高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1191.

• 论文 • 上一篇    下一篇

CdS/TiO2复合纳米微粒的原位合成及性质研究

郝恩才, 孙轶鹏, 杨柏, 沈家骢   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1997-07-18 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 郝恩才,男,26岁,博士研究生.
  • 作者简介:郝恩才,男,26岁,博士研究生.
  • 基金资助:

    国家自然科学基金(批准号:59773014)资助课题.

Synthesis and Properties of CdS/TiO2Coupled Semiconductor Nanoparticles

HAO En-Cai, SUN Yi-Peng, YANG Bai, SHEN Jia-Cong   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1997-07-18 Online:1998-08-24 Published:1998-08-24

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摘要： 采用一种新方法,在TiO2表面原位合成CdS纳米微粒,并用红外光谱跟踪了CdS/TiO2复合纳米微粒的形成过程.紫外吸收光谱研究表明TiO2对CdS纳米微粒的形成有很好的稳定作用,荧光光谱研究结果表明,这种纳米异质结构有着良好的电荷分离.

关键词: 复合半导体纳米微粒, 修饰, 稳定作用, 电荷分离

Abstract: A new kind of preparation method of CdS/TiO2coupled semiconductor nanoparticle in aqueous solution is described, in which CdSis in-situ formed on the surface of TiO2.Furthermore, coupling of the two semiconductor particles via the bifunctional thiols offers an opportunity to sensitize TiO2with a large bandgap and energetically low-lying conduction band by CdS with a small bandgap and an energetically high lying conduction band. IR spectra were used to follow the formation process of this coupled nanoparticles. UV-V is spectra illustrated well the stability effect of TiO2on the formation of CdS nanoparticles. The quenching of CdSemission indicated that there were an effective charge separation between dissimilar semiconductor particles.

Key words: Coupled semiconductor nanoparticles, Modification, Stabilized effect, Charge separation

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