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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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HIERARCHICALLY POROUS STRUCTURED materialS AND THEIR ENHANCED CATALYTIC ACTIVE STABILITY

HIERARCHICALLY POROUS STRUCTURED MATERIALS AND THEIR ENHANCE...

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10th IUPAC International Conference on Novel materials and their synthesis NMS-X(IUPAC第十届新材料及其合成国际会议)

作者： A.YONG WANG B.WEI GENG C.RU-JIN CHENG D.NAN JIANG E.XIAO-YU YANG F.BAO-LIAN SU Laboratory of Inorganic Materials Chemistry University of Namur (FUNDP)61 Rue de BruxellesB-5 000 NamurBelgium State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122430070 WuhanChina State Key Laboratory of Advanced Technology for Material Synthesis and ProcessingWuhan University of TechnologyLuoshi Road 122430070 WuhanChina

As a hot topic in recent years, hierarchically porous structured materials have received plenty of attentions and lots of work has been done on their synthesis. For their outstanding properties, hierarchically porous structured materials have attractively potential applications in catalysis, controlled release, biomedicine, separation science and energy. We have synthesized several micro-meso-macro hierarchically porous structured materials through different methods. Except for some general characteristics of porous structured materials, these materials possess some common superiorities, and the highlight is that they have highly interconnected network of well-defined macropores with uniform mesoporosity and zeolitic micro-channels which can lead to highly active sites, larger external surface areas and fast diffusion of species. We applied these hierarchically porous structured materials to catalysis by encapsulating active species into macropores, such as enzymes,metallic oxide nanoparticles and metallic ion, which exhibite high catalytic activity, long-term stability, and excellent recycling behaviour. Hierarchically porous structured materials applied to catalysis are obviously more attractive and promising than tradition catalysts. What's more, other advanced properties can be exploited in the design of magnetic devices, sensors, and biofuel cell etc. which are based on hierarchically porous structured materials.

关键词： micro-meso-macro porous materials catalyst long-term stability

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Preparation and study of 0.7(Mg0.8Zn0.2)TiO3·0.3{Ba4Nd28/3Ti18O54·zBi2O3} microwave dielectric ceramics

Preparation and study of 0.7(Mg0.8Zn0.2)TiO3·0.3{Ba4Nd28/3T...

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12th China International Nanoscience and technology Symposium, and the Nano-Products Exposition, CINSTS 2013

作者： Ji, Xiao Li Zhai, Cheng Cheng Zhang, Song State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China

ISBN: (纸本)9783038350569

The (Mg0.8Zn0.2)TiO3(MZT) as the foundation is mainly studied to join high dielectric material Ba4Nd28/3Ti18O54·zBi2O3(BNT) to preparation microwave dielectric ceramic 0.7(Mg0.8Zn0.2)TiO3·0.3{Ba4Nd28/3Ti18O54·zBi2O3}(z=0.15, 0.18, 0.2) to improve dielectric properties of MZT. While Bi3+ could reduce the sintering temperature to make MZT and BNT composite in a lower sintering temperature (1200~1230 °C). According to the results of the dielectric properties, density, XRD and SEM tests of the obtained ceramics, we can find out that the amount of doped Bi3+ and the sintering temperature affected the structure and properties of the ceramics. The results show that when z=0.18, 0.7(Mg0.8Zn0.2)TiO3·0.3{Ba4Nd28/3Ti18O54·zBi2O3} sintering at 1230°C can get good dielectric properties: Εr =35.56, Qf =5811GHz, τf =-3.225 ppm/ °C. © (2014) Trans Tech Publications, Switzerland.

关键词： Dielectric properties

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Preface photocatalytic materials for energy and environmental applications

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Applied Surface Science 2014年第1期319卷 1-1页

作者： Yu, Jiaguo Jaroniec, Mietek State Key Laboratory of Advanced Technology For Material Synthesis and Processing Wuhan University of Technology Luoshi Road 122# Wuhan430070 China Department of Chemistry and Biochemistry KentState University KentOH44242 United States

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Bioreactors: A Stable, Reusable, and Highly Active Photosynthetic Bioreactor by Bio-Interfacing an Individual Cyanobacterium with a Mesoporous Bilayer Nanoshell (Small 17/2015)

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Small 2015年第17期11卷

作者： Nan Jiang Xiao-Yu Yang Zhao Deng Li Wang Zhi-Yi Hu Ge Tian Guo-Liang Ying Ling Shen Ming-Xi Zhang Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Wuhan 430070 China Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles 5000 Namur Belgium School of Material Science and Engineering Wuhan Institute of Technology 693 Xiongchu Avenue Wuhan 430073 China

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One-pot fabrication of FePt/reduced graphene oxide composites as highly active and stable electrocatalysts for the oxygen reduction reaction

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Carbon 2014年 68卷 755-762页

作者： Dan Chen Xin Zhao Shanshan Chen Huifeng Li Xinning Fu Qingzhi Wu Shipu Li Yu Li Bao-Lian Su Rodney S. Ruoff State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Biomedical Material and Engineering Center Wuhan University of Technology Wuhan 430070 China Department of Mechanical Engineering and the Materials Science and Engineering Program The University of Texas at Austin 1 University Station C2200 Austin TX 78712 USA Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles B-5000 Namur Belgium Clare Hall College University of Cambridge Cambridge UK

FePt nanoparticles (NPs)/reduced graphene oxide (rG-O) composites have been synthesized using a one-pot strategy without surfactants. Monodisperse FePt NPs were homogenously loaded onto rG-O sheets. By controlling the concentration of dispersed graphene oxide (GO), uniform FePt flower-like nanoclusters can be obtained. FePt/rG-O composites exhibited exceptionally high electrocatalytic performance in the activity and durability for the oxygen reduction reaction (ORR), much superior to that of the commercial Pt/C (60%). The straightforward synthesis of FePt/rG-O composites provides a low-cost and high performance catalyst for the ORR, which is also a promising strategy for the synthesis of various Pt-based bimetallic alloy/rG-O composites for potential uses in catalysis and energy fields.

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Self-assembly to monolayer graphene film with high electrical conductivity

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Journal of Energy Chemistry 2013年第1期22卷 52-57页

作者： Yi Lu Xiao-Yu Yang Bao-Lian Su Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Laboratory of Inorganic Materials Chemistry (CMI) University of Namur

Monolayer chemically converted graphene （CCG） nanosheets can be homogeneously self-assembled onto silicon wafer modified by 3-aminopr- opyl triethoxysilane （APTES） to form very thin graphene film. The CCG film was characterized by FT-IR, XRD, SEM, TEM and AFM. Results show that CCG sheets formed monolayer film after assembled onto silicon wafer and there is a very tight chemical bond between sheets and wafer. Furthermore, the electrical measurements revealed that the monolayer graphene film has an excellent electrical conductivity.

关键词： monolayer graphene self-assemble electrical conductivity

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Study on the automobile exhaust thermoelectric generator test bench

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2nd International Conference on materials Science and Engineering, ICMSE 2013

作者： Quan, Rui Tang, Xinfeng Quan, Shuhai State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Automation Wuhan University of Technology Wuhan 430070 China

ISBN: (纸本)9783037856444

In order to utilize the exhaust heat of internal combustion engine effectively and enhanceits fuel economy, a test bench used in Automobile Exhaust Thermoelectric Generator (AETEG) isdesigned in this paper, the main controller, temperature monitoring unit and single voltage monitoringunit of the control system are elaborated. Finally, several initial experiment results are provided, itreveals that prolonging the exhaust's transmission time and path appropriately can help raise thetemperature of heat exchanger's surface and enhance the output performance of AETEG, the methodadopted in this paper is feasible and the AETEG test bench designed is practical. © (2013) Trans Tech Publications, Switzerland.

关键词： Control systems

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