检索结果-南通市图书馆

Hierarchically wood-derived integrated electrode with tunable superhydrophilic/superaerophobic surface for efficient urea electrolysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 566-575,I0014页

作者： Yu Liao Songlin Deng Yan Qing Han Xu Cuihua Tian yiqiang wu College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha 410004HunanChina

Conferring surfaces with superhydrophilic/superaerophobic characteristics is desirable for synthesizing efficient gas reaction ***,complicated procedures,high costs,and poor interfaces hinder ***,an integrated electrode with tunable wettability derived from a hierarchically porous wood scaffold was well designed for urea oxidation reaction(UOR).Interestingly,the outer surface of the wood lumen was optimized to the preferred wettability via stoichiometry to promote electrolyte permeation and gas *** catalyst exhibits outstanding activity and durability for UOR in alkaline media,requiring only a potential of 1.36 V(***)to deliver 10 m A cm^(-2)and maintain its activity without significant decay for 60 *** experiments and theoretical calculations demonstrate that the nickel(oxy)hydroxide layer formed through surface reconstruction of nickel nanoparticles improves the active sites and intrinsic ***,the superwetting properties of the electrode promote mass transfer by guaranteeing substantial contact with the electrolyte and accelerating the separation of gaseous products during *** findings provide the understanding needed to manipulate the surface wettability through rational design and fabrication of efficient electrocatalysts for gas-evolving processes.

关键词： Integrated electrode Wood scaffold Superhydrophilic/Superaerophobic surface Urea oxidation reaction

Elevated Temperature Properties of Bamboo Shaving Reinforced Geopolymer Composites

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第1期11卷 27-40页

作者： Xinli Zhang Jiayu Zhang Zuhua Zhang yiqiang wu Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China College of Civil Engineering Hunan UniversityChangsha410082China

Geopolymer is a new alternative cement binder to produce *** the present study,a novel geopolymer composites containing bamboo shaving(0–2 wt.%)were fabricated and exposed to the temperatures of 200℃,400℃,600℃and 800℃.Physical properties,micro-structure,and mechanical strengths of the geopolymer composites were evaluated before and after heating in order to understand their thermal properties,which are essential for the use as building *** the temperature rises,the drying shrinkage and apparent porosity of the composites increase,while the compressive and bending strengths *** the temperature range of 200℃–800℃,the residual compressive strength rates of the geopolymer composite containning 2 wt.%bamboo shaving were respective 73.8%,61.47%,56.16%,and 29.56%,meanwhile,the residual flexural strength rates were respective 46.69%,8.68%,2.52%,and 2.33%.Correspondingly,the residual compressive strength rates of pure geopolymer were respective 72.81%,61.99%,54.55%,and 14.64%;the residual flexural strength rates were 48.87%,5.69%,3.22%,and 2.47%,*** electron microscope(SEM),optical microscope,and X-ray diffractometry(XRD)were applied to find the microscopic *** strength loss in the geopolymer composites was mainly because of the thermal degradation of bamboo shaving and shrinkage of geopolymer *** shaving has great potential as reinforcer in developing low-cost geopolymer composites and may be used for applications up to 400℃.

关键词： Geopolymer composites bamboo shaving mechanical properties high temperature microstructure

Configuring single-layer MXene nanosheet onto natural wood fiber via C-Ti-C covalent bonds for high-stability Li-S batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第8期95卷 701-711,I0016页

作者： Yangyang Chen Yu Liao Ying wu Lei Li Zhen Zhang Sha Luo yiqiang wu Yan Qing College of Materials Science and Technology Central South University of Forestry and TechnologyChangsha 410004HunanChina

Lithium-sulfur batteries(LSBs)are considered promising candidates for next-generation battery technologies owing to their outstanding theoretical energy density and ***,the low conductivity and polysulfide shuttling effect of S cathodes severely hamper the practical performance of ***,in situ-generated single layer MXene nanosheet/hierarchical porous carbonized wood fiber(MX/PCWF)composites are prepared via a nonhazardous eutectic activation strategy coupled with pyrolysis-induced gas *** unique architecture,wherein single layer MXene nanosheets are constructed on carbonized wood fiber walls,ensures rapid polysulfide conversion and continuous electron transfer for redox *** C-Ti-C bonds formed between MXene and PCWF can considerably expedite the conversion of polysulfides,effectively suppressing the shuttle *** impressive capacity of 1301.1 m A h g^(-1)at 0.5 C accompanied by remarkable stability is attained with the MX/PCWF host,as evidenced by the capacity maintenance of 722.6 m A h g^(-1)after 500 ***,the MX/PCWF/S cathode can still deliver a high capacity of 886.8 m A h g^(-1)at a high S loading of 5.6 mg cm^(-2).The construction of two-dimensional MXenes on natural wood fiber walls offers a competitive edge over S-based cathode materials and demonstrates a novel strategy for developing high-performance batteries.

关键词： Lithium-sulfur batteries S cathodes MXene nanosheets Wood fiber C-Ti-C bonds

Effect of the Proportion of Bamboo Scraps on the Properties of Bamboo Scraps/Magnesium Oxychloride Composites

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2021年第10期9卷 1729-1739页

作者： Long Zheng yiqiang wu Shu Wang Guoan Sheng Baorong Sun Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China

This study was designed to solve the problem of large waste volume from bamboo processing residues in recent *** magnesium oxychloride(MO)cementitious material as the main material and bamboo residue(BR)as the reinforcing material,a BR/MO composite material was *** effects of BR amount on the molding properties,mechanical strength,and water resistance of BR/MO composites were examined and *** electron microscopy(SEM),X-ray diffractometry(XRD),and thermogravimetric analysis were used to characterize composite microscopic morphology,crystalline structure,and heat *** results showed that,when the BR content was 1.00%(by wt),the flowability of MO paste was beneficial to composite *** mechanical properties and water resistance were greatly affected by BR *** the BR content was 1.00%,composite compressive and bending strengths and softening coefficient all reached maximum ***,increases in water absorption by 24 h and decreases of contact angle were *** results suggested that,when the BR content was 1.00%,composite mechanical properties and water resistance were the best and the mechanical strength also improved with extended composite storage *** analysis indicated that BR played the role of a reinforcing phase in MO ***,when the BR content exceeded 1.00%,interfacial bonding between BR and MO became *** analysis showed that,with 1.00%BR content,composites showed more 5-phase crystals with high *** further explained the reason why this composite’s mechanical properties were the best and the heat resistance not deteriorated due to BR,which was easily decomposed.

关键词： Bamboo scraps magnesium oxychloride cementation mechanical properties water resistance interface bonding crystal structure

Preparation and Characterization of Phenolic Prepolymer Impregnated Chinese Fir by Cyclic Increasing-Pressure Method with Green and Efficient

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2020年第11期8卷 1473-1488页

作者： Yuan Zhang Ping Li yiqiang wu Guangming Yuan Xianjun Li Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China National Joint Engineering Research Center for Green Processing Technology of Agricultural and Forestry Biomass Changsha410004China

The Chinese fir wood was impregnated using a cyclic increasingpressure method(CIPM)with phenolic prepolymers as the impregnating *** Chinese fir and progressive increasing-pressure method(PIPM)impregnated Chinese fir were used as reference samples and were compared and *** product’s chemical structure,internal morphology,crystal structure,and heat resistance were *** transversal and longitudinal sections showed better filling effects,so that it bore greater external loading and reduced the water storage *** infused more phenolic prepolymer into the Chinese *** only producing more physical filling but also forming more hydrogen bond associations and chemical bond *** with PIPM and unmodi-fied Chinese fir,the CIPM impregnated Chinese fir had better mechanical strength and water *** cellulose chains in CIPM impregnated Chinese fir were more closely linked and their crystallinity were clearly *** in internal morphology and crystal structure explained the reason why the mechanical properties and water resistance of CIPM impregnated Chinese fir were improved *** Chinese fir had lower thermal decomposition rates,higher decomposition residual rates,and smaller combustion flames,which confirmed that it possessed improved heat and fire resistance.

关键词： Chinese fir phenolic prepolymer cyclic increasing pressure method chemical structure crystalline structure heat resistance

Comparative Study on the Properties of Inorganic Silicate and Organic Phenolic Prepolymer Modified Poplar Wood by Vacuum Cycle Pressurization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第9期10卷 2451-2463页

作者： Pengfei Guan Ping Li yiqiang wu Xingong Li Guangming Yuan Yingfeng Zuo College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China College of Furniture and Art Design Central South University of Forestry and TechnologyChangsha410004China

To enhance mechanical properties and improve flame retardancy and smoke suppression of fast-growing poplar wood in wood applications,the wood was impregnated and *** organic phenolic prepolymer and inorganic sodium silicate was used as contrasting impregnation modifiers and wood samples were impregnated by a bionic“respiration”method with alternating positive and negative *** weight percentage gain,density increase ratio,mechanical properties(bending and compressive strength and hardness),and water absorption rate of inorganic and organic-impregnated modified poplar wood(IIMPW and OIMPW,respectively)were compared and these properties in IIMPW were found to be higher than those of OIMPW with the exception of the water absorption rate which was lower than the *** was attributed to the superior absorption of sodium silicate that also improved the impregnation,reinforcement,and dimensional stability in the *** chemical structure,crystalline structure,internal morphology,flame retardancy,smoke suppression,and thermal stability of IIMPW and OIMPW were characterized by FT-IR,XRD,SEM,CONE,and ***-IR and XRD results showed that,although IIMPW cellulose crystallinity reduced the most,more chemical bonds were come into being in IIMPW,which explained the better physical and mechanical properties of *** with OIMPW,IIMPW had better flame retardant and smoke suppression performance.

关键词： Poplar wood sodium silicate impregnation modification mechanical properties dimensional stability flame retardancy and smoke suppression

Hierarchically porous cellulose nanofibril aerogel decorated with polypyrrole and nickel-cobalt layered double hydroxide for high-performance nonenzymatic glucose sensors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第10期17卷 1593-1607页

作者： Xuanze Li Wenyan Tian Caichao Wan Sulai Liu Xinyi Liu Jiahui Su Huayun Chai yiqiang wu College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha 410004China Department of Hepatobiliary Surgery Hunan Provincial People’s HospitalChangsha 410000China

With increasing emphasis on green chemistry,biomass-based materials have attracted increased attention regarding the development of highly efficient functional ***,a new pore-rich cellulose nanofibril aerogel is utilized as a substrate to integrate highly conductive polypyrrole and active nanoflower-like nickel-cobalt layered double hydroxide through in situ chemical polymerization and *** ternary composite can act as an effective self-supported electrode for the electrocatalytic oxidation of *** the synergistic effect of three heterogeneous components,the electrode achieves outstanding glucose sensing performance,including a high sensitivity(851.4μA·mmol^(−1)·L·cm^(−2)),a short response time(2.2 s),a wide linear range(two stages:0.001−8.145 and 8.145−35.500 mmol·L^(−1)),strong immunity to interference,outstanding intraelectrode and interelectrode reproducibility,a favorable toxicity resistance(Cl^(‒)),and a good long-term stability(maintaining 86.0%of the original value after 30 d).These data are superior to those of some traditional glucose sensors using nonbiomass *** determining the blood glucose level of a human serum,this electrode realizes a high recovery rate of 97.07%–98.89%,validating the potential for highperformance blood glucose sensing.

关键词： cellulose nanofibril aerogel nickel-cobalt layered double hydroxide polypyrrole nonenzymatic glucose sensor

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic environment

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2021年第4期15卷 19-40页

作者： Xinyi Liu Caichao Wan Xianjun Li Song Wei Luyu Zhang Wenyan Tian Ken-Tye Yong yiqiang wu Jian Li College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China Material Science and Engineering College Northeast Forestry UniversityHarbin150040China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore Yihua Lifestyle Technology Co. LtdHuaidong Industrial ZoneLianxia TownChenghai DistrictShantou515834China Caichao Wan

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 ***,we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic *** review begins with a brief introduction of the development of photocatalysts and hierarchical structure of *** 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 ***,we highlight typical approaches that improve the photocatalytic property,including metal element doping,morphology control and semiconductor ***,the structure-activity relationship of photocatalysts is ***,a brief summary and prospect of wood-derived photocatalysts is provided.

关键词： Wood Nanocatalysts Photodegradation Organic contaminants Composites

Waste to wealth: Oxygen-nitrogen-sulfur codoped lignin-derived carbon microspheres from hazardous black liquors for high-performance DSSCs

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第8期83卷 549-563,I0013页

作者： Wenjie Cheng Caichao Wan Xingong Li Huayun Chai Zhenxu Yang Song Wei Jiahui Su Xueer Tang yiqiang wu College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha 410004HunanChina School of Biomedical Engineering The University of SydneySydneyNew South Wales 2006Australia The University of Sydney Nano Institute The University of SydneySydneyNew South Wales 2006Australia

Carbon materials are effective substitutes for Pt counter electrodes(CEs) in dye-sensitized solar cells(DSSCs). However, many of these materials, such as carbon nanotubes and graphene, are expensive and require complex preparation process. Herein, waste lignin, recycled from hazardous black liquors,is used to create oxygen-nitrogen-sulfur codoped carbon microspheres for use in DSSC CEs through the facile process of low-temperature preoxidation and high-temperature self-activation. The large number of ester bonds formed by preoxidation increase the degree of cross-linking of the lignin chains, leading to the formation of highly disordered carbon with ample defect sites during pyrolysis. The presence of organic O/N/S components in the waste lignin results in high O/N/S doping of the pyrolysed carbon,which increases the electrolyte ion adsorption and accelerates the electron transfer at the CE/electrolyte interface, as confirmed by density functional theory(DFT) calculations. The presence of inorganic impurities enables the construction of a hierarchical micropore-rich carbon structure through the etching effect during self-activation, which can provide abundant catalytically active sites for the reversible adsorption/desorption of electrolyte ions. Under these synergistic effects, the DSSCs that use this novel carbon CE achieve a quite high power-conversion efficiency of 9.22%. To the best of our knowledge, the value is a new record reported so far for biomass-carbon-based DSSCs.

关键词： Lignin Carbon microspheres Codoping Hierarchical pores DSSCs