基于聚乙烯醇的共轭聚合物/二氧化钛复合光催化剂的结构及光催化性能  

Preparation and Photocatalytic Activity of Conjugated Polymer/TiO_2 Composites Based on Poly(Vinyl Alcohol)

作　　者：杨海刚[1] 宋远卿[1] 徐守斌[1] 江龙[1] 淡宜[1] 

机构地区：[1]高分子材料工程国家重点实验室(四川大学),四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2011年第7期87-89,94,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50573052)

摘　　要：通过聚乙烯醇(PVA)在酸性条件下的热消除反应制备了具有共轭结构的聚合物(C-PVA),进一步有机/无机杂化制备出C-PVA/TiO2复合光催化剂。紫外-可见吸收光谱、傅里叶变换红外光谱和热失重结果表明,C-PVA含有共轭双键和羰基;X射线光电子能谱和紫外-可见漫反射光谱分析结果表明,C-PVA/TiO2复合光催化剂表面由具有一定共轭结构的聚合物和TiO2组成,且该催化剂对光的吸收由紫外光区扩展到可见光区;光催化实验结果表明,C-PVA/TiO2复合光催化剂对模型污染物罗丹明B有较强的吸附(2.5 h达吸附平衡,吸附率为20%),在可见光下对罗丹明B的降解具有良好的催化效果(5 h降解率可达99%)。The conjugated polymer（C-PVA） was perapared from the thermal elimination of poly（vinyl alcohol）（PVA）,and also the C-PVA/TiO2 composites were prepared from C-PVA and TiO2 sol.UV-Vis,FT-IR,TG,XPS and diffuse reflection spectrum（DRS） were used to characterize the C-PVA and the C-PVA/TiO2 composites,and also the photocatalytic degradation of Rhodamine B（RhB）.The results indicate that the thermal elimination of PVA results in conjugated polymer.The photoresponse wavelength area of C-PVA/TiO2 to the light in UV-Vis region is extended to 400 nm800 nm,whereas that of TiO2 is below 400 nm.The equilibrial absorption percentage of RhB in the presence of C-PVA/TiO2 is presented at 2.5 hours and 20%.And C-PVA/TiO2 degrades 99% RhB in 5 hours under visible light.

关 键 词：聚乙烯醇 热消除 共轭聚合物 二氧化钛 光催化剂 

分 类 号：TQ426.64[化学工程]