基于银-半导体鸟笼状纳米结构对太阳光降解工业染料废水的催化性能研究

项目名称： 基于银-半导体鸟笼状纳米结构对太阳光降解工业染料废水的催化性能研究

项目编号： No.61308095

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 翟宏菊

作者单位： 吉林师范大学

项目金额： 29万元

中文摘要： TiO2与ZnO半导体被认为是理想的光降解工业废水的催化剂，但由于其量子产率低，光谱响应范围窄等关键问题没有解决严重地限制了其应用与发展。本项目将小尺寸的金属银纳米颗粒与半导体复合形成新型鸟笼状结构及核壳结构Ag@TiO2和Ag@ZnO，由于利用催化活性的在可见光区有吸收的Ag纳米颗粒作为电子传递介质，同时发挥TiO2和ZnO纳米壳的稳定性能、小尺寸效应、紫外光响应等优点，使纳米Ag核与TiO2和ZnO半导体外壳之间发生协同作用，实现电子空穴对分离，从而提高量子产率，拓宽光响应范围使其极大红移，制备出一系列稳定性高、可控的Ag@TiO2、Ag@ZnO新型复合结构，实现其催化太阳光降解工业废水中有机污染物；研究外壳材料类型、尺寸、形貌等因素对光催化性能的影响，筛选出活性最强的催化剂；探索催化机理，揭示构效关系，对光催化反应动力学进行研究，为设计此类催化剂奠定理论及实验基础。

中文关键词： 太阳光降解；染料废水；催化性质；纳米材料；核壳结构

英文摘要： ZnO and TiO2 semiconductors are considered to be an ideal material for the degradation of industry waste water, however, some key scientific problems are not resolved, such as the existence of low quantum yield,and narrow photo resonance, which limited seriously the application and development of ZnO and TiO2. This project will carry out the research work of designing and preparing the core-shell and novel cage structure of Ag@TiO2,Ag@ZnO,combining nanosized Ag particles has surface plasmon resonance and being served as an electron transfer relay. At the same time, the merits of stable nanosized effect and the UV light resonance of TiO2 and ZnO can be elaborated. So the quantum yield will be improved and the light resonance will be broadened to red-shift. Thus, the degradation of industry waste water of silver-semiconductor cage structure under solar light will be realized. We will investigate the effects to photocatalysis,such as the type, size and morphology of the shell to screen the most active catalyst and study the dymatic of catalysis reaction. The catalysis mechanism will be explored, the relationship between the structure and catalysis activity will be discovered as well as the theory and experience foundation for this kind of catalysts will be laid.

英文关键词： degradation under sunlight；dye waste water；catalysis properties；nanomaterials；core-shell structure