滑弧放电合成纳米晶TiO2光催化剂及其等离子体特性研究

项目名称： 滑弧放电合成纳米晶TiO2光催化剂及其等离子体特性研究

项目编号： No.11475041

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 朱爱民

作者单位： 大连理工大学

项目金额： 110万元

中文摘要： 滑弧放电作为一种新型的大气压等离子体发生技术，其放电特征是由起始的准热阶段快速转变为非热阶段，具有高的电子密度和较低的气体温度。滑弧放电等离子体（暖等离子体），兼具热等离子体和冷等离子体的优点，应用前景广阔。本项目拟开展滑弧放电合成纳米晶TiO2光催化剂及其等离子体特性的研究，考察高压电源、电极与反应器结构以及工艺条件对滑弧放电等离子体合成TiO2光催化剂的影响规律；通过电学测量、时间分辨成像、时间分辨的发射光谱诊断以及稳定物种的在线分析，阐明滑弧放电等离子体特性与合成TiO2光催化剂的反应机理；开创一种快速、高效合成纳米晶TiO2光催化剂的滑弧放电等离子体新技术；探索滑弧放电等离子体一步合成N、C掺杂的TiOx可见光催化剂。

中文关键词： 滑弧放电；TiO2；光催化剂；大气压等离子体；等离子体诊断

英文摘要： Gliding arc discharge, being a novel technique for generating atmospheric-pressure plasma, is characterized by a fast transition from an initial quasi-thermal stage to a non-thermal stage, possessing high electron density and relatively low gas temperature. Gliding arc plasma (warm plasma) combines the advantages of both thermal and cold plasmas, which makes it look more and more promising for many applications. In this project, gliding arc synthesis of nanocrystal TiO2 photocatalysts and its plasma characteristics are to be studied. The effects of high-voltage power source, configuration of electrodes and reactor and processing conditions will be investigated. Using electrical measurement, temporally resolved imaging, temporally resolved optical emission spectroscopic diagnostics and online analysis of stable species, the characteristics of gliding arc plasma and the reaction mechanism of TiO2 synthesis will be clarified. A novel gliding arc plasma technology for fast and efficient synthesis of nanocrystal TiO2 photocatalysts will be developed. One-step synthesis of visible-light active N-, C-doped TiOx photocatalysts by gliding arc plasma will be explored.

英文关键词： Gliding arc discharge;TiO2 photocatalyst;Atmospheric-pressure plasma;plasma diagnostics