Ce掺杂羟基铁插层蒙脱石的光催化性能研究  

Photocatalytic Activity of Ce Doped Hydroxyl Iron Intercalated Montmorillonite

作　　者：吴平霄[1] 李海玲[1] 

机构地区：[1]华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006

出　　处：《矿物学报》2012年第4期461-467,共7页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号:41073058;40973075);广东省科技计划项目(No.2006B36601004;2008B30302036);广东省自然科学基金项目(No.06025666;9351064101000001);高等学校博士学科点专项科研基金(No.20100172110028)

摘　　要：使用离子交换的方式制备了掺杂Ce的羟基铁插层蒙脱石,通过X射线粉末衍射分析(XRD)、红外光谱(FTIR)、X射线电子能谱(XPS)以及BET比表面积分析等测试手段对催化剂进行了表征。在不同实验条件下,使用插层蒙脱石作为异相光助Fenton试剂,考查了催化剂在紫外光条件下降解活性艳蓝的光催化性能。实验结果表明,掺杂Ce能明显提高羟基铁插层蒙脱石的光催化效率。在活性艳蓝(KN-R)初始质量浓度ρ0(KN-R)=75mg/L,pH=3.0,H2O2初始浓度[H2O2]0=4.9mmol/L条件下,t=100min时,掺杂2%Ce的铁插层蒙脱石对活性艳蓝的降解率为99.5%。实验结果结合化学结构的分析表征探讨了Ce对催化效果的影响。Ce doped hydroxyl iron intercalated montmorillonite was synthesized with ion exchange method, and it＇s catalyst chrematistics were analyzed by using powder X-ray diffraction （XRD）, Fourier transform infrared （FTIR） spectra, X-ray photoelectron spectroscopy analysis （XPS）, and BET surface analysis techniques. The photo Fenton catalytic activity of the catalyst was tested under different reaction condition using reactive brilliant blue （KN-R） as model pollutant under UV light. The result indicates that Ce doing is able to enhance the photocatalytic activity of hydroxyl iron intercalated montmorillonite. Under reaction conditon with KN-R initial concentraton of 75 mg/L, pH=3.0, and [1-120210=4.9 mmol/L, 99.5% of KN-R can be degradated at t=-100 min. The improvement of photocatalyctic performance by Ce doing was also exploited by the experiment and analysis results.

关 键 词：羟基铁 铈 光催化 插层蒙脱石 光助Fenton 

分 类 号：P578.967[天文地球—矿物学] P579[天文地球—地质学]