一维氧化铟基复合核壳纳米纤维的制备及其室温气敏传感性质研究

项目名称： 一维氧化铟基复合核壳纳米纤维的制备及其室温气敏传感性质研究

项目编号： No.61204015

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 徐琳

作者单位： 吉林大学

项目金额： 32万元

中文摘要： 硫化氢是矿井环境中常见的一种易燃易爆毒性气体，对其进行安全有效探测是保护矿工安全和井下资源的重要手段。目前，针对矿井环境特点获得可在室温下准确快速地探测出稀薄硫化氢气体的传感器件仍然是研究的难点。本项目拟采用静电纺丝法制备一系列一维贵金属(Au, Pt)/多孔稀土掺杂氧化铟核壳纳米纤维并构筑传感器件。研究贵金属内核对氧化铟壳层的敏化作用和核壳间的相互作用机理；研究稀土元素的掺杂种类和浓度对氧化铟带隙、电学性质与传感特性的调控规律；研究金属内核和稀土的引入对气敏传感机制的影响；研究室温下灵敏度与响应时间之间相互制约和依赖的内在原因；通过反应机制的热力学控制获得对稀薄硫化氢具有高灵敏度快速响应的器件。本项目将获得新一类的高性能复合纳米氧化铟传感器，并为其在矿井等封闭复杂环境内对硫化氢气体检测的实际应用提供重要的理论基础与实验依据。

中文关键词： 静电纺丝法；核壳结构；金属内核；稀土掺杂；气敏传感

英文摘要： In mine environment, hydrogen sulfide is a common, flammable, explosive, and toxic gas. To detect hydrogen sulfide in an effective and safe way is very important for protecting the security of mine workers and underground resources. At present, how to quickly and accurately identify dilute hydrogen sulfide gas at room working temperature in the mine environment is still a difficulty of the current research. This project intends to fabricate a series of one-dimensional noble metals (Au, Pt)/porous rare earth doped indium oxide core-shell nanofibers by electrospinning and build the corresponding gas sensors. In-depth study the sensitizing effect of noble metal core on indium oxide shell and the interaction mechanism between core-shell materials, realize the modulation laws of band gap, electronic and gas sensing properties due to the introduction of rare earth elements with different kinds and concentrations, investigate the influence of metal core and rare earth on sensing mechanism, clear the mutual constraint and dependency relationship between the sensitivity and response and recovery time at room operating temperature, through controlling the thermodynamic of the reaction mechanism to get the gas sensor with high sensitivity, and short response and recovery time to dilute hydrogen sulfide at room working temp

英文关键词： Elctrospinning；Core-shell structure；Noble metal core；Rare earth doped；Gas sensing properties