WxTiyO2 /SiO2气凝胶光催化剂的设计合成及其空气净化机制

项目名称： WxTiyO2 /SiO2气凝胶光催化剂的设计合成及其空气净化机制

项目编号： No.51278074

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 史非

作者单位： 大连工业大学

项目金额： 80万元

中文摘要： 本项目拟将气凝胶的高效吸附性和WO3-TiO2良好的可见光催化活性进行有效结合，设计合成一种吸附/光催化一体的WxTiyO2/SiO2复合气凝胶光催化材料。提出利用模板法和溶剂交换/表面改性相结合的新的常压干燥工艺制备高孔容疏水性WxTiyO2/SiO2复合气凝胶的构想；研究模板基溶剂交换/表面改性机理以及不同条件下WO3/TiO2纳米晶的原位析晶过程，阐明三元复合气凝胶多孔结构的形成机理、结构调控和优化机制；分析WxTiyO2/SiO2复合气凝胶微观结构（包括孔结构、晶体结构）、能带结构和光学吸收性质，研究影响W/Ti/Si三元氧化物复合气凝胶吸附/光催化能力的因素，揭示复合气凝胶对空气中典型污染气体的吸附/可见光催化协同作用机制。本项目的完成将获得多元氧化物复合气凝胶光催化剂的新的常压干燥制备方法和理论，对于多元气凝胶基光催化剂的研究和获得新型的空气净化材料具有重要意义。

中文关键词： 复合气凝胶；常压干燥；结构调控；吸附/光催化协同作用；空气净化

英文摘要： In this project, a kind of WxTiyO2/SiO2 composite aerogel photocatalyst with integrative adsorption/photocatalysis will be designed and synthesized, by effective integration of the efficient adsorption of aerogels and good visible light photocatalytic activity of WO3-TiO2. An idea of preparing hydrophobic WxTiyO2/SiO2 composite aerogels via new ambient pressure drying technology with the combination of template and solvent exchange/surface modification method is proposed. The research focuses on the template-based solvent exchange/surface modification mechanism and the formation mechanism of WO3/TiO2 nano-crystals in situ at low temperature under different conditions. The porous structure formation mechanism, microstructure regulation-control and optimization mechanism of the ternary composite aerogels will be clarified. And the microstructure (including pore, crystal structure), the energy band structure and optical absorption properties will be analyzed. Furthermore, the influencing factors on the adsorption/photocatalysis of W/Ti/Si ternary composite aerogels will be investigated, and the synergistic mechanism of adsorption/visible light photocatalysis for some typical pollutants in the air will be revealed. The accomplishment of this project will obtain new ambient pressure drying method and theory for prepa

英文关键词： composite aerogel；ambient pressure drying；structure regulation；adsorption/photocatalysis synergistic effect；air purification