Photodegradation of malachite green dye by Mg-doped TiO_2

The treatment of water containing malachite green using Mg-doped TiO2 photocatalyst prepared by a sol-gel method was introduced.The effect of initial concentration of MG,catalyst amount on degradation were studied.The results indicated that Mg-doping remarkably improved the photocatalytic activity of TiO2 for malachite green degradation.The degradation rate of malachite green solution(30 mg/L) reached 84% over Mg-doped TiO2(1.0 g/L) in 120 min under the irradiation of ultraviolet light,and the catalytic reaction mechanism was forecasted.