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Ammonium [email protected] @manganese dioxide nanowire arrays with enhanced reversible lithium storage

Applied Surface Science 2017年 416卷 402-410页

作者： Chang Wang Hui Liu Ming Jiang Yingde Wang Ruina Liu Zhiping Luo Xiaoqing Liu Weilin Xu Chuanxi Xiong Dong Fang College of Material Science and Engineering State Key Lab for New Textile Materials & Advanced Processing Technology Key Laboratory for New Textile Materials and Applications of Hubei Province Wuhan Textile University Wuhan 430070 PR China School of Metallurgy and Environment Central South University Changsha 410083 PR China Science and Technology on Advanced Ceramic Fiber and Composites Laboratory National University of Defense Technology Changsha 410073 PR China Department of Chemistry and Physics Fayetteville State University Fayetteville NC 28301 USA School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 PR China

Design and fabrication of novel optimized electrode materials are important for the development of new batteries for energy storage applications. Herein, we report on a hierarchical bulk electrode material with a tailored nanostructure that which consists of three components: a NH 4 V 4 O 10 nanowire as an active skeleton, an intermediate polymer layer (polypyrrole, PPy), and a metal oxide layer (MnO 2 ) as the outside shell. The NH 4 V 4 O 10 -PPy-MnO 2 nanowires exhibit present higher capacitance than that of the simple NH 4 V 4 O 10 -PPy [email protected] or NH 4 V 4 O 10 nanowires. The structure of double shells of combined PPy and MnO 2 is a key factor in enhancing their electrochemical performance including high specific capacitance and excellent cycling stability. Our V-based [email protected] @shell structure can serve as freestanding, compressible electrodes for various energy devices.

关键词： Ammonium vanadate Nanowire array [email protected] @shell structure Lithium ion battery

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Mechanical Properties and Fracture Behaviour of Multilayer Alumina Composites

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Journal of Wuhan University of technology(materials Science) 2015年第5期30卷 965-967页

作者：郑新国 ZHAO Fei 张金咏 Railway Engineering Research Institute of China Academy of Railway Science State Key Lab of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

Adopting a ceramic/polymer multilayer structure design to simulate the structure of nacre is usually believed to be an effective way to increase the toughness of ceramic composites at the expense of the material’s bending strength. However, in this study, we found that both the bending strength and the toughness could be improved simultaneously when using a certain Al2O3/Kevlar multilayer composite design compared to pure alumina samples with the same dimensions. The fracture behaviour of the Al2O3/Kevlar multilayer composite was studied to find a reason for this improvement. The results showed that the complex and asymmetrical stresses occurring in the Kevlar-reinforced layers were the main reason for the differences in fracture behaviour. We expect our results to open up new ways for the design of future high performance ceramic composites.

关键词： biomaterials alumina multilayer composite toughening

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Preparation of Nano-sized Zirconium Carbide Powders through a Novel Active Dilution Self-propagating High Temperature synthesis Method

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Journal of Wuhan University of technology(materials Science) 2015年第4期30卷 729-734页

作者：达奥运龙飞 WANG Jilin XING Weihong WANG Yang ZHANG Fan 王为民 FU Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Key Lab of New Processing Technology for Nonferrous Metals & Materials Ministry of Education China Guilin University of Technology

High quality nano-sized zirconium carbide （ZrC） powders were successfully fabricated via a developed chemical active dilution self-propagating high-temperature synthesis （SHS） method assisted by ball milling pretreatment process using traditional cheap zirconium dioxide powder （ZrO2）, magnesium powder （Mg） and sucrose （C12H22Oll） as raw materials. FSEM, TEM, HRTEM, SAED, XRD, FTIR and Raman, ICP- AES, laser particle size analyzer, oxygen and nitrogen analyzer, carbon/sulfur determinator and TG-DSC were employed for the characterization of the morphology, structure, chemical composition and thermal stability of the as-synthesized ZrC samples. The as-synthesized samples demonstrated high purity, low oxygen content and evenly distributed ZrC nano-powders with an average particle size of 50nm. In addition, the effects of endothermic rate and the possible chemical reaction mechanism were also discussed.

关键词： zirconium carbide ZrC self-propagating high-temperature synthesis active dilution nano-powders ball milling

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In-situ Preparation of TiB_2-TiB-Ti Functionally Graded materials by Improved Sintering Process

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Journal of Wuhan University of technology(materials Science) 2015年第4期30卷 710-714页

作者：刘国玺 LI Kezhi ZHANG Jinyong 张帆 School of Materials Science Northwestern Polytechinical University Ningbo Branch of Ordnance Science Institute of China State Key Lab of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

An improved multi-step sintering process was used to in-situ prepare TiB2-TiB-Ti FGMs. According to the sintering temperatures, the functionally graded materials （FGMs） were divided into three sections. After sintering at a proper temperature, the three sections were sintered together in turn. The experimental results showed that there were no obvious pores and cracks in the whole TiB2-TiB-Ti FGMs, and no delamination was found in the impacting test with good performance features, which indicated that there were no interface effects in FGMs during penetration, so that the TiB2-TiB-Ti FGMs were an ideal FGM.

关键词： FGMs TiB2 Ti Fabrication

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Room temperature growing the Kagomé net Pillared crystal structure of metal-organic frameworks

Room temperature growing the Kagomé net Pillared crystal st...

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The 3rd International Congress on advanced materials（AM2016）

作者： Kui Zhou Somboon Chaemchuen Zhaoxuan Wu Francis Verpoort School of Materials Science and Engineering Wuhan University of Technology State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

The rapid synthesis of Kagomé net layer pillared metal organic frameworks(MOFs) structure at room temperature was developed. Although this MOF series [M(bdc)(dabco)] varies in metal center(M= Co, Ni, Zn), the structure remains [the MOF is denoted as MBD;M = metal(Co, Ni, Zn);B = bdc(1,4-bicarboxylic acid);D = dabco(1,4-diazabicyclo[2.2.2]octane)]. The Kagomé net pillared structures are determined using comparable XRD patterns and confirmed by SEM. N adsorption isotherms at 77 K are used to evaluate their surface area and porosity properties. Furthermore, the gas uptake analyses(CO, CH and N) were measured at different temperatures and pressure up to 1 bar. Additionally, the heats of adsorption behavior of CO are given by fitting the isotherms with Dual-site Langmuir equations. Finally, the CO/CH and CO/N selectivities are determined by Ideal Adsorbed Solution Theory(IAST) to evaluate the gas separation properties of these materials.

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Study on the Pyrolysis Behavior of Polycarbosilane

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Journal of Wuhan University of technology(materials Science) 2015年第4期30卷 679-683页

作者：陈文怡 ZHOU Jian Materials Research and Testing Center Wuhan University of Technology State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

The pyrolysis behavior of polycarbosilane （PCS） and chemical reaction mechanism during the pyrolysis process were studied by thermogravimetric-mass spectrometry （TG-MS） combined with X-ray diffraction and infrared spectroscopic analysis methods. The experimental results indicate that the main gas phase products generated during pyrolysis of PCS in nitrogen atmosphere include H2, -CH3 and CH4. The heating rate has a large effect on the pyrolysis process of PCS, the lower heating rate releases more small molecule gases and gets bigger rate of pyrolysis mass loss, demonstrating that the lower heating rate is beneficial to fully pyrolysis of PCS and obtain ceramics products with better microstructure.

关键词： polycarbosilane pyrolysis behavior thermogravimetric-mass spectrometry heating ratemass loss

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Phosphorene Co‐catalyst Advancing Highly Efficient Visible‐Light Photocatalytic Hydrogen Production

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Angewandte Chemie 2017年第35期129卷

作者： Jingrun Ran Bicheng Zhu Shi‐Zhang Qiao School of Chemical Engineering University of Adelaide Adelaide SA 5005 Australia State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 P.R. China

Transitional metals are widely used as co‐catalysts boosting photocatalytic H 2 production. However, metal‐based co‐catalysts suffer from high cost, limited abundance and detrimental environment impact. To date, metal‐free co‐catalyst is rarely reported. Here we for the first time utilized density functional calculations to guide the application of phosphorene as a high‐efficiency metal‐free co‐catalyst for CdS, Zn 0.8 Cd 0.2 S or ZnS. Particularly, phosphorene modified CdS shows a high apparent quantum yield of 34.7 % at 420 nm. This outstanding activity arises from the strong electronic coupling between phosphorene and CdS, as well as the favorable band structure, high charge mobility and massive active sites of phosphorene, supported by computations and advanced characterizations, for example, synchrotron‐based X‐ray absorption near edge spectroscopy. This work brings new opportunities to prepare highly‐active, cheap and green photocatalysts.

关键词： Cokatalystoren Dichtefunktionalrechnungen Phosphoren Photokatalyse Wasserstofferzeugung

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Preface to Special Issue on Photocatalysis for celebrating the 20^(th) anniversary of Professor Jimmy C. Yu's return to Hong Kong and leading photocatalytic research there

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Chinese Journal of Catalysis 2015年第12期36卷 2047-2048页

作者：余家国林隽 State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Department of Chemistry Renmin University of China

It is a pleasure to dedicate this special issue of Chinese Journal of Catalysis（CJC）to *** ***,Choh-Ming Li Professor of Chemistry at The Chinese University of Hong *** is to celebrate the 20th anniversary of his re... 详细信息

关键词： pleasure Jimmy return photocatalytic celebrate distinguished helping anniversary strive

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Fluoridation and mechanical properties of hydroxyapatite with addition of TiF3, Al2O3and Fe2O3by sintering 15

Fluoridation and mechanical properties of hydroxyapatite wit...

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15th International Symposium on Eco-materials processing and Design, ISEPD 2014

作者： Asif, Muhammad Fu, Zheng Yi Khan, Shahzad Ahmad Wang, Wei Min Wang, Hao Wang, Yu Cheng Rehman, Sahibzada Shakir Ma, Rui Fang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783038352389

Fluoridated composite Hydroxyapatite biomaterial was prepared by sintering the hydroxyapatite Ca10(PO4)6. (OH)2[HA]powder with addition of titanium fluoride 30 wt. % -TiF3 and mixture of iron oxide and aluminum oxide [5 wt. %-Al2O3/Fe2O3;(5/1)]. The pellets were prepared by conventional sol-gel technique. The as-prepared samples were sintered at various temperatures and the effect of different temperature on grain size and mechanical properties has been investigated. The samples were sintered at various temperatures of 1100–1400 °C. After sintering, the sample’s mechanical properties such as compressive strength, bending strength, Vickers hardness were improved to be 49±0.26–103±0.26 MPa, 19.6±0.20–36.2±0.20 MPa, and 7.97±0.16–12.50±0.16 GPa with their grains size 4.76±0.10–17.63±0.10 μm and bulk densities 1.8944-2.2426 g/cm3. © (2015) Trans Tech Publications, Switzerland.

关键词： Hydroxyapatite

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Graphene Foams: A Bubble‐Derived Strategy to Prepare Multiple Graphene‐Based Porous materials (Adv. Funct. Mater. 23/2018)

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advanced Functional materials 2018年第23期28卷

作者： Rujing Zhang Ruirui Hu Xinming Li Zhen Zhen Zhenhua Xu Na Li Limin He Hongwei Zhu Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Department 5 P.O. Box 81‐5 AECC Beijing Institute of Aeronautical Materials Beijing 100095 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering and Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China International Center for Materials Nanoarchitectonics (WPI‐MANA) National Institute for Materials Science (NIMS) 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan

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