有机染料在TiO_2上的吸附及对光催化降解的影响

Adsorption of Organic Dyes on TiO_2 and Its Effect on Photocatalytic Degradation

在一系列酸度条件下分别研究了甲酚红、亚甲基蓝两种染料在纳米二氧化钛上的吸附和光催化降解规律 ,发现甲酚红的光催化降解效率随着吸附量的增大而增强 ,而亚甲基蓝的光催化降解效率在短时间内随着吸附量的增大而减弱 ,长时间后又随着吸附量的增大而增强 .文中同时分析了吸附对光催化效率影响的机理 .

Adsorption and photocatalytic degradation of two dyes:cresol red and methyl blue, were studi_ ed under a series pH condition in this paper to study relationship between adsorption and photocatalytic degradation. The results of this study suggested that photocatalytic degradation effeciency of cresol red increased with adsorption increasing; and for methyl blue, photocatalytic degradation effeciency decreased with adsorption increasing at first few minutes, but total photocatalytic degradation effeciency increased with adsorption increasing afterwards. The mechanism of adsorption's effect on photocatalytic degradation effeciency was also discussed.