影像科学与光化学 ›› 1995, Vol. 13 ›› Issue (3): 227-233.DOI: 10.7517/j.issn.1674-0475.1995.03.227

• 研究论文 • 上一篇    下一篇

在纳米CdS颗粒表面MV2+光还原的ESR研究

杨建军1, 冯良波2, 张治军1, 金振声2   

  1. 1. 河南大学化学系, 开封475001;
    2. 中国科学院兰州化学物理研究所, 兰州 730000
  • 收稿日期:1994-11-11 修回日期:1995-05-06 出版日期:1995-08-20 发布日期:1995-08-20
  • 通讯作者: 金振声

ESR STUDY OF MV2+ PHOTOREDUCTION ON THE SURFACE OF NANOMETER-SIZED CdS

YANG JIAN-JUN1, FENG LIANG-BO2, ZHANG ZHI-JUN1, JIN ZHEN-SHENG2   

  1. 1. Department of Chemistry, Henan University, Kaifeng 475001, P. R. China;
    2. LanZhou Institute of Chemical Physics, Lanzhou 730000, P. R. China
  • Received:1994-11-11 Revised:1995-05-06 Online:1995-08-20 Published:1995-08-20

摘要: 以甲基紫精(MV2+)作电子受体进行了纳米CdS光生电荷转移的ESR研究。实验表明,纳米CdS悬浮在1.1×10-smol/LMV2+的乙醇溶液中,光照时,MV2+的光还原速率恒定;还原产物MV二聚的速率服从二级反应动力学公式。乙醇溶液中的溶解氧和纳米CdS表面的离子及附氧对MV2+的还原过程有抑制作用。

关键词: 硫化镉, 甲基紫精, 光还原, ESR

Abstract: The photoreduction of MV2+ on the surface of nanometer-sized CdS was investigatedby means of ESR. Under illumination of the nanometer-sized CdS dispersion in 1.1×10-3mol/L MV2+ ethanol solution the photoreduction rate of MV2+ on CdS surface keeps constant and the dimerization rate of the photoreduction product MVobeys the law of secondorder reaction.The results obtained also show that the dissolved O2- in ethanol solution or the ionosorbed oxygen on CdS surface has inhibiting action on the photo reduction of MV2+.

Key words: cadmium sulfide, methylviologen, photoreduction, ESR Author to whom(Guest Professor of Henan University)correspondence should be addressed.