物理化学学报 >> 2003, Vol. 19 >> Issue (01): 21-24.doi: 10.3866/PKU.WHXB20030106

研究论文 上一篇    下一篇

CdS/TiO2复合纳米粒子的光学性质

王斌;高飞;何斌;张冬柏;程虎民;马季铭;齐利民   

  1. 北京大学化学与分子工程学院,北京 100871
  • 收稿日期:2002-03-22 修回日期:2002-06-25 发布日期:2003-01-15
  • 通讯作者: 程虎民 E-mail:hmcheng@chem.pku.edu.cn

Optic Property of CdS/TiO2 Composite Nanoparticle Prepared in the Reversed Microemulsion

Wang Bin;Gao Fei;He Bin;Zhang Dong-Bai;Cheng Hu-Min;Ma Ji-Ming;Qi Li-Min   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
  • Received:2002-03-22 Revised:2002-06-25 Published:2003-01-15
  • Contact: Cheng Hu-Min E-mail:hmcheng@chem.pku.edu.cn

摘要: 在Brij35/正己醇/环己烷/水构成的反相微乳体系中,分别合成了CdS、TiO2纳米粒子和TiO2包覆CdS(CdS/TiO2)的复合纳米粒子.测定了它们的紫外-可见吸收和荧光光谱.结果表明, CdS/TiO2复合纳米粒子在可见光区的吸收比相应的两组分的吸收之和更强.纳米CdS和纳米TiO2均有较强的荧光.而且在相同浓度时纳米TiO2的荧光比纳米CdS的荧光更强.但在CdS/TiO2复合纳米粒子中,TiO2的荧光被淬灭,而CdS的荧光稍有降低.

关键词: 反相微乳, CdS, TiO2, 荧光, 复合纳米粒子

Abstract: Nanoparticles of CdS, TiO2 and CdS coated with TiO2 (CdS/TiO2) are prepared respectively in reversed microemulsion which is made up of Brij35/n-hexanol/cyclohexane/water. The absorption of CdS/TiO2 composite nanoparticle in the range of visible light is stronger than the sum of CdS and TiO2. Both of the particles of CdS and TiO2 show the obvious fluorescence spectrum, which of TiO2 is much stronger than that of CdS when they are in the same concentration. However, the fluorescence of TiO2 is quenched and that of CdS decreases slightly in the CdS/TiO2 composite nanoparticle.

Key words: Reversed microemulsion, CdS, TiO2, Fluorescence, Composite nanoparticle