掺Fe3+A-TiO2紫外光下催化降解乙基紫

Photocatalytic Degradation of Ethyl Violet by Anatase Fe3+-doped TiO2 under UV-light

以掺Fe^3+A-TiO2粉末为催化剂对乙基紫溶液进行光催化降解,并确定降解的最佳条件,同时开展了暗吸附研究。结果表明,乙基紫溶液的起始质量浓度为10mg/L(溶液自身pH=6),加入2g/L掺Fe^3+5%(摩尔比)的A-TiO2粉末,在室温下(20℃)经254nm的紫外光照射,恒温快速搅拌反应1.5h,乙基紫降解率为33.70%。同上条件下撤去光源进行暗吸附试验,2h达到吸附平衡,催化剂对乙基紫吸附量为1.472mg/g。

The photocatalytic degradation of ethyl violet by as-prepared Fe ^3+-doping anatase TiO 2 (i.e.A-TiO 2 )under uv-light was studied,the optimum conditions of degradation were determined,and the dark adsorption was also studied.Experiment results showed that the degeneration rate of ethyl violet is 33.70% under follow optimizing conditions:ethyl violet initial concentration 10 mg/L,Fe ^3+-doped A-TiO 2 dosage 2 g/L,Fe ^3+-doped amount 5%(molar ratio),constant reaction temperature 20 ℃ and illumination time 1.5 h under UV-light (λ=254 nm).At the same condition,the dark adsorption equilibrium is reached for 2 h when removing the illuminant,and the adsorption capacity is 1.472 mg/g.