Photocatalytic degradation of triphenylmethanes in vis/TiO2 suspension system
改性TiO2光催化降解三苯甲烷类污染物

Fe3+-doped TiO2 crystal powders were prepared by hydrothermal method with titanium sulfate as raw materials. The samples were characterized using XRD. Photocatalysed degradation of triphenylmethanes (bromophenol blue,methyl green,methyl blue,malachite green,methyl violet and basic fuchsin) in vis/TiO2 suspension system was studied. The experiment results show that the as-prepared TiO2 crystals are anatase. The reaction of photocatalysed degradation obeys pseudo first-order kinetics and is represented by the Langmuir-Hinshelwood (L-H) kinetic model. The observed rate constants (k) are in this order: bromophenol blue