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Cover Feature: Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD-Developed Two-Dimensional WO3(ChemElectroChem 2/2018)

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ChemElectroChem 2017年第2期5卷

作者： Zihan Wei Zhenyin Hai Mohammad Karbalaei Akbari Prof. Jie Hu Lachlan Hyde Prof. Stephen Depuydt Prof. Francis Verpoort Prof. Serge Zhuiykov Ghent University Global Campus Department of Applied Analytical & Physical Chemistry 119 Songdomunhwa-ro Yeonsu-gu Incheon South Korea Micro and Nano System Research Center Key Lab of Advanced Transducers and Intelligent Control System (Ministry of Education) & College of Information Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi PR China Factory of the Future Swinburne University of Technology Hawthorn Australia National Research Tomsk Polytechnic University Lenin Avenue 30 634050 Tomsk Russian Federation Laboratory of Organometallics Catalysis and Ordered Materials State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Chemical and Material Engineering Wuhan University of Technology Wuhan P.R. China

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Highly Monodispersed PtPd bimetallic Nanocomposites with a Novel One Particle@One Cell Structure

Highly Monodispersed PtPd bimetallic Nanocomposites with a N...

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2015年第四届国际新材料大会

作者： Jie Ying Wang Yong Xiao-Yu Yang Bao-Lian Su State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Laboratory of Inorganic Materials Chemistry University of Namur (FUNDP)

Pt-based nanostructures have attracted tremendous research attention owing to their excellent performance in many applications,such as proton-exchange membrane(PEM) fuel *** Pt-based alloy which not only reduce the content of Pt,but also usually show a superior performance compared with pure Pt *** improve the stability,durability and utilization efficiency of metals,various types of nano-architectures,especially nanoporous structure,have been employed as catalyst *** avoiding the blocking of channels between pores and aggregation of nanoparticles,it's very necessary to synthesize uniform Pt-based bimetallic nanoparticles highly monodispersed in nanostructures for maximizing the activity of a Pt-based ***,we synthesized highly monodispersed PtPd nanoparticles encapsulated in a unique "one particle@one cell" structure by adjusting the viscosity of solvents using mesocellular *** nanocomposites exhibit excellent electrocatalytic activity(over 4 times mass and specific activities than the commercial Pt/C catalyst).Importantly,this nanocatalyst shows no obvious change of structure and only 29.5% loss in electrochemically active surface area after 5000 potential *** synthetic approach is facile and general for the design of practical catalysts,which could combine functionalities in all of the compositions.

关键词： Highly Monodispersed PtPd bimetallic Nanocomposites with a Novel One Particle@One Cell Structure

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Preparation of Layered Potassium Titanate Whiskers with Large Length-diameter Ratio by KDC Method

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Journal of Wuhan University of technology(materials Science) 2014年第4期29卷 669-673页

作者：吉晓莉 WU Shijiang 章嵩 ZHAO Xiujian State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

Pure K2Ti4O9 whiskers were prepared by KDC（Kneading-Drying-Calcination） method with TiO2 and K2CO3 as raw materials. The influences of TiO2/K2CO3 molar ratio（RT/K）, calcination temperature（TC） and cooling process on phase composition and morphology of the whiskers were investigated by TG-DSC（thermo gravimetric-differential scanning calorimeter）, XRD（X-ray diffraction）, and SEM（scanning electron microscope）. Pure K2Ti4O9 potassium titanate whiskers with large length-diameter ratio（r）（over 250） can be obtained at RT/K = 2.9 and TC = 950 ℃.

关键词： KDC（kneading-drying-calcination） method potassium titanate whiskers TiO2/K2CO3 molar ratio（RT/K） length-diameter ratio（r）

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Cover Feature: Ring-Opening Polymerization ofl-Lactide to Cyclic Poly(Lactide) by Zeolitic Imidazole Framework ZIF-8 Catalyst (ChemSusChem 21/2017)

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ChemSusChem 2017年第21期10卷 4120-4120页

作者： Zhixiong Luo Dr. Somboon Chaemchuen Kui Zhou Prof. Dr. Francis Verpoort Laboratory of Organometallics Catalysis and Ordered Materials State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Chemical and Material Engineering Wuhan University of Technology Wuhan P. R. China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 P .R. China Department of Inorganic and Physical Chemistry Ghent University Krijgslaan 281-S3 9000 Ghent Belgium School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China National Research Tomsk Polytechnic University Lenin Avenue 30 Tomsk 634050 Russian Federation

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Preparation of K2Ti4O9 nanowhiskers via stearic acid method

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materials Research Innovations 2015年 19卷 340-344页

作者： Zhang, S. Wu, J. Ji, X.L. Yi, F. Hu, P.F. State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Shool of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Wuhan430070 China

K2Ti4O9 nanowhiskers were synthesised via stearic acid method by using potassium hydroxide (KOH) and tetrabutyl titanate (Ti(OC4H9)4) as raw materials. The effects of molar ratio of tetrabutyl titanate and KOH (RT/K), calcination temperature (TC) on composition, morphology of products have been investigated. RT/K showed a significant effect on length to diameter ratio (RL/D) of the nanowhiskers. K2Ti4O9 nanowhiskers with RL/D greater than 20 were prepared at RT/K = 1 and TC = 850°C. Reaction mechanism of K2Ti4O9 nanowhiskers also has been studied. © 2015 W. S. Maney & Son Ltd.

关键词： Titanium compounds

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Applications of hierarchically structured porous materials from energy storage and conversion, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine

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Chemical Society reviews 2016年第12期45卷 3479-563页

作者： Ming-Hui Sun Shao-Zhuan Huang Li-Hua Chen Yu Li Xiao-Yu Yang Zhong-Yong Yuan Bao-Lian Su State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China. chenlihua@*** baoliansu@***. Collaborat Innovat. Ctr. Chem. Sci. & Engn. Tianjin Key Lab. Adv. Energy Mat. Chem. Minist. Educ. Coll. Chem. Nankai Univ. Tianjin 300071 China. State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 China. chenlihua@*** baoliansu@*** and Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium. bao-lian.su@unamur.be and Clare Hall University of Cambridge Cambridge CB2 1EW UK. bls26@cam.ac.uk.

Over the last decade, significant effort has been devoted to the applications of hierarchically structured porous materials owing to their outstanding properties such as high surface area, excellent accessibility to active sites, and enhanced mass transport and diffusion. The hierarchy of porosity, structural, morphological and component levels in these materials is key for their high performance in all kinds of applications. The introduction of hierarchical porosity into materials has led to a significant improvement in the performance of materials. Herein, recent progress in the applications of hierarchically structured porous materials from energy conversion and storage, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine is reviewed. Their potential future applications are also highlighted. We particularly dwell on the relationship between hierarchically porous structures and properties, with examples of each type of hierarchically structured porous material according to its chemical composition and physical characteristics. The present review aims to open up a new avenue to guide the readers to quickly obtain in-depth knowledge of applications of hierarchically porous materials and to have a good idea about selecting and designing suitable hierarchically porous materials for a specific application. In addition to focusing on the applications of hierarchically porous materials, this comprehensive review could stimulate researchers to synthesize new advanced hierarchically porous solids.

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Mechanical alloying and spark plasma sintering of CoCrFeNiMnAl high-entropy alloy

Mechanical alloying and spark plasma sintering of CoCrFeNiMn...

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作者： Wang, Chao Ji, Wei Fu, Zhengyi Department of Architecture and Material Engineering Hubei University of Education Wuhan430205 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

An equiatomic CoCrFeNiMnAl high-entropy alloy was synthesized by mechanical alloying, and alloying behaviors, microstructure and annealing behaviors were investigated. It was found that a solid solution with refined microstructure of 20 nm in grain size could be obtained after 30 h milling. As-milled powder transformed into a face-centered cubic phase above 500 °C. The as-milled powder was subsequently consolidated by spark plasma sintering at 800 °C, BCC phase and FCC phase coexisted in the consolidated HEA, which had excellent properties in Vickers hardness of 662 HV and compressive strength of 2142 MPa. © 2014 The Society of Powder technology Japan. Published by Elsevier B.V. and The Society of Powder technology Japan. All rights reserved.

关键词： Mechanical alloying

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Graphene-based composite photocatalyst for solar fuel production

Graphene-based composite photocatalyst for solar fuel produc...

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中国化学会第29届学术年会

作者： Jiaguo Yu State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

The production of solar fuels by solar energy conversion is considered to be one of major strategies for solving the global energy and environmental problems in the future. Photocatalytic water splitting for H2 production and CO2 reduction for methane formation have become important and promising methods for clean, economical, and renewal production of solar fuels by using solar light since Fujishima and Honda first reported the photoelectrochemical water splitting on a TiO2 electrode in 1972. Among various semiconductors, titania(TiO2) has attracted special attention because of its strong oxidizing and reduction power, cost effectiveness, lack of toxicity, and high photochemical corrosive resistance. Usually, the photocatalytic H2-production activity on TiO2 is significantly dependent on the type and amount of co-catalyst because bare TiO2 has poor photocatalytic H2-Production activity. It is well-known that the loading of Pt as a co-catalyst on TiO2 significantly enhances H2-production activity for photocatalytic water splitting in the presence of sacrificial reagents. However, Pt is a rare and expensive noble metal. Therefore, alternative co-catalysts based on non-precious metals and earth-abundant materials have been actively pursued. Graphene-based nanocpmposite photocatalysts have recently caused tremendous interest as a viable alternate to increase photocatalytic H2-production and CO2-reduction performance in converting solar energy into chemical energy. The use of graphene as cocatalyst and support to enhance the H2-production activity of photocatalysts has been confirmed due to its unique two-dimensional conjugated structure and electronic properties. In this talk, I will present our recent work on the design and fabrication of graphene-based nanocomposite photocatalytic materials for H2 production and CO2 reduction. The rational designs for high-performance photocatalytic materials using graphene-based materials are described. Our work also demonstrates gr

关键词： Graphene-based composite photocatalyst for solar fuel production

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Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO_2 to solar fuel

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Science China materials 2014年第1期57卷 70-100页

作者：李鑫温九青刘敬祥方岳平余家国 State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology College of Science South China Agricultural University Department of Physics Faculty of Science King Abdulaziz University

The shortage of fossil fuels and the disastrous pollution of the environment have led to an increasing interest in artificial photosynthesis. The photocatalytic conversion of CO2 into solar fuel is believed to be one of the best methods to overcome both the energy crisis and environmental problems. It is of significant importance to efficiently manage the surface reactions and the photo-generated charge carriers to maximize the activity and selectivity of semiconductor photocatalysts for photoconversion of CO2 and H2 O to solar fuel. To date, a variety of strategies have been developed to boost their photocatalytic activity and selectivity for CO2 photoreduction. Based on the analysis of limited factors in improving the photocatalytic efficiency and selectivity, this review attempts to summarize these strategies and their corresponding design principles, including increased visible-light excitation, promoted charge transfer and separation, enhanced adsorption and activation of CO2, accelerated CO2 reduction kinetics and suppressed undesirable reaction. Furthermore, we not only provide a summary of the recent progress in the rational design and fabrication of highly active and selective photocatalysts for the photoreduction of CO2, but also offer some fundamental insights into designing highly efficient photocatalysts for water splitting or pollutant degradation.

关键词： CO2 二氧化碳光催化剂 Ti

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Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 ceramics

Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 cera...

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Yue Sun Hanxing Liu Hua Hao Shujun Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Material Research Institute The Pennsylvania State University USA

BaTiO 3 -based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na 0.5 Bi 0.5 TiO 3 (NBT) component in BaTiO 3 (BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb 2 O 5 dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb 2 O 5 addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit.

关键词： Niobium Ceramics Grain boundaries Dielectrics Impedance Temperature Conductivity

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