高选择性气体传感器的制备及其选择性和气敏机理的探讨

项目名称： 高选择性气体传感器的制备及其选择性和气敏机理的探讨

项目编号： No.21265020

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 阿布力孜·伊米提

作者单位： 新疆大学

项目金额： 60万元

中文摘要： 光波导传感器具有灵敏度高、响应快和室温下操作等优点，在国际上受到广泛关注。敏感层作为其重要组成部分直接影响传感器的选择性。本项目以磷酸亚铁锂、铁酸锌和聚乙烯吡咯烷酮等材料为基体，掺杂过渡金属及其氧化物，合成不同配比的复合材料；拟制备复合薄膜光波导气体传感器和电阻型薄膜气体传感器并比较它们的气敏特性，探讨电阻型薄膜气体传感器电阻变化与光波导气体传感器敏感层的折射率，吸收系数和透光率等特性参数之间的内在联系。对薄膜的晶体结构、表面形貌、掺杂物种类、相对含量及光学特性进行表征和分析。通过密度函数方法计算出敏感膜与被测气体之间的吸附能量。综合以上研究探讨光波导气体传感器的选择性响应和气敏机理；总结掺杂过渡金属及其氧化物对传感器选择性响应的影响。这些研究将为光波导气体传感器敏感层的设计提供实验数据，并有助于推动光波导气体传感器的开发和产业化。

中文关键词： 选择性响应；光波导气敏元件；气敏材料；光电气敏机理；

英文摘要： The optical waveguide (OWG) sensor have been attracted widespread interest around the world owing to the potentials for high sensitivity, fast response time, and monitoring at room temperature. As the most important component of OWG, the sensitive layer would directly affect to the selectivity of sensor. In this project, the Lithium Iron Phosphate, Zinc Ferrite, Polyvinyl Pyrrolidone (PVP) will be selected as basic materials, and the composite materials which doped different amount of transition metal and their oxides will be synthesized. The thin film OWG gas sensor and resistance-type gas sensor will be prepare using this composite materials, and compare their gas sensing properties; study the intrinsic link between the change in resistance of the resistance-type thin film gas sensors with the characteristic parameters such as the refractive index, absorption coefficient and transmittance of sensing layer of OWGs. We will analyze the crystal structure, surface morphology, chemical composition, relative contents and optical properties of thin film. The adsorption energy between the sensitive film and the measured gas will be calculated using the Density function theory (DFT). Sum up above studies, we would discuss the selectivity and gas sensing mechanism of optical waveguide sensor, and will summarize the infl

英文关键词： Selective response；Optical Waveguide gas sensing element；Gas sensing material；Optic-electric gas sensing mechanism；