金属氧化物表面结构的精细调控与化学传感器设计

项目名称： 金属氧化物表面结构的精细调控与化学传感器设计

项目编号： No.21275016

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 王志华

作者单位： 北京化工大学

项目金额： 82万元

中文摘要： 随着社会的发展，人们对气体传感器性能不断提出新的要求，气敏材料表面结构的精细调控将成为提高传感性能的新手段。本课题将采用非平衡激光诱导气相沉积、微波水热等技术制备不同种类金属氧化物纳米材料，通过掺杂、焙烧等后处理手段进一步调控材料表面结构。检测材料气敏性能并借助催化剂相关原位分析技术，深入研究材料表面组成及结构对其分析检测氮氧化合物等有毒、有害气体性能的影响，结合理论计算，构建材料制备、微观结构与气敏性能之间的关联；掌握材料响应过程的物理、化学规律并从原子水平上理解气敏响应机制。以传感性能为导向，通过表面结构的精细调控提高材料灵敏度、选择性、稳定性等综合性能，实现新型传感器的优化设计。课题研究结果不仅有助于气敏响应机制的最终确立，推动相关基础研究，为传感器的实际应用提供技术基础和理论依据，还将有益于环境分析检测技术的发展，从而满足日益提高的环境监测标准。

中文关键词： 传感器；表面；金属氧化物；敏感机制；纳米材料

英文摘要： With the development of the world, more precise sensor is urgently needed. Fine regulation of the surface structure of metal oxides will become a new technology for improving the performance of sensor. In this project, laser induced vapor deposition and microwave hydrothermal method will be used to synthesize metal oxides. Doping and aftertreatment technologies will be used to regulate their suface structures. Employing with different in-situ characterization technologies used for catalyst，the influnce of the surface structures of the materials on the gas sensing properties, especially for hazardous gases will be investigated. Combining with theoretical calculation, the relationships among the preparation parameters, microstructures and sensing properties will be found. Moreover, a fundamental, atomic-level understanding of sensing processes will be built. According the required sensing properties, the sensitivity, selectivity and stability of materials will be improved by the fine regulation of the surface structures, and the engineering of novel sensor will be realized finally. Therefore, the research results will be helpful to explain the sensing mechanism and develop relative theory, and could provide basic technology and theory foundation for the fabrication and application of the sensor. In addition, this

英文关键词： sensor；surface；metal oxide；sensing mechanism；nanomaterial