(SrTiO3)1-x(SrTaO2N)x固溶体的制备及光催化性能研究.pdf

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1、第26卷第1期无机化学学报Vo1．26No．12010年1月CHINESEJOURNAIOFINORGANICCHEMISTRY149—152(SrTiO3)_x(SrTaO2N)固溶体的制备及光催化性能研究李瑞璞罗文俊李朝升-I三于涛1,3邹志刚-l_，f南京大学物理系环境材料与再生能源研究中心，南京210093)r南京大学材料系，南京210093)南京大学固体微结构国家重点实验室，南京210093)摘要：通过高温固相反应合成了N掺杂的SrTiO3(SrTiO，)(SrTaON)固溶体，对其进行了X射线衍射，紫外可见吸收光谱，X射线光电子能谱分析和比表面积的表征。随由0增大至

2、0．4，固溶体带隙变窄，由3．2eV降至2．3eV，吸收光谱由紫外光区扩展到r见兜区。存甲醇溶h~(5omLCH30H+220mLH10)l11进行了光催化分解水产生氧气的反应，在硝酸银溶液(27OmI，0．01moI．1J，)巾进行了光催化分解水产生氧气的反应．在可见~(A>420nm)照射下，实现了呵见)匕响应的光催化分解水。关键词：相法；固溶体；可见比；分解水中图分类号：0643．3文献标识码：A文章编号：1001—4861(2010)01—0149—04PreparationandPhotocatalyticCharacterizationof(SrTiO3),_~(S

3、rTaO~N)xSolidSolutionLIRui-Pu’LUOWen—JunLIZhao—Sheng1’’!。YUTao，ZOUZhi—Gang-’f~2．omaterials棚Reneu，ableEner~"ResearchCenter(ERERC),DepartmentofPhysics，NcmjingUniversity,Nanjing21009)(2Dept~rtmentofMaterialsScienceairdEngineering,NanjingUniversity,Ncmjing210093}lNationalLabormoryofSolidStateMie

4、rostrtulllres，~MmjingUniversit)',Nanjing2100931Abstract：N—dopedSrTiO3and(SrTiO3)1(SrTaO2N)werepreparedbyathermalammonolysismethod．ThesampleswerecharacterizedbyXRD，UV—Visspectroscopy，XPSspectroscopyandlowtemperaturenitrogenadsorption-desorption．Theunitcelledgelengthof(SrTiO3)l(SrTaO~N)increas

5、eslinearlyandthebandgapsreducefrom3．2to2．14eVasxincreasesfrom0to0．40．Thephotoeatalyticactivitiesofthesampleswereinvestigatedinanaqueoussuspensionsystem．Aqueousmethanolsolution(50mLCH3OH+220mLH2O)forH2evolutionandaqueoussilvernitratesolution(270mL，0．0lmol·L)forO2evolutionwereusedassacrificial

6、reagents．Thesamplesshowphotocatalyticactivitiesundervisiblelight(A>420nm)irradiation．Keywords：solidstatemethod；solidsolution：visiblelight：watersplittingWatersplittingusingaheterogeneousphotoca—oxidesandworkonlyintheultravioletregionI．UVtalystisallattractivesolutiontosupplycleanandlightenergy

7、accountsforonlyabout4％ofthetotalrecyelablehydrogenenergy．Manyphotoeatalystsenergyofthesunlightontheearth，whilevisiblelightsuitableforwatersplitting，forexampleSrTiO3(bandmakesupabout43％．Atpresent，thereisalackofgap3．2eV)，havebeendeveloped，however，mos