ZnAl_2O_4复合光催化剂制备及活性.pdf

《ZnAl_2O_4复合光催化剂制备及活性.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第28卷第9期无机化学学报Vo1．28No．92012年9月CHINESEJOURNALOFINORGANICCHEMISTRY1827．1834高比表面空心球状ZnO／ZnAI204复合光催化剂制备及活性张丽阎建辉，l，，周民杰2’。杨亚辉刘又年，(中南大学化学化工学院，长沙410083)(湖南理工学院化学化工学院，岳阳414006)(。湖南理工学院精细石油化工催化与分离湖南省重点实验室，岳阳414006)摘要：以葡萄糖为模板，聚乙二醇fPEG一4000)为分散剂通过一步水热法所得前驱体，经500oC焙烧4h得到ZnO／ZnA120产物。并用XRD、SEM、TEM、BET、TG／DTA和

2、UV—VisDRS等技术对样品进行表征。结果表明产物为空心球状ZnO／ZnA1，O复合光催化剂，比表面积高达158．3m2·g-t。在模拟太阳光照射下，以甲基橙溶液的光催化降解考察样品的光催化活性，研究了焙烧温度、pH值和PEG加入量对样品光催化活性的影响。结果表明，当pH=9，PEG加入量为1O％(以反应理论得到的前驱体ZnO／ZnA1O的质量来衡量)时，光催化活性最佳，光照60min后，0．5g·L一光催化剂用量对甲基橙的脱色率达98．7％，与TiODegussaP一25进行比较．相同条件下对甲基橙的脱色率提高了7．7％关键词：ZnO／ZnA1204；水热法；比表面；光催化中图分类号：

3、O614．24文献标识码：A文章编号：101-4861(2012)09—1827—08PreparationandPhotocatalyticPropertyofHollowSphere-LikeZnO／ZnAI204CompositePhotocatalystswithHighSpecificSurfaceAreaZHANGLi,23YANJian．Hui，ZHOUMin．JiezYANGYa—HuiLIUYouNian，(CollegeofChem~tryandChemicalEngineering,CentralSouthUniversity,Changsha410083，China

4、)(ZSchoolofChem~tryandChemicalEngineering,HunanInstituteofScienceandTechnology,Yueyang,Hunan414000,China)3HunanProvinceKeyLaboratoryofCatalysisandSeparationofseecialityPetrochemicals，HunanInstituteofScienceandTechnology,Yueyang,Hunan414006,China)Abstract：ZnO／ZnA1204compositephotocatlystswereprepar

5、edviaone—pothydrothermalprocessbyusingglucoseastemplateandpolyethyleneglycol(PEG一4000)asdispersionagentaftercalcinationat500oCfor4h．Theas—preparedsampleswerecharacterizedbyXRD，SEM，TEM，BET，TG／DTandUV-VisDRS．TheresultsindicatedthatthepreparedZnO／ZnAI204compositephotocatalystshowedhollowmicrospheress

6、hapewithhighspecificsurfacearea．Thephotocatalyticactivitiesoftheas．obtainedsampleswereevaluatedbythedegradationofMethylOrange(MO)inaqueoussolutionundersimulatedsunlightirradiation．Theeffectsofcalcinationtemperature，pHvalueandamountofPEGonthephotocatalyticdegradationeficiencyofMOwereinvestigated．Th

7、eresultsshowedthatthehighestphotocatalyticdegradationeficiencywasobservedatlOwt．％massratioofPEGtoZnO／ZnAI204andpHvalueof9inthestartingmaterials．ThemaximumphotocatalyticdecolorationrateofMOwas98．7％within60minat0．5