二氧化钛可见光催化降解甲基紫的影响因素

Factors of affecting photocatalytic degradation on methyl violet by titania

对自制锐钛矿型掺铁二氧化钛粉末进行SEM表征,研究了用光催化降解甲基紫的影响因素。结果表明,所制备的粉末由二氧化钛晶体自组装而成,晶体呈八面体结构,每个面为三角形。可见光照射下,用产物二氧化钛催化降解甲基紫溶液的优化条件是:4 mg/L的甲基紫溶液中加入0.180 0 g掺铁2%(摩尔分数)二氧化钛粉末,室温下恒温反应2 h,降解率为59.36%。

The as-prepared Fe3＋-doped anatase TiO2 powders were characterized by means of SEM,and the degeneration of methyl violet photocatalyzed by Fe3＋-doped anatase TiO2 was studied.Experiment results show that the product powders are made of TiO2 nanocrystals,individual TiO2 nanocrystals is shown in octahedron and have flat triangle planes.The best degeneration rate of methyl violet is 59.36% under follow optimum conditions：adding 0.180 0 g as-prepared 2% Fe3＋-doped（molar ratio） A-TiO2 powders into the 4 mg/L methyl violet solution,stirring quickly at room temperature for 4 h.