CdS纳米棒及CdS-TiO2异质结的制备与光电特性研究中期报告摘要本文介绍了CdS纳米棒及CdS-TiO2异质结的制备过程及光电特性，并对其性能进行了初步分析。通过溶液法制备CdS纳米棒，并在其表面修饰TiO2纳米颗粒，形成CdS-TiO2异质结。利用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)等测试手段对样品进行了表征，发现所制备的CdS纳米棒长度大致为80-100nm，直径为20-30nm，CdS-TiO2异质结中TiO2纳米颗粒大小约为10nm，CdS纳米棒和TiO2颗粒之间存在良好的结构匹配。利用紫外-可见吸收光谱分析了样品的光学吸收特性，并研究了不同条件下的光催化性能。结果表明，CdS-TiO2异质结在紫外光照射下具有较高的光催化活性，对罗丹明B溶液的降解率达到了85%以上，在可见光照射下的光催化性能相对较差。关键词：CdS纳米棒；TiO2纳米颗粒；异质结；光催化性能AbstractThispaperintroducesthepreparationprocessandphotoelectricpropertiesofCdSnanorodsandCdS-TiO2heterojunction,andanalyzestheirpropertiespreliminarily.CdSnanorodswerepreparedbysolutionmethod,andTiO2nanoparticlesweremodifiedontheirsurfacestoformCdS-TiO2heterojunction.ThesampleswerecharacterizedbyX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),scanningelectronmicroscopy(SEM)andothertestingmethods.ItwasfoundthatthelengthofthepreparedCdSnanorodswasabout80-100nm,withadiameterof20-30nm,andthesizeofTiO2nanoparticlesinCdS-TiO2heterojunctionwasabout10nm,andtherewasagoodstructuralmatchbetweenCdSnanorodsandTiO2particles.TheopticalabsorptioncharacteristicsofthesampleswereanalyzedbyUV-visibleabsorptionspectroscopy,andthephotocatalyticpropertiesunderdifferentconditionswerestudied.TheresultsshowedthatCdS-TiO2heterojunctionhadhighphotocatalyticactivityunderUVlightirradiation,andthedegradationrateofrhodamineBsolutionreachedmorethan85%,whilethephotocatalyticperformanceundervisiblelightirradiationwasrelativelypoor.Keywords:CdSnanorods;TiO2nanoparticles;heterojunction;photocatalyticproperties