锐钛型掺铁TiO_2可见光催化降解苯胺的研究

Study on the photocatalytic degradation of aniline by anatase iron-doped TiO_2 under visible light

为了研究掺铁TiO2对苯胺的光催化降解效果,以硫酸钛为原料采用水热法制备了锐钛型掺铁TiO2粉末,确定了它在可见光照射下对苯胺溶液的催化降解工艺条件。结果表明,在如下最佳条件下:苯胺初始质量浓度(0)为50 mg/L,溶液pH=7,掺铁0.2%(摩尔分数)的锐钛型TiO2的质量浓度为1.0 g/L,室温(17℃)下可见光照射反应1 h,苯胺的降解率达到71.46%。

In order to study the photocatalytic degradation efficiency of iron-doped TiO2 to aniline, the anatase iron-doped TiO2 powders were prepared by the hydrothermal method with titanium sulfate as raw material and the process conditions of photocatalytic degradation of aniline under visible light were determined. The results show that the degradation rate of aniline achieves 71.46% under the optimum conditions as follows： adding asrepared 0.2% （mole fraction） iron-doped anatase TiO2 （mass concentration of 1.0 g/L） into the aniline solution （190 = 50 mg/L, pH = 7） illuminated by visible light, stirring quickly at room temperature （17℃） for 1 h.