摘要
采用原位化学氧化聚合方法制备了聚吡咯敏化TiO2复合材料。通过FTIR、漫反射和荧光发射光谱等技术对复合材料进行了表征。在太阳光下,用苯酚水溶液光催化降解研究了复合材料的光催化性能,考察了吡咯与TiO2摩尔比对复合材料光催化性能的影响。结果表明,复合材料中聚吡咯和TiO2之间存在较强的相互作用力,聚吡咯的敏化拓宽了TiO2的光响应范围,促进了光生载流子的分离,从而使复合材料具有较高的催化活性。在太阳光下复合材料的光催化活性优于TiO2,当吡咯与TiO2的摩尔比为0.02时,复合材料的催化活性达到最佳,并可重复使用多次。
Polypyrrole （PPy） sensitized TiO2 composites were synthesized by in situ chemical oxidation of Py from the surfaces of the TiO2 nanoparticles. The composites were characterized by FTIR,DRS and PL. Their photocatalytic activities were investigated by degrading phenol in aqueous solution under solar light irradiation and the effect of molar ratio of Py and TiO2 to the photocatalytic activities of composites was also studied. The results showed that in composites there was a strong interaction between TiO2 and PPy. Sensitizing of PPy could extend the light response of TiO2 to whole UV-Vis region,resulting in efficient separation of photogenerated charges; hence the photocatalytie activity of composites was greatly enhanced. The photocatalytic activity of composite photocatalysts was higher than that of neat TiO2, and the optimum molar ratio occurred at 0.02. Furthermore, the as-prepared photocatalyst can be reused for several runs.
出处
《化学通报》
CAS
CSCD
北大核心
2009年第10期917-921,共5页
Chemistry
基金
河西学院西部资源环境化学重点实验室面上项目基金(XZ0706)资助
关键词
聚吡咯
TiO2
复合光催化剂
太阳光
苯酚
降解
Polypyrrole
TiO2
Composite photocatalyst
Solar light
Phenol
Degradation
