掺(氟)A-TiO_(2)制备及其光催化反应动力学研究

Preparation and Photo-catalytic Reaction Kinetics of F-doped TiO_(2)

通过水热法制备了氟掺杂A-TiO_(2)粉末,以甲基橙溶液为污染物,探讨甲基橙的初始浓度C_0、掺氟A-TiO_(2)用量m、掺氟量χ(摩尔分数)等因素在可见光照下对甲基橙催化降解反应的动力学影响。结果表明:在最佳条件(60 W白炽灯照射、C_(0 )=0.02 g/L、pH=6、m=0.3 g/L,χ=5%、21℃、t=40 min)下,光催化降解甲基橙的过程为动力学一级反应。

F-doped A-TiO_(2) powders were prepared by a hydrothermal method. Methyl orange solution was used as the contaminated liquid to investigate the kinetic effects of the initial concentration of methyl orange, C0, the amount of fluorine-doped A-TiO2, m, and the amount of fluorine doping, χ(mole fraction), on the catalytic degradation reaction of methyl orange under visible light. Experimental results show that under the optimal conditions(methyl orange's initial concentration C_0=0.02 g/L, pH=6, m=0.3 g/L, χ =5%, 60 W incandescent lamp irradiation, reaction time t =40 min at 21 ℃), the photo-catalytic degradation of methyl orange is the first-order kinetics reaction.