CdS/TiO_2球棒结构异质结的合成及其光电化学性能研究  

Fabrication of CdS/TiO_2 ball-and-stick structure heterojunction and its photoelectrochemical properties

作　　者：刘健[1] 申倩倩[1] 贾虎生[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《电子元件与材料》2014年第6期1-5,共5页Electronic Components And Materials

基　　金：教育部长江学者与创新团队发展项目资助(No.IRT0972);国家自然科学基金资助项目(No.51152001);科技部国际科技合作与交流专项基金资助项目(No.2011DFA52290;No.2012DFR50460);山西省回国留学人员科研资助项目(No.2012-038)

摘　　要：利用循环伏安电沉积法将CdS纳米颗粒沉积在TiO2纳米棒阵列上制备了CdS/TiO2复合薄膜,采用XRD、SEM和UV-Vis分光光度计对样品的晶体结构、微观形貌和光学性质进行了表征,并研究了紫外光预处理TiO2对复合薄膜的结构和光电化学性能的影响。结果表明,制备的TiO2薄膜为沿c轴择优取向的金红石单晶,CdS成功电沉积到TiO2纳米棒的顶部形成了CdS/TiO2球棒结构异质结,所制复合薄膜的光吸收边均扩展到了可见光区域。特别是对TiO2纳米棒阵列进行紫外线照射预处理后,复合薄膜中CdS的含量显著提高,其表现出更好的光电化学性能。CdS/TiO2 composite films were prepared with electrodeposition of CdS nanoparticles upon the TiO2 nanorod arrays by cyclic voltammetric method. The structures, morphologies and optical properties of the prepared films were characterized by XRD, SEM and UV-Vis spectrometer, and the effects of UV-pretreatment of TiO2 on structure and photoelectrochemical properties of the composite films were studied. The results show that all of the obtained TiO2 films are monocrystalline with a rutile structure and grow along c axis. CdS particles are successfully electrodeposited on the top of the TiO2 nanorods, forming a CdS/TiO2 ball-and-stick structure heterojunction. The optical absorption edges of the prepared composite films are extended to the visible light range. Especially, after pretreatment ofTiO2 nanorod arrays using UV irradiation, the content of CdS in the composite films increases greatly, and the composite films exhibite better photoelectrochemical properties.

关 键 词：TiO2纳米棒 CDS 电沉积 球棒结构 紫外线预处理 光致亲水性 

分 类 号：TB321[一般工业技术—材料科学与工程]