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ID:52341462
大小:1.39 MB
页数:8页
时间:2020-03-26
《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
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