含铁柱撑膨润土光催化降解Orange Ⅱ  

Photocatalytic degradation of Orange Ⅱ by Fe-containing pillared bentonites

作　　者：李益民[1] 温丽华[2] 刘颖[2] 李海洋 

机构地区：[1]绍兴文理学院化学系,浙江绍兴312000 [2]中国科学院安徽光学精密机械研究所环境光谱学实验室,安徽合肥230031

出　　处：《功能材料》2005年第6期874-876,880,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20073042);浙江省自然科学基金资助项目(202018)

摘　　要：制备了两种含铁柱撑膨润土(FeAlBent和FeBent),用XRD、BET、TEM对它们进行了性能表征。以偶氮染料OrangeⅡ为目标降解物,考察了它们作为复相Fenton催化剂的光催化性能,以及溶液的pH、H2O2浓度、催化剂用量对OrangeⅡ降解的影响,并与相应的均相Fenton反应进行了比较。结果表明FeAlBent和FeBent具有很高的比表面积(分别为194.2和114.6m2/g),用FeAlBent或FeBent作光催化剂的复相光助Fenton反应的催化性能明显优于相应的均相光助Fenton反应。此外复合铁铝柱撑膨润土(FeAlBent)比单一的铁柱撑膨润土(FeBent)在反应过程中具有更低的铁离子溶出量,它们还具有分离简单、重复使用性好等特点。Both Fe pillared bentonite (Fe-Bent) and Al-Fe pillared bentonite (Fe-Al-Bent) were prepared, and used as catalysts for the degradation of azo dye Orange Ⅱ under UV irradiation. The catalysts were characterized by XRD, BET and TEM. The effects of pH valve and the H_2O_2 concentration of the photocalytic reaction solution, as well as the amount of catalyst on the photocatalytic degradation efficiency were investigated. It was found the Fe-Al-Bent and the Fe-ent have high BET surface area (194.2m2/g and 114.6m2/g, respectively). Both the heterogeneous photo-Fenton processes employing the Fe-Al-Bent or the Fe-Bent as catalyst exhibit higher photo-catalytic activity compared to their corresponding homogeneous photo-Fenton process. The Fe ions amount in solution leaching from the Fe-Al-Bent was lower than that leaching from the Fe-Bent during reaction process. In addition, the Fe-Al-Bent can be easily recovered, regenerated and reused.

关 键 词：光催化降解 铝铁柱撑膨润土 光助Fenton OrangeⅡ 

分 类 号：O643[理学—物理化学]