检索结果-内蒙古大学图书馆

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

Hierarchically Porous Carbon Supported Oxide Nanoparticles: ...

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

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

Slow Photon Enhanced Photocatalytic Activity of ZnO Inverse ...

引用

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

来源：评论

学校读者我要写书评

暂无评论

synthesis of NiCr_2O_4 spinel coatings with high emissivity by plasma spraying

引用

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

来源：评论

学校读者我要写书评

暂无评论

Properties, Phases and Microstructure of Microwave Sintered W-20Cu Composites from Spray Pyrolysis-continuous Reduction Processed Powders

引用

Journal of Wuhan University of technology(materials Science) 2012年第1期27卷 38-44页

作者： TAO Jianqin SHI Xiaoliang State Key Laboratory of Advanced Technology for Materials Synthesis&Processing Wuhan University of TechnologyWuhan 430070 China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan 430070China

The effects of microwave sintering on the properties, phases and microstructure of W-2OCu alloy, using composite powder fabricated by spray pyrolysis-continuous reduction technology, were investigated. Compared with the conventional hot-press sintering, microwave sintering to W-2OCu composites could be achieved with lower sintering temperature and shorter sintering time. Furthermore, microwave sintered W-Cu composites with high densification, homogenous microstructure and excellent properties were obtained. Microwave sintering could also result in finer microstructures. ：~

关键词： W-2OCu composite powder spray pyrolysis-continuous reduction microwave sintefing

来源：评论

学校读者我要写书评

暂无评论

Ultra-fast densification of CNTs reinforced alumina based on combustion reaction and quick pressing

引用

Science China(Technological Sciences) 2012年第2期55卷 484-489页

作者： FU ZhengYi HUANG LiWei ZHANG JinYong TODD Richard State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Materials University of OxfordOxford OX13PHUK

An ultra-fast densification method based on high heating rate from the combustion reaction for producing carbon nanotubes （CNTs） reinforced alumina ceramics is reported. The heat generated by combustion reaction is adopted to act as a high temperature source to the sample, which results in a heating rate of 1660℃/min of the sample. Then a great mechanical pressure is applied to the sample when the sample gets the expected temperature. The densification process is finished in several minutes. The results indicate that the densification method is beneficial to protect the CNTs from destruction and creates good interracial combination between the nanotubes and the matrix. With the addition of 1 wt% CNTs, the fracture toughness of the ceramics prepared increases about 50%.

关键词： carbon nanotubes alumina combustion reaction quick pressing

来源：评论

学校读者我要写书评

暂无评论

The Status and Trend of PEMFC Membrane Electrode Assembly

The Status and Trend of PEMFC Membrane Electrode Assembly

引用

第五届世界氢能技术大会(WHTC2013)

作者： Yongcheng Ai Jianjun Tang Zhaohui Wan Mu Pan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei 430070 China WUT New Energy Co. Ltd. Wuhan Hubei 430223 China WUT New Energy Co. Ltd. Wuhan Hubei 430223 China

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：