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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 sensitized TiO2 composites were prepared by in-situ chemical polymerization. The composites were characterized by FTIR, diffuse reflectance and fluorescence emission spectroscopy. The photocatalytic properties of the composites were studied by photocatalytic degradation of phenol aqueous solution under sunlight. The effects of molar ratio of pyrrole to TiO2 on the photocatalytic activity of the composites were investigated. The results show that there is a strong interaction between polypyrrole and TiO2 in the composite. Polypyrrole sensitization broadens the photo-responsive range of TiO2 and promotes the separation of photo-generated carriers, so that the composites have higher Catalytic activity. The photocatalytic activity of the composite under solar light is better than that of TiO2. When the molar ratio of pyrrole to TiO2 is 0.02, the composite has the best catalytic activity and can be reused many times.