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以硝酸铋、钨酸钠为原料,铁为掺杂元素,采用水热法制备了掺铁Bi_2WO_6可见光催化剂。并以亚甲基蓝为模拟污染物,通过单因素实验考察了不同制备条件和光催化反应条件对亚甲基蓝降解效果的影响,评价了催化剂的可见光催化活性。结果表明:掺铁Bi_2WO_6可见光催化剂适宜的制备条件为掺铁量0.5%(物质的量分数),水热反应时间20h,pH=4.00;在光照时间120min条件下,用1.5g/L催化剂处理10mg/L亚甲基蓝溶液时,亚甲基蓝降解率高达98.9%。
Using bismuth nitrate and sodium tungstate as raw materials and iron as the doping element, an iron-doped Bi 2 WO 6 visible light catalyst was prepared by hydrothermal method. The influence of different preparation conditions and photocatalytic reaction conditions on the degradation of methylene blue was investigated by single factor experiment with methylene blue as the simulated pollutant. The visible light catalytic activity of the catalyst was evaluated. The results show that the suitable preparation conditions of Fe 2 O 5 -based visible light catalyst are 0.5% iron (mass fraction), hydrothermal reaction time 20 h, pH = 4.00; under irradiation time 120min, / L methylene blue solution, methylene blue degradation rate as high as 98.9%.