:title>Abstract</jats:title><jats:p>High performance, resource abundance, and environmental friendliness have been raising as major challenges for the next‐generation of affordable and sustainable electrocatalysts. Herein, natural cellulose nanofibrils (CNFs) with abundant carboxyls and hydroxyls were employed to tailor NiFe catalysts (NiFeNSC) for the efficient oxygen evolution reaction (OER). Benefiting from the introduction of CNF, the NiFe metal ions were homogeneously dispersed on the CNF surface and exhibited a smaller particle size. Additionally, the surface area was 3.17 times larger and the surface wettability was significantly improved. By integrating the active NiFe nanoparticles with doped CNF, the overpotential of synthesized NiFeNSC catalyst was decreased from 370 mV to 244 mV to deliver a current density of 10 mA cm<jats:sup>−2</jats:sup>, and exhibited a small Tafel slope of 43.3 mV dec<jats:sup>−1</jats:sup> in 1.0 M KOH electrolyte. Impressively, the NiFeNSC displayed excellent long‐term stability, which was only 38 mV increased over 24 h chronopotentiometry measurement, outperforming the catalyst without CNF (NiFeNS) and commercial RuO<jats:sub>2</jats:sub> catalyst remarkably. The present results demonstrate a new avenue for designing resource abundant and sustainable electrocatalysts, providing a novel strategy to replace the fossil‐involved nanocarbon.</jats:p>

语种： 英文

作者： 黄汉霄;喻云水;卿彦;张晓凤;王汉坤

作者机构： 中南林业科技大学材料科学与工程学院 长沙410000;国际竹藤中心竹藤生物质新材料研究所 北京100102

会议名称： 中国化学会第一届全国纤维素学术研讨会

会议时间： 2019-10-10

会议地点： 中国四川成都

会议论文集名称： 中国化学会第一届全国纤维素学术研讨会论文集

摘要： 竹材可以看做一种纤维增强薄壁细胞基体的复合材料,其中纤维与薄壁细胞两相结构的差异性及化学组成决定了木质纤维素在微纤化过程中的难易程[1,2]。基于此,本研究以竹材为原料,通过调控纤维和薄壁细胞的含量,采用冷冻干法制备了竹源自增强纤维素气凝胶,并探究了不同原料配比、化学组成对气凝胶力学性能的影响。竹源自增强纤维素气凝胶的形貌特征、化学组成及力学性能分别用环境扫描电镜（FE—SEM）、红外光谱（FTIR）和微力学试验机进行测试。扫描电镜的结果表明成功制备了以纤维为增强相的多尺度自增强纤维素气凝胶。力学测试结果分析得到纤维素气凝胶的力学性能随着纤维含量的变化而变化,这种对力学性能的改善是基于气凝胶中纤维与微纤化纤维素的协同作用,从而提高其力学强度和机械稳定性[3]。此外,半纤维素的存在使气凝胶的力学性能提高了209%,说明其对提高纤维与MFC间的结合力起着重要作用[4]。气凝胶的力学性能与原料配比、化学成分和结构密切相关,有效调控气凝胶的机械性能可实现其在不同领域中的应用。

语种： 中文

作者： Liu, Liu;Wang, Lijun;Luo, Sha;Qing, Yan*;Yan, Ning;...

期刊： Journal of Materials Science,2019年54(8):6699-6708 ISSN：0022-2461

通讯作者： Qing, Yan;Wu, Yiqiang

作者机构： [Qing, Yan; Wu, Yiqiang; Wang, Lijun; Liu, Liu; Yan, Ning; Luo, Sha] Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Shaoshan South Rd 498, Changsha 410004, Hunan, Peoples R China.;[Qing, Yan; Wu, Yiqiang] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Shaoshan South Rd 498, Changsha 410004, Hunan, Peoples R China.;[Yan, Ning] Univ Toronto, Fac Forestry, 27 Kings Coll Cir, Toronto, ON M5S 1A1, Canada.

通讯机构： [Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Technol, Shaoshan South Rd 498, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Shaoshan South Rd 498, Changsha 410004, Hunan, Peoples R China.

关键词： Cellulose;Cellulose derivatives;Composite membranes;Functional materials;Liquid crystals;Nanocrystals;Silver compounds;Silver nanoparticles;Anti-counterfeit;Cellulose nano-crystals;Cellulose nanocrystal (CNCs);Chiral structures;Iridescent colors;Liquid crystal template;Structural and optical properties;Tunable optical properties;Optical properties;Cellulose Derivatives;Labels;Liquid Crystals;Optical Materials;Optical Properties;Patterns;Silver Compounds

摘要： Cellulose nanocrystals (CNCs) possessing chiral nematic structures have been developed as liquid crystal templates for optical materials and devices. These templates provide materials with advanced structural and optical properties, leading to numerous promising discoveries of new functional materials. In this work, the chiral nematic CNC/silver nanoparticles (CNC/AgNPs) composite membranes were prepared and displayed striking iridescent colors. The addition of AgNPs strengthened the chiral structure of CNC-based composites by adjusting the pitch of the chiral nematic structure. As the AgNPs content decreased from 8 to 2wt%, a redshift of the reflection wavelength was observed from 475 to 773nm, and the distance between the two adjacent layers of the membrane increased from 155 to 254nm, according to a fitted linear function. Therefore, this composite membrane exhibited excellent chiral optical properties, and the chiral reflectance could be tuned accurately by regulating the content ratio of CNCs to AgNPs. New insights into designing advanced functional optics were provided, herein to show their potential applications, such as in smart windows and anti-counterfeit labels. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

语种： 英文

作者： 卿彦;关鹏飞;詹满军;陈秀兰;刘文杰;...

期刊： 中南林业科技大学学报,2019年39(7):108-113,142 ISSN：1673-923X

作者机构： 中南林业科技大学材料科学与工程学院;[詹满军] 广西丰林木业集团股份有限公司;[陈秀兰] 大亚人造板集团有限公司;[卿彦; 刘文杰; 吴义强; 李新功; 罗莎; 刘明; 关鹏飞] 中南林业科技大学

关键词： 游离甲醛;锐钛矿型二氧化钛;紫外光;光催化;降解

摘要： 如何降低游离甲醛含量一直是脲醛树脂研究的热点之一。采用锐钛矿型纳米二氧化钛(TiO_2)改性脲醛树脂,探索在紫外光(波长λ=365 nm)照射下,纳米TiO_2对脲醛树脂中游离甲醛的催化降解效果。通过分析脲醛树脂中游离甲醛的含量,研究了光照类型、时间以及纳米TiO_2的含量对光降解甲醛的影响。使用傅里叶变换红外光谱(FTIR)、同步热分析(TG)表征了光催化降解游离甲醛对脲醛树脂化学结构及热性能的影响。结果表明:在脲醛树脂的降醛处理中,加入尿素质量1 %的锐钛矿型纳米TiO_2,室温下紫外光照时长48 h,可以获得36.7 %的游离甲醛降解率。紫外光照可以促进脲醛树脂的固化,使其固含量和粘度上升,固化时间缩短,但对脲醛树脂的化学结构和热性能没有明显影响。

语种： 中文

作者： 张晓凤;李新功;卿彦;黄汉霄;王汉坤

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;国际竹藤中心竹藤生物质新材料研究所 北京100102

会议名称： 中国化学会第一届全国纤维素学术研讨会

会议时间： 2019-10-10

会议地点： 中国四川成都

会议论文集名称： 中国化学会第一届全国纤维素学术研讨会论文集

摘要： <正>本研究利用竹材纤维与薄壁细胞的密度差异,以水为介质,实现了两者的物理分离。为了比较这两种细胞的纳米纤丝的特征,采用不同的化学预处理结合机械研磨方法制备了含木质素纤维素纳米纤丝（LCNF）和纤维素纳米纤丝（CNF）。原子力显微镜图像显示,研磨三次后,

语种： 中文

作者： Jia, Shanshan;Lu, Yao;Luo, Sha;Qing, Yan*;Wu, Yiqiang*;...

期刊： Chemical Engineering Journal,2019年366:439-448 ISSN：1385-8947

通讯作者： Qing, Yan;Wu, Yiqiang

作者机构： [Qing, Yan; Wu, Yiqiang; Luo, Sha; Jia, Shanshan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Lu, Yao] UCL, Dept Mech Engn, London WC1E 7JE, England.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Parkin, Ivan P.] UCL, Dept Chem, 20 Gordon St, London WC1H 0AJ, England.

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

关键词： All-damage-healable;Biomimetic;Controllable photocatalytic property;Lignocellulose;Superhydrophobic surface

摘要： Preparation of superhydrophobic surfaces capable of recovering both the surface chemistry and hierarchical structure is still a challenge. In this work, all-damage-healable superhydrophobic surface was fabricated by assembly of superhydrophobic and hierarchical BiOCl on lignocellulosic substrates. Fibers having thermally responsive behavior, the main component of lignocellulosic materials, act as the underlying movable substrates. By a simple heating treatment, fibers can convey the undamaged neighbored superhydrophobic coating to the damaged area. In this way, the loss of superhydrophobicity caused by rigorous mechanical destructions, even deep cuts of one hundred of micrometers wide, can be restored, mimicking the self-healing mechanism of human skin. Superior self-healing ability in surface chemistry was also confirmed. Meanwhile, the as-prepared superhydrophobic surfaces demonstrated reliable photocatalytic ability, a useful property for resisting organic contaminations. Interestingly, it was found that the photocatalytic activity can be enhanced by tuning the surface wettability. This work reported the first use of substrate material's inherently thermally responsive property to demonstrate self-healing superhydrophobic surface with photocatalyticity, which not only promotes the application of superhydrophobic materials in complex environment, but also opens up a new perspective in designing durable superhydrophobic materials. © 2019 Elsevier B.V.

语种： 英文

作者： 刘明;陈秀兰;詹满军;吴义强;刘元;...

期刊： 中国胶粘剂,2019年28(05):25-30 ISSN：1004-2849

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;大亚人造板集团有限公司,江苏镇江,212300;广西丰林木业集团股份有限公司,广西南宁,530031;[李贤军; 卿彦; 吴义强; 李新功; 刘元; 刘明] 中南林业科技大学;[詹满军] 广西丰林木业集团股份有限公司

关键词： 胶粘剂;棉籽粉;人造板;黏度

摘要： 研究了碱处理、尿素改性、碱和尿素联合改性以及淀粉基胶粘剂共混对棉籽粉基胶粘剂理化性质及物理力学性能的影响。研究结果表明:改性方法对棉籽粉基胶粘剂干状胶合强度（≥4.0 MPa）无明显影响,并且碱和尿素联合改性可以将棉籽粉基胶粘剂的黏度从51.0 mPa·s提高至128.5 mPa·s。而使用高黏度淀粉基胶粘剂与棉籽粉基胶粘剂共混制得的复合胶粘剂的黏度高于530 mPa·s;尿素对棉籽粉中的棉蛋白具有一定的活化作用,淀粉基胶粘剂并未对棉籽粉化学官能团产生影响;获得的棉籽粉基胶粘剂符合人造板生产工艺要求,为其工业化利用提供支持。

语种： 中文

作者： Zhang, Zhen;Li, Lei;Qing, Yan*;Lu, Xihong;Wu, Yiqiang*;...

期刊： Journal of Physical Chemistry C,2019年123(38):23374-23381 ISSN：1932-7447

通讯作者： Qing, Yan;Wu, Yiqiang

作者机构： [Yang, Wen; Qing, Yan; Wu, Yiqiang; Zhang, Zhen; Li, Lei] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, KLGHEI Environm & Energy Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.;[Yan, Ning] Univ Toronto, Fac Forestry, Toronto, ON M5S 3E8, Canada.

通讯机构： [Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.

关键词： Capacitance;Carbonization;Cellulose;Cyclic voltammetry;Molecular biology;Morphology;Nanofibers;Nanostructures;Shrinkage;Supercapacitor;Wood;Carbonization temperatures;Electrochemical performance;Electrochemical stabilities;Internal structure;Nano-fiber structure;Specific capacitance;Specific surface area (SSA);Total pore volume;Aerogels;Anatomy;Capacitance;Carbonization;Cellulose;Shrinkage;Wood

摘要： The internal structure of carbon aerogels (CAs) is a key factor affecting their electrochemical performance and applications. In this study, the morphology of CAs and their effects on electrochemical properties were investigated via the control of the carbonization temperature. CAs were prepared by freeze-drying combined with high-temperature carbonization using wood cellulose as the raw material. The nanoplate and nanofiber structures of CAs were manipulated via the control of the carbonization temperature. Results revealed that the volume shrinkage as well as independent nanofibers of CAs increase with temperature, but the nanoplate structure decreases. The nanofiber and nanoplate structures affect the specific surface area (SSA) and electrochemical performance of carbon materials. At a temperature of 800 °C, the highest SSA and total pore volume of CAs were observed, with excellent electrochemical stability (after 5000 cycles of cyclic voltammetry testing, it can still keep 89.43% of the original specific capacitance), and a specific capacitance up to 172.7 F g-1. Finally, a symmetrical supercapacitor device was assembled using the CAs, which exhibited a desirable energy density of 4.5 Wh kg-1. And the results obtained from this study can be conducive to the applications of nanoscale CAs in energy storage. © 2019 American Chemical Society.

语种： 英文

作者： Wu, Yiqiang;Tao, Xu;Qing, Yan*;Xu, Han;Yang, Fan;...

期刊： Advanced Materials,2019年31(15):e1900178 ISSN：0935-9648

通讯作者： Qing, Yan;Lu, Xihong

作者机构： [Tao, Xu; Wu, Yiqiang; Xu, Han; Liu, Ming; Tian, Cuihua; Luo, Sha; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Yang, Fan; Lu, Xihong] Sun Yat Sen Univ, Sch Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.

通讯机构： [Qing, Yan] C;[Lu, Xihong] S;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;Sun Yat Sen Univ, Sch Chem, Key Lab Low Carbon Chem & Energy Conservat Guangd, MOE,Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.

关键词： Cr doping;bifunctional catalyst;structural manipulation;transition metals phosphide;water splitting

摘要： Exploring high-efficiency, stable, and cost-effective bifunctional electrocatalysts for overall water splitting is greatly desirable and challenging. Herein, a newly designed hybrid catalyst with Cr-doped FeNi-P nanoparticles encapsulated into N-doped carbon nanotubes (Cr-doped FeNi-P/NCN) with unprecedented electrocatalytic activity is developed by a simple one-step heating treatment. The as-synthesized Cr-doped FeNi-P/NCN with moderate Cr doping exhibits admirable oxygen evolution reaction and hydrogen evolution reaction activities with overpotentials of 240 and 190 mV to reach a current density of 10 mA cm(-2) in 1 m KOH solution. When used in overall water splitting as a bifunctional catalyst, it needs only 1.50 V to give a current density of 10 mA cm(-2) , which is superior to its typically integrated Pt/C and RuO2 counterparts (1.54 V @ 10 mA cm(-2) ). Density functional theory calculation confirms that Cr doping into a FeNi-host can effectively alter the relative Gibbs adsorption energy and reduces the theoretical overpotential. Additionally, the synergetic effects between Cr-doped FeNi-P nanoparticles and NCNs are regarded as significant contributors to accelerate charge transfer and promote electrocatalytic activity in hybrid catalysts.

语种： 英文