不同貴金屬修飾的氧化鋅復合物性能研究.pdf

1、華東師范大學碩士學位論文不同貴金屬修飾的氧化鋅復合物性能研究姓名：常勇剛申請學位級別：碩士專業(yè)：物理化學指導教師：徐承天20100501華東師范大學碩上學位論文ABSTRACTOneofthemainproblemsofthesemiconductorphotooxidationishowtoenhancethephotocatalyticactivitythequantumyieldandthephotocatalyticreacti

2、onrateofthesemiconductorOriginallyoneefficientwaywastodepositthenoblemetalssuchasAg，Au，Pt，andPdonthesurfaceofthesemiconductorwhichcouldseparatetheelectronsandholesInthispaperthenoblemetal(Au，Ag，Pt，Pd)modifiedZnOwereprepa

3、redthroughafacileonepothydroandalcoholthermalmethodThephotocatalyticperformanceforthedegradationofrhodamineBwasevaluatedAtthesametime，therelationshipbetweentheelectronstructureandsurfacestructrueofthesampleswasalsoevalua

4、tedwiththeiropticalpropertiesOurstudymaygivesomeideasontheresearchofthesemiconductorphotocatalystandthesemiconductordeviceThefollowingaretheresultsoftheresearch：1Ag／ZnOcompositeswerepreparedbyasimplehydrothermalapproachT

5、headditionofAgN03tothereactionsystemreducestheconcentrationofvacanciesandsurfacehydroxylofZnOThephotocatalyticactivityofAg／ZnOwastestedwiththephotocatalyticdegradationofrhodamineBandtheresultsindicatedthattheinfluenceoft

6、hestructureofZnOonthephotocatalyticactivitycouldbeneglectedcomparingwiththatofdepositionofAgonthesurfaceofZnO2Pd／ZnOsampleswithvariouspalladiumcontentswerepreparedthroughthehydrothermalmethodTheresultsdemonstratethatpart

7、ialPdloadsonthesurfaceandthattherestisdopedinthelatticeofZnOItisfoundthatthemodificationofpalladiumnotonlymodulatestheelectronicstructureofZnObutalsoaffectstheamountofsurfacehydroxylTheformerdeterminestheopticalpropertie

8、sofPd／ZnO，leadingtotheshiftofabsorptionandPLpeaks，whilethelatterinfluencesthephotocatalyticactivityofthesamplesThemodificationofpalladiumattheoptimalvalue(407at％Pd／ZnO)notonlypromotestheseparationofphotogeneratedelectron

9、—holepairsbutalsoincreasestheamountofthesurfacehydroxylresultinginthepromotionofphotodegradationefficiency3M(Au，AgPt)／ZnOsampleswithvariousmetalcontentswerepreparedthroughthealcoholthermalmethodThephotocatalyticactivityo