物理化学学报 >> 1999, Vol. 15 >> Issue (10): 925-929.doi: 10.3866/PKU.WHXB19991012

研究论文 上一篇    下一篇

复合纳米粒子SnO2/CdS的制备及性能研究

徐斌, 程虎民, 王艳芹, 马季铭   

  1. 北京大学化学系,北京 100871
  • 收稿日期:1998-12-23 修回日期:1999-04-20 发布日期:1999-10-15
  • 通讯作者: 程虎民

Preparation and Properties of Nanosized Composite Particle SnO2/CdS

Xu Bin, Cheng Hu-Min, Wang Yan-Qin, Ma Ji-Ming   

  1. Department of Chemistry,Peking University,Beijing 100871
  • Received:1998-12-23 Revised:1999-04-20 Published:1999-10-15
  • Contact: Cheng Hu-Min

摘要:

由湿化学方法制备了包覆型SnO2 /CdS复合纳米粒子 .用ICP、XRD及TEM测定了样品的组成和平均晶粒尺寸 ,并通过HRTEM直接观察到样品的包覆结构 .与纯SnO2 纳米粒子相比较 ,SnO2 /CdS复合纳米粒子在波长为 360 - 580nm范围内有更强的吸收 ;由该复合纳米粒子制得的电极呈现出良好的光电转换特性 ,其最大IPCE值达 40 .9% ,远大于纯SnO2 纳米电极的IPCE( 0 .65 % ) ,而且光响应范围也从纯SnO2 的 300 - 400nm拓展到 300 - 550nm .

关键词: SnO2-CdS, 复合纳米粒子, 光电转换

Abstract:

 A new coated type of SnO 2/CdS nanosized composite particles was prepared by wet chemical method. The composition, structure and size of the product were determined by XRD, ICP, TEM and HRTEM. Compared with pure SnO 2 particle, it has stronger absorption in the range of longer wavelength (360~580nm) and shows good photo electrochemical character. The maximum value of IPCE was 40.9%, much greater than that of pure SnO2 electrode, 0.65%. The range photoelectric response has been broadened from 300~400nm to 300~550nm.

Key words: SnO2-CdS, Composite nanoparticle, Photoelectric conversion