Fe_2O_3可见光光催化降解水中腐殖酸的研究

采用均相沉淀法制备了Fe2O3光催化剂,并用XRD对其晶型进行了表征。研究了Fe2O3催化剂在可见光照射下对水中腐殖酸的降解行为,考察了催化剂用量、初始pH值、腐殖酸初始浓度等因素对光催化氧化过程的影响。结果表明,当Fe2O3用量为0.4 g/L,腐殖酸溶液的初始浓度为10 mg/L,pH为3.0,20 W黄色荧光灯(Em ax=548 nm)照射下反应150 m in,腐殖酸的降解率达到94.1%,说明所制备的Fe2O3光催化剂在可见光照射下对水中腐殖酸有较好的降解效果,并可多次重复使用。

Study on the photocatalytic oxidation of humic acid in the water by ferric oxide under visible-light

The Fe2O3 photocatalyst was prepared by homogeneous precipitation method,and its crystal frame was characterized by XRD.The preliminary photocatalytic degradation conductions of humic acid(HA) in the water under visible light were studied.The influence on the photocatalytic processes by many factors such as different amount of photocatalyst,initial pH value,the initial concentration of humic acid and so on were also investigated.The results showed that after 150 min visible light irradiation the photocatalytic degradation rate of humic acid reaches 94.1% when the Fe2O3 amount is 0.4 g/L,the initial concentration of HA is 10 mg/L and initial pH value of solution is 3.0.This indicates that the prepared Fe2O3 photocatalyst under visible light irradiation has good effect on the degradation of HA.