铁柱撑膨润土及染料橙二的光催化降解  

Fe pillared bentonite and photo-catalytic degradation of dye-Orange Ⅱ

作　　者：刘颖[1] 李益民 温丽华[1] 李海洋 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光谱学实验室

出　　处：《功能材料》2005年第1期136-138,141,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课题(202018)

摘　　要：通过铁盐与膨润土浆液反应制备铁柱撑膨润土(Fe- Bent)催化剂,结合 X射线衍射(XRD)、比表面孔隙分析(BET)和高分辨扫描电镜(TEM)对催化剂晶相、比表面积和粒度进行表征。表征结果证实其具有很高的比表面积,铁以高催化活性的α- Fe2O3 存在于复相催化剂中。以橙二为目标污染物,考察了不同类型的催化剂、催化剂用量以及 H2O2 浓度对其降解的影响,并与均相Fenton反应进行了比较。结果表明:使用铁柱撑催化剂,复相的 Fenton 反应对橙二的降解性能高于均相Fenton反应,且其具有良好的重复使用性。The Fe pillared bentonite was prepared through a reaction between a solution of iron salt and a dispersion bentonite clay. XRD, BET and TEM are used to study its microstructure, surface areas and average particle size. Characteristic results reveal that it has large surface areas and mainly consists of high catalytic activity α-Fe_2O_3. The photo-catalytic activity of the photocatalyst ware examined in the photo-assisted degradation of an organic azo-dye Orange Ⅱ. The effects on photo-assisted degradation to Orange Ⅱ of different types of catalysts, their amounts and the H_2O_2 concentrations are also investigated. We draw a comparison between the heterogeneous photo-Fenton progress and homogeneous photo-Fenton process. The researches find that Orange Ⅱ degradating speed of heterogeneous photo-Fenton process is much faster than that of homogeneous photo-Fenton process. In addition, our experiments also illustrate that Fe-Bent can be easily recovered, regenerated and reused.

关 键 词：柱撑膨润土 复相光催化反应 光催化降解 橙二 

分 类 号：O643[理学—物理化学]