TiO_2纳米薄膜厚度对CdS纳米柱阵列光电化学性能和稳定性的影响  

Effect of TiO_2 Nano-Film Thickness on the Photoelectrochemical Performance and Stability of CdS Nanorod Arrays

作　　者：吴梁鹏[1,2,3] 王潇漾 李娟 杨旭[1,2,3] 李新军[1,2,3] WU Liang-peng;WANG Xiao-yang;LI Juan;YANG Xu;LI Xin-jun(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640

出　　处：《新能源进展》2018年第5期359-364,共6页Advances in New and Renewable Energy

基　　金：国家自然科学基金青年基金项目(51802305);广东省自然科学基金项目(2018A030310134)

摘　　要：利用水热合成法在导电玻璃表面上原位生长CdS纳米柱阵列(CdSNRA),然后通过浸渍提拉法在其表面涂覆TiO_2纳米薄膜,制备CdSNRA@TiO_2异质结复合结构材料。利用扫描电镜、X射线衍射、紫外可见光吸收、拉曼光谱等手段对其形貌和结构进行表征。进一步考察了TiO_2薄膜厚度对CdSNRA@TiO_2复合结构光电极的光电化学性能的影响。结果表明,覆盖50 nm厚TiO_2层的CdSNRA复合结构光电极在可见光下具有更好的光电性能和稳定性,这归因于CdSNRA核和TiO_2壳之间光生电子和空穴的有效分离。CdS nanorod arrays(CdSNRA)were grown on fluorine-doped tin oxide glass substrates via a hydrothermal process,and TiO2 layers with different thicknesses were coated on CdS nanorods surface via dip-coating under mild conditions.The morphology and structure of CdSNRA@TiO2 were characterized by field-emission scanning electron microscopy,X-ray diffraction,Raman spectroscopy and ultraviolet-visible spectroscopy.Effect of TiO2 nano-film thickness on the photoelectrochemical performance and stability of CdSNRA@TiO2 was studied,results showed that the best performance was obtained with thickness of 50 nm.The improved photoactivity was ascribed to the efficient separation of photogenerated electrons and holes between CdS cores and TiO2 shells.

关 键 词：CdS纳米柱阵列 TIO2 光电化学性能 光稳定性 

分 类 号：TK511[动力工程及工程热物理—热能工程]