Preparation And Photocatalytic Properties Of The Modified Nano-titanium Dioxide

In this paper, a new type of photo-catalyst Mo-doped TiO₂ was synthesized by sol-gel method. The study showed the crystal was mainly formed as anatase phase and the particle size was about 19.3nm. Mo was doped into TiO₂ mainly as Mo⁶⁺, at the same time the visible-light responding bound was extended by Mo⁶⁺ doping , in addition when the metal dopant content was 3.0% and the calcinations temperature was 400℃, the visible-light responding bound was about 450nm, the removement of methylene blue was about 56.6% under visible light.TiO₂ catalyst supported on granular activated carbon was made using sol-gel method and sintering method, at the same time the porous and fine- dispersed Mo-TiO₂/AC could be abtained using polyethylene glycol (PEG) as modification. The result showed the crystal formed very well and the particle size was about 4.4nm. The dopant content of TiO₂ on actived carbon increased along with loading time, on the contrary the BET of MO-TiO₂/AC decreased along with loading time. The study also showed the catalyst loaded firmly and the repeated usage function was good.Photocatalytic degration of 1-Naphthol-5-sulfonic acid in water was first studied using Mo-TiO₂/AC as photo-catalyst.This paper studied the influence of pH, solution initial concentration and lamp-house to the treatment effects, at the same time the paper also studied the decompose process of l-Naphthol-5-sulfonic acid. These studies will provide a new treatment of l-Naphthol-5-sulfonic acid waste water for our country.