【摘要】 用水热法制备了掺Fe³⁺改性TiO₂粉末,通过XRD对其结构进行了表征,并研究了在紫外光照下该掺Fe³⁺改性TiO₂对番红花红T的催化降解效果。结果表明:TiO₂晶体属于纯锐钛矿型（A-TiO₂）;优化降解条件为:番红花红T溶液初始浓度15 mg/L,pH=5,5%掺Fe³⁺量的A-TiO₂用量4 g/L,16℃下经254 nm照射反应55 min,该条件下番红花红T降解率59.5%;相同优化条件下进行暗吸附,30 min达到吸附平衡,A-TiO₂对番红花红T平衡吸附量2.02 mg/g。番红花红T降解率与吸附率基本正相关。更多还原

【Abstract】 After the Fe³⁺ doped TiO₂ powder was prepared by hydrothermal method, its structure was characterized by XRD and the photo-catalytic degradation of the safranin T by the modified TiO₂ under ultraviolet light was studied. The results show that the crystal of the prepared TiO₂ is of pure anatase（A-TiO₂）. The degradation rate of the safranin T reached 59.5% under the following optimized degradation conditions, including an initial concentration of safranin T at 15 mg/L, pH of 5, 5% Fe³⁺ doped A-TiO₂ at an amount of 4 g/L, radiation for 55 min at uv-light（254 nm） at 16 ℃. The adsorption without light was performed under the same optimized conditions, showing an adsorption equilibrium being reached within 30 min. The equilibrium adsorption capacity of A-TiO₂ for safranin T was 2.02 mg/g. It is shown that the degradation rate of safranin T is almost positively correlated with the adsorption rate.更多还原