SiO_2气凝胶/WO_x-TiO_2复合空气净化涂料的制备及性能  

Preparation and performance of SiO_2 aerogel/WO_x-TiO_2 composite air purification coating

作　　者：白麓楠[1] 刘敬肖[1] 史非[1] 赵婷[1] 彭岩[1] 董晓丽[1] 张秀芳[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2014年第1期53-57,共5页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金资助项目(51278074);大连市科技计划项目(2007J23JH014);大连市建设科技计划项目(201111)

摘　　要：以常压干燥制备的SiO2气凝胶和水热合成法制备的WOx-TiO2复合光催化粒子为主要的功能性无机吸附/光催化剂添加相,合成制备了SiO2气凝胶/WOx-TiO2复合空气净化涂料。通过BET-BJH法分析了SiO2气凝胶的比表面积及孔容积,利用光催化降解罗丹明B的实验分析了WOx-TiO2复合光催化粒子的可见光催化活性,重点研究了SiO2气凝胶/WOx-TiO2复合空气净化涂料对罗丹明B和甲醛气体的吸附/光催化降解能力。吸附/光催化降解罗丹明B的实验表明,吸附/光催化剂占涂料质量分数为5.0%时,具有较稳定、较高的吸附/光催化降解率,达69.6%;吸附/光催化降解甲醛的实验表明,当吸附/光催化剂占涂料质量分数的5.0%并且纯SiO2气凝胶与WOx-TiO2复合光催化粒子质量比为1∶1时,3h内复合空气净化涂料对甲醛气体的吸附/光催化降解率可达到84.62%。SiOz aerogel/WOx-TiO2 composite air purification coatings were prepared using SiO2 aerogels prepared by ambient drying and WOx-TiO2 composite photocatalyst particles prepared by hydrothermal synthesis method as the main functional inorganic adsorption/photocatalyst additives. The specific surface area and pore volume of SiO2 aerogel were analyzed by BET-BJH, and visible light photocatalytic activity of WOx-TiO2 composite photocatalyst particles was evaluated by photocatalytic degradation for Rhodamine B. Adsorption/photocatalytic degradation ability of the composite air purification coatings for Rhodamine B and formaldehyde gas were investigated. Results of adsorption/photocatalytic degradation for Rhodamine B showed the stable and higher adsorption/photocatalytic degradation rate of 69.6%when the adsorption/photocatalyst additives were 5.0% of the total amount of the coating. Results of adsorption/photocatalytic degradation for formaldehyde gas indicated that the adsorption/photocatalytic degradation rate of the composite air purification coatings for formaldehyde gas could reach 84.62% in 3 h when the adsorption/photocatalyst additives was 5.0 % of the total amount of the coating and the mass ratio of SiO2 aerogel and WOx-TiO2 composite photocatalyst particles was 1 ： 1.

关 键 词：空气净化涂料 气凝胶 WOx—TiO2 吸附 光催化降解 

分 类 号：TQ127.2[化学工程—无机化工]