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1st Euro-Asia Zeolite Conference

作者： Bao-Lian Su Li-Hua Chen Laboratory of Inorganic Materials Chemistry University of Namur61 rue de BruxellesB-5000NamurBelgium State key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi Road

The new type of the hierarchically structured porous solid-acid catalysts described in this presentation possess a remarkable pore system,encompassing well-defined macrochannels, interconnected mesopores,intracrystalline mesopores,and tunable zeolite(ZMS-5,Beta,...) micropores[1-5].These hierarchical micro-meso-macroporous zeolitic catalysts with improved stability have been synthesized via a quasi solid state chemical crystallization ***,the catalyst exhibits very strong acidity

关键词： Hierarchically Structured Zeolites with Interconnected Three Level Micro-Meso-Macro Pore Structure:from synthesis to Catalysis

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Crystallization kinetics of mullite from single-phase gel

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Gongneng Cailiao/Journal of Functional materials 2013年第24期44卷 3571-3575页

作者： Zhang, Gui-Min Chen, Yang-Bo Fu, Zheng-Yi Wang, Yu-Cheng Ren, Lin Department of Chemistry School of Science Wuhan University of Technology Wuhan 430070 China Wuhan Shangyuan Environmental Technical Co. LTD Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The crystallization kinetics of mullite from single-phase gel were studied using a non-isothermal thermal analysis method. The microstructure changes were investigated by X-ray power diffraction (XRD), transmission electron microscopy (TEM) and 27Al nuclear magnetic resonance (NMR) spectroscopy. The results show mullite crystallization begins from 950°C. The crystallization process confroms to random nuclei production and the following unclei growth model of n-dimension Avrami-Erofeev. The activation energy Ea and the pre-exponential factor A of mullite crystallization are 1086.34 kJ/mol and 9.33×1042 s-1, respectively. The differential expression of the corresponding mechanism function was f (α) =n(1-α)[-ln(1-α)]n-1/n, n= 3.37. The nucleation rates are non-uniform which decrease with the time t in crystallization process. Nucleation was the dominant controlling step at about 980°C. Nucleation-growth becomes more predominant at about 1000°C. The rates of the grain growth are controlled by diffusion.

关键词： Thermoanalysis

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Hierarchically Porous Carbon Supported Oxide Nanoparticles: synthesis, Characterization and Applications

Hierarchically Porous Carbon Supported Oxide Nanoparticles: ...

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the 4th International Conference on Structured Catalysts and Reactors (ICOSCAR-4)第4届催化剂和反应器的结构国际会议

作者： Chunxia Zhao Yunxia Yang Ken Chiang Nick Burke CSIRO Earth Science and Resource Engineering VIC 3168 Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

Hybrid porous nanocomposites have received much attention during recent years because of their unique properties including well-controlled pore structures, high surface areas, and large and tunable pore sizes which facilitate the diffusion of molecular entities inside the pores [1].Porous carbon-based nanocomposites are interesting owing to the potential applications as catalysts, electrodes and *** has been shown in the literature that the yields of hydrocarbons produced from FischerTropsch process can be improved by using catalytic materials with controlled nanostructure and particle size [2].

关键词： Hierarchically porous structure Carbon Oxieds Composites Catalysis Application

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Slow Photon Enhanced Photocatalytic Activity of ZnO Inverse Opal Film Synthesized by Sol-gel Method

Slow Photon Enhanced Photocatalytic Activity of ZnO Inverse ...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Jing Liu Jun Jin Shao-zhuan Huang Li Wang Chao Wang Yu Li Bao-lian Su Laboratory of Inorganic Materials Chemistry (CMI) The University of Namur (FUNDP)61 rue de BruxellesB-5000 NamurBelgium Laboratory of Living Materials at State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi Road430070WuhanHubeiChina Laboratory of Living Materials at State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology122 Luoshi Road430070WuhanHubeiChina Department of Chemistry University of CambridgeLensfield RoadCambridge CB2 1EWUK

Recently, inverse opal structures, which have many potential applications in catalysts, separations, sensors, bioscience and photonics for their unique advantages such as highly ordered pore structure, large specific ... 详细信息

关键词： ZnO inverse opal film sol-gel method slow-photon photocatalysis

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Tailoring the Porous Hierarchy and Dimension of Styrene-based Polymers by Spontaneous Inorganic Nano-Templating

Tailoring the Porous Hierarchy and Dimension of Styrene-base...

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International Conference on Nanoscience & technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)

作者： Ge Tian Jie Hu Shengchun He Jie ying Siming Wu Yong Wang Xiaoyu Yang Baolian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi Road430070WuhanChina Laboratory of Inorganic Materials Chemistry (CMI)The University of Namur (FUNDP)61rue de BruxellesB-5000 Namur (Belgium) State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology122 Luoshi Road430070WuhanChina Laboratory of Inorganic Materials Chemistry (CMI) The University of Namur (FUNDP)61rue de BruxellesB-5000 Namur (Belgium)

Nanoporous polymers, especially these presenting multimodal or multiscale porosity are of considerable interest because of their present advantages:hydrophobic surface, flexibility, biocompatiblity, easy functional modification, well regularity and so *** traditional templating techniques have been extented to fabricate the hierarchical structured polymer, such as breath figure, colloidal crystal, supercritical fluids, and emulsion templating.

关键词： Styrene-based polymers metal alkoxide/alkyl spontaneous inorganic nano-template tailored porous structure

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Structure and electrical properties of ternary BiFeO_(3)-BaTiO_(3)-PbTiO_(3) high-temperature piezoceramics

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Journal of advanced Ceramics 2012年第3期1卷 227-231页

作者： Zhonghua YAO Ying LIU Zhe SONG Zhijian WANG Hua HAO Minghe CAO Zhiyong YU Hanxing LIU State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Key Laboratory of Advanced Technology for Specially Functional Materials Ministry of EducationWuhan University of TechnologyWuhan 430070China

In the current work,the bulk ternary(0.85-x)BiFeO3-xBaTiO3-0.15PbTiO3(BF-BTx-PT,x=0.08-0.35)system has been studied as a potential high-temperature *** with various content of BT were prepared via solid-state route,and pure perovskite phase was confirmed by X-ray *** temperature dependence of dielectric constants confirmed the decrease of Curie temperature with increasing BT *** was found that the morphotropic phase boundary(MPB)composition of BF-BTx-PT ceramics was in the vicinity of x=0.15,which exhibits optimal properties with piezoelectric constant d33 of 60 pC/N,high Curie temperature of 550℃,and low sintering temperature of 920℃.Measurements also showed that the depoling temperature was 300℃,about 150℃higher than that of commercialized PZT ceramics,which indicated good temperature ***-BTx-PT ceramics are promising candidates for high temperature applications.

关键词： ceramics piezoelectric materials barium titanate perovskite ferroelectrics

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Selective surface functionalization at regions of high local curvature in graphene

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Chemical Communications 2013年第7期49卷 677-679页

作者： Wu, Qingzhi Wu, Yaping Hao, Yufeng Geng, Jianxin Charlton, Matthew Chen, Shanshan Ren, Yujie Ji, Hengxing Li, Huifeng Boukhvalov, Danil W. Piner, Richard D. Bielawski, Christopher W. Ruoff, Rodney S. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Center Wuhan University of Technology Wuhan 430070 China Department of Mechanical Engineering Department of Materials Science Department of Engineering Program The University of Texas at Austin Austin TX 78712 1 University Station C2200 United States Department of Chemistry and Biochemistry The University of Texas at Austin Austin TX 78712 1 University Station A1590 United States School of Computational Sciences Korea Institute for Advanced Study Seoul 130-722 South Korea ) School of Chemical and Biological Engineering Seoul National University Seoul 151-742 South Korea

Monolayer graphene was deposited on a Si wafer substrate decorated with SiO2 nanoparticles (NPs) and then exposed to aryl radicals that were generated in situ from their diazonium precursors. Using micro-Raman mapping, the aryl radicals were found to selectively react with the regions of graphene that covered the NPs. The enhanced chemical reactivity was attributed to the increased strain energy induced by the local mechanical deformation of the graphene. © The Royal Society of Chemistry.

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Preparation of high emissivity NiCr_2O_4 powders with a spinel structure by spray drying

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International Journal of Minerals,Metallurgy and materials 2012年第2期19卷 173-178页

作者： Xu-dong Cheng Jie Min Zhen-qi Zhu Wei-ping Ye State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Materials Science and Technology Wuhan University of Technology Wuhan 430070 China

Spray-drying was used to produce the high emissivity NiCr2O4 powders with a spinel structure. Preliminary investigations focused on fabricating the high emissivity powders for infrared radiation coatings and finding the relationship between microstructure and emissivity. The NiCr2O4 powders were characterized for composition, microstructure, and infrared emissivity by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, infrared radiant instrument, and Fourier transform infrared spectra （FT-IR）. Thermogravimetry and differential thermal analysis show that the appropriate baking temperature for NiCr2O4 powder preparation is about 1200？C. The emissivity measurement and FT-IR spectra show that, because of the special spinel structure, the NiCr2O4 powders have a high emissivity about 0.91. Spray-drying is a suitable method to produce the high emissivity ceramic powders.

关键词： emissivity infrared radiation spray drying powders ceramic materials nickel compounds chromium compounds

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A Facile synthesis of Ag Modified ZnO Nanocrystals with Enhanced Photocatalytic Activity

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Journal of Wuhan University of technology(materials Science) 2012年第4期27卷 615-620页

作者：董艳玲王苹 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Department of Chemistry School of Science Wuhan University of Technology

Ag modified ZnO （Ag/ZnO） nanocrystals were prepared by a facile and low temperature wet chemical method. The phase structures, morphologies, and optical properties of the as-prepared samples were characterized by X-ray powder diffraction （XRD）, field-emission scanning electron microscopy （FESEM）, high-resolution transmission electron microscopy （HRTEM）, the Brumauer-Emmett-Teller （BET） surface area, UV-vis diffuse reflectance spectroscopy and photoluminescence （PL） spectra, respectively. The photocatalytic performance of Ag/ZnO with diffent Ag contents was measured with the degradation of methyl orange （MO） at room temperature under UV light irradiation. The experimental results indicated that the well-crystalline ZnO nanopaticles with a size of ca. 4.5 nm exhibited a high photocatalytic activity for the degradation of MO with the apparent rate constant （k） of 1.57 ×10-2 min-1, and the photocatalytic activities of ZnO were further enhanced by modification with silver. When the Ag loading was 3mol%, Ag/ZnO showed the highest photocatalytic acitivity with a k value of 5.452×10-2 min-1, which is 3.5 and 2.5 time more than that of ZnO and commercial P25, respectively.

关键词： ZnO Ag nanocrystal photocatalyst

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synthesis of NiCr_2O_4 spinel coatings with high emissivity by plasma spraying

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International Journal of Minerals,Metallurgy and materials 2012年第3期19卷 266-270页

作者： Zhen-qi Zhu Xu-dong Cheng Wei-ping Ye Jie Min School of Materials Science and Technology Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Air plasma spraying （APS） was used to produce high emissivity coatings with a NiCr204 spinel structure. The relationship between the emissivity and the crystal structure was investigated. X-ray diffraction （XRD） analyses show that NiCr204 spinel has been fabri- cated with the space group Fd3m. Scanning electron microscope （SEM） photographs show that the coating consists of a laminated structure with homogeneous grains and high porosity because of the unique feature of plasma spraying. The emissivity measurement and Fourier transformation infrared radiation （FT-IR） spectra show that NiCr204 has a high emissivity of about 0.91 because of its special spinel structure APS is a suitable method to produce high emissivity coatings.

关键词： infrared radiation coatings plasma spraying emissivity crystal structure industrial ftLrnaces

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