高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (7): 997.

• 论文 •    下一篇

SnO2-SnS2复合纳米粒子的制备及光电性质研究

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:1998-09-28 出版日期:1999-07-24 发布日期:1999-07-24
  • 通讯作者: 程虎民
  • 作者简介:徐斌,女,23岁,硕士研究生.
  • 基金资助:

    国家自然科学基金(批准号:29673003)资助课题

Preparation and Photoelectric Properties of Nanosized Composite Particle SnO2-SnS2

XU Bin, CHENG Hu-Min, WANG Yan-Qin, MA Ji-Ming   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1998-09-28 Online:1999-07-24 Published:1999-07-24

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摘要： 采用离子交换法制备了SnO2-SnS2复合纳米粒子.用XRD、TEM和X-EDAS测定了样品的组成、结构、形貌和尺寸,结果表明,样品为SnS2部分包覆SnO2的球形复合纳米粒子,其平均粒径为5nm.研究了该复合纳米粒子的紫外-可见漫反射光谱和光电化学性质,观察到SnO2-SnS2复合纳米粒子的光吸收比SnO2的明显向长波区扩展;制成工作电极后的光电流值和光电转换效率(IPCE)都比相应的纯组分纳米粒子电极显著提高.

关键词: SnO2－SnS2, 复合纳米粒子, 光电转换

Abstract: A new SnO2-SnS2nanosized composite particle was prepared by ion exchanging re-action. The composition, structure and size of this material were determined by XRD, TEM and X-EDAS. It′s shown that in the sample the nanosized particle SnO2was partly coated by SnS2Its average particle size was ca . 5 nm. The properties of UV-V is diffusive reflection spectrum and photoelectric chemistry were investigated. It was observed that the absorbance range of SnO2-SnS2nanosized composite particle was broadened to longer wavelength area. After being prepared to be a working electrode, its value of photocurrent and IPCEwere both highly improved, compared with pure SnO2and SnS2electrode.

Key words: SnO2-SnS2, Composite nanoparticle, Photoelectric conversion.

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