Tb掺杂介孔TiO_2/聚噻吩复合材料的制备及其可见光光催化性能研究  

Preparation and visible light photocatalytic properties of polythiophene sensitized Tb doped mesoporous TiO_2 composites

作　　者：吕盟盟[1] 何琴琴[1] 陈琪[1] 费霞[1] 武其亮[1] 刘雪霆[1] 

机构地区：[1]合肥工业大学化学工程学院可控化学与材料化工安徽省重点实验室,安徽合肥230009

出　　处：《应用化工》2013年第7期1180-1184,共5页Applied Chemical Industry

基　　金：国家自然科学基金(20876030);教育部留学回国人员科研启动基金;安徽高校省级自然科学研究重点项目(KJ2010A271)

摘　　要：采用原位聚合法制备了一系列不同质量比m(Th)/m(Tb掺杂介孔TiO2)的复合光催化剂(其中Th为噻吩),采用XRD、FTIR、荧光光谱(PL)、场发射透射电镜(FETEM)和X射线光电子能谱(XPS)对复合光催化剂进行了表征。结果表明,复合粒子上的聚噻吩骨架中S原子与TiO2粒子间存在相互作用。以罗丹明B为模型降解物,研究了不同比例复合光催化剂在可见光下的光催化性能,其中m(Th)/m(Tb掺杂介孔TiO2)=1/10复合光催化剂光催化性能最好。在可见光照射下4 h,脱色率达到82.4%。这是由于Tb掺杂介孔TiO2与PTh(聚噻吩)之间的协同作用,拓宽了TiO2纳米粒子的光响应范围,提高了光生电子和空穴的分离效率,从而有效提高了其光催化性能。Polythiophene（PTh） sensitized TiO2（PTh/TiO2） composites with different mass ratio of m（Th）/m（TiO2） were synthesized by the in situ chemical oxidation polymerization.The as-prepared samples were characterized by XRD,FTIR,PL,FETEM and XPS techniques.The results indicated that a strong interaction exists between the S sites of the polymer backbone and the TiO2 particles.The photocatalytic activities of the PTh/TiO2 composite particles were examined through the degradation process of Rhodamine B（RhB） in aqueous solution under visible light irradiation.The highest activity was obtained when m（Th）/m（TiO2）=1/10.Where the degradation rate of RhB is 82.4% under visible light after 4 h.In comparison to parent materials,these composites exhibit better photocatalytic activity due to the synergistic effects produced by PTh/TiO2 composites induced efficient separation of electron-hole pairs and the extended light response range.

关 键 词：聚噻吩 Tb掺杂介孔TiO2 可见光催化 罗丹明B 

分 类 号：TQ139.2[化学工程—无机化工]