高表面能晶面暴露的金属氧化物纳米晶体合成及性能研究

项目名称： 高表面能晶面暴露的金属氧化物纳米晶体合成及性能研究

项目编号： No.21201072

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 殷竟洲

作者单位： 淮阴师范学院

项目金额： 23万元

中文摘要： 如何控制晶体生长以构建性能优越的纳米材料，是当今材料研究领域一个重要的研究方向和热点。由于晶体存在各向异性，决定了不同晶面上的原子排布、成键方式都不尽相同，从而导致不同的晶面表现出不同的物理和化学性质。高表面能晶面暴露的纳米材料因其开放的表面结构和高密度的低配位台阶及扭结原子，在催化、传感等方面具有优异的性能。金属氧化物纳米材料具有丰富的物理化学性质和广泛的应用，是材料化学的重要研究对象。如何控制合成具有高表面能晶面暴露的金属氧化物纳米材料，进一步提高其物理和化学性能，对于基础研究和技术应用都具有十分重要的意义。鉴于此，本项目拟采用液相法，将天然高分子表面活性剂引入到反应体系中，围绕选择合适的前驱体、模板剂、配位剂及矿化剂等反应条件，来控制纳米晶体的合成，期望获得具有高表面能晶面暴露的纳米晶体。并在此基础上，通过对其光催化、气敏等方面的性能测试，构建性能优异的金属氧化物纳米材料。

中文关键词： 金属氧化物；复合氧化物；暴露晶面；控制合成；性能

英文摘要： Controls on the growth of nanocrystals with superior performances have been becoming a hot research topic in the fields of materials science. Anisotropy is a basic property of single crystals, and different facets or surfaces have different atomic structures and dangling bonds, which may result in different physical/chemical properties. Metal oxide nanostructures have exhibited strong application potentials, and become a popular research subject in materials chemistry. Nanocrystals with exposed high-energy facets have an open surface structure and possess a high density of low-coordinated step and kink atoms. Possession of such features can lead to exceptional properties in many fields such as catalysis and sensors. Therefore, it is believed that the controllable synthesis of metal oxide nanostructures with exposed high-energy facets to further tune their chemical and physical properties will benefit the improvement of their physical/chemical properties for basic research and technology applications. In this project, we will try to synthesize metal oxide nanocrystals with exposed high-energy facets using solution-based methods in the presence of natural polymeric surfactants by changing the reaction conditions, such as precursor, template, complexant, and mineralization agents. The photocatalytic and gas-sensing

英文关键词： metal oxide；mixed metal oxide；exposed facets；controllable synthesis；properties