作　　者： ; ; ; ;

机构地区： 广西师范大学环境与资源学院环境工程与保护评价重点实验室

出　　处： 《安全与环境学报》 2012年第1期37-39,共3页

摘　　要： 为提高金红石型TiO2的可见光吸收性能和光催化活性,以FeC2O4为Fe源,用浸渍法制备了掺铁金红石TiO2光催化剂。采用XRD、UV-Vis等手段对催化剂进行表征;以阿特拉津为目标污染物,在Vis/H2O2条件下对其催化活性进行了评估。结果表明,Fe以Fe2O3的形式负载在金红石型TiO2的表面;掺铁后金红石型TiO2显著拓宽了其可见光的吸收范围;煅烧温度为400℃时制得的光催化剂Fe-R-400℃的粒径结构和光催化活性最好。以Fe质量分数为1%的Fe-R-400℃作为光催化剂,控制反应体系的初始pH=3,催化剂投加质量浓度为1 g/L,H2O2初始浓度为1 mmol/L,经可见光照射反应15 min后,对初始质量浓度为10 mg/L的阿特拉津的去除率可达95.7%。催化剂循环试验表明,Fe在金红石TiO2表面负载比较牢固,催化剂具有较好的稳定性和重复使用性能。 The present paper is aimed to study ways of how to prepare Fe-doped rutile TiO2 and the evaluation approaches to the visible light photocatalytic properties so as to expand its light absorption range and improve the absorption efficiency through enhancing their photocatalytic activities at the visible region. For this purpose,we have adopted FeC2O4 as Fe source to make Fe-doped rutile TiO2 through soakage.While preparing and testing the catalyst Fe-doped rutile TiO2,we have analyzed and characterized it by means of a few analytical tools,such as XRD and UV-Vis.Under the condition of Vis/H2O2,atrazine has been chosen as the object to be contaminated to evaluate the photocatalytic activities.The results of our experimentation indicate that Fe,which was loaded on the surface of rutile TiO2,was mainly at presence in the form of Fe2O3 while the light absorption range of rutile TiO2 at the visible region was significantly expanded after it was doped by Fe.The catalyst,Fe-R-400 ℃,calcined at 400 ℃ tends to assume its best particle size of structure and display its highest photocatalytic activity.The experimental results of the photocatalytic reaction also reveal that the atrazine-removing rate can be made to reach 95.7% if the reaction were let to go on under the condition of Fe-R-400 ℃ with 1% of Fe mass fraction used as the photocatalyst,the initial reaction pH=3,the reaction dosage of the photocatalyst—1 g/L,while the initial concentration of H2O2 was 1 mmol/L,and the initial mass concentration of atrazine was 10 mg/L.The recycling experimental results of the photocatalyst also indicate that Fe was firmly loaded on the surface of rutile TiO2 and the photocatalyst enjoys a favorable and stable recycling behavior.

关 键 词： 环境科学技术基础学科 掺 金红石 光催化 阿特拉津

领　　域： [化学工程]