ZnTPP/TiO_2纳米复合催化剂的合成及其光催化活性的测定

Synthesis and photocatalytic activity of ZnTPP/TiO_2 nano-composite catalyst

TiO2是一种环保型多相半导体光催化剂,对一些毒性大、生物难降解的有机污染物,用TiO2光催化剂催化生成的强氧化剂,在常温、常压下可以彻底地将有机物氧化为H2 O、CO2等小分子。目前,TiO2主要用于中低浓度废水处理、小空间空气净化、材料表面自清洁、重金属回收、固体废物处理等领域。与传统除污工艺相比,具有无毒、安全、稳定性好、催化活性高、见效快、能耗低、

ZnTHPP/TiO2 nano-composite was prepared by impregnating ZnTHPP in TiO2 network by sol-gel method through Ti（OC4 H9） 4hydrolyzing（ZnTHPP = Tetra（p-hydroxylpheny1） Porphyrin zinc）.The samples were characterized by XRD,TEM,UV-Vis.The photo-catalytic activity of ZnTHPP/TiO2 composite was investigated by the photocatalytic degradation of methyl red test.The results show that the ZnTHPP increases the visible light absorbable range of TiO2 significantly.A ZnTHPP/TiO2 composite has better photocatalytic activity than TiO2 under visible light irradiation,and can degrade the methyl red effectively.The catalyst has the best photocatalytic activity when the content of ZnTHPP is 1%.