基于核壳纳米粒子@金属有机框架超灵敏气体传感器的制备及其机理研究

The problem of environmental pollution has become the focus in two meetings. Meanwhile, it is also a major issue that affects human survival and health in the 21st century. Therefore, the demanded for the quality of gas sensor of toxic and harmful gas has become higher and higher. Thus far, most of the gas sensors are focused in the materials of semiconductor. However, the sensitivity and the selectivity properties of them are not good enough and a high temperature condition is also needed. Herein, metal organic frameworks (MOFs) is introduced to the system of nanoparticle. Thanks to the core-shell structure, the aggregation of nanoparticles is avoided. Besides improving the stability, the unique collaborative performance of these two compositions of this core-shell nanoparticle@metal organic framework (MOFs) is also realized. Combined the results of experiment with the stimulation of theory, the mechanism and the key technology of this core-shell structure nanoparticle@MOFs gas sensor will be investigated and the model of the sensitivity will be established. This project will not only open a new way to the theory of design and synthesis of high quality of nano gas sensor, but also it involves nano thehnology, microelectronics, analytical chemistry and other multidisciplinary and cutting-edge theory and technique, which is also meaningful.

环境污染问题已成为近年来两会上关注的焦点，是21 世纪影响人类生存与健康的重大问题。人们对有毒、有害气体传感器提出了更高的要求。目前研究的气体传感器主要集中在半导体材料气体传感器，但是它们存在灵敏度低，选择性差并需要在高温条件等缺点。项目提出将MOFs材料引入到纳米粒子体系中，通过构建纳米粒子@MOFs核壳纳米结构来防止纳米粒子的聚集，在提高其稳定性的同时调控发挥核壳型纳米粒子@MOFs其独特的二元组成协同性能，通过实验结果和理论模拟计算相结合，对将所涉及的纳米粒子@MOFs核壳纳米结构气体传感器和纳米效应机理建立气敏模型和关键技术问题进行探讨研究，实现传感器的结构设计、研制和性能测试。本项目不仅能够为高性能气敏纳米材料的设计与合成提供理论依据并为气敏器件的研制提供新思路，而且项目涉及纳米技术、微电子学、分析化学等具有多学科理论和多前沿技术加叉，具有重要的研究意义。

核壳结构纳米粒子@金属有机骨架材料组装体在气敏传感器领域具有重要的应用价值。本项目主要围绕“核壳结构纳米粒子@金属有机骨架材料组装体”和“气体传感器的性能及机理研究”开展系统的研究，成功的开发了具有超高灵敏度和高选择性的氨气和甲醇气体传感器。本项目相关研究成果构建的核壳结构纳米结构不仅可以防止纳米粒子的聚集，而且在提高其稳定性的同时调控发挥核壳型的二元组成协同性能。同时通过调控核壳结构纳米粒子组装基元的形貌和尺寸实现了对核壳结构纳米粒子组装体功能的调控。并通过实验结果和理论模拟计算相结合，揭示了其组装机理。本项目着重探索了可控合成的核壳结构纳米粒子和杂化材料在传感器，器件和能源等领域的应用价值。.项目已发表SCI收录论文6篇(以第一作者身份在AM、ACS Nano、Small上发表系列论文4篇)，其中JCR I区4篇，II区2篇，Journal TOP 5篇，影响因子总和为78.114，超过21的2篇，超过6.0的5篇，超额完成原定计划(发表SCI论文3-5篇)。.