铁掺杂的多孔SiO_2对罗丹明B的吸附和助催化降解研究

The Study of Adsorption and Catalytic Degradation of Rhodamine B by Iron Doped Porous SiO_2

双氧水降解水中污染物是较为常见的处理方法,但是双氧水的见光易分解影响了它的降解效率。利用溶胶-凝胶、高温煅烧法制备Fe/SiO_2催化剂,在多孔材料的表面负载提高催化剂的催化效率。通过紫外分光光度法测量罗丹明B的吸光度,从而探究不同的单一变量pH值、催化剂用量、反应温度、降解时间及H_2O_2的用量对催化降解罗丹明B的影响。研究结果表明,不同的单一变量对罗丹明B溶液降解的效果不同,根据实验结果得出处理罗丹明B的最佳条件为:最佳pH值为4、Fe/SiO_2催化剂最佳用量为0.05g、最佳反应温度为25℃、最佳反应时间为45min、H_2O_2的最佳用量为0.5mL。

H2O2 Degradation is a common treatment method, but it is easy to decompose the hydrogen peroxide and its degradation efficiency is affected. Fe/SiO2 catalysts were prepared by sol-gel, and high temperature calcination. The absorbance of rhodamine B was measured by UV spectrophotometry. The effects of different single variables, initial pH value, amount of catalyst, degradation time and reaction temperature on catalytic degradation of rho- damine B were investigated. The results showed that different single variable effect on the degradation of rhodamine B solution was different. According to the experimental results, and the best conditions for dealing with rhodamine B was optimum pH value of 4, the best dosage of Fe/SiO2 catalyst of 0. 05g, optimum reaction temperature was 25℃, optimum reaction time was 45min, the optimum dosage of H2O2 was 0.5mL.