影像科学与光化学 ›› 1996, Vol. 14 ›› Issue (1): 59-64.DOI: 10.7517/j.issn.1674-0475.1996.01.59

• 研究简报 • 上一篇    下一篇

紫外光照射下ZnO超微粒子表面上的光反应

陈四海1, 任新民1, U. Nickel2   

  1. 1. 中国科学院感光化学研究所, 北京100101;
    2. Institut fur Physikalische Chemie, Universitat Erlangen-Nurnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
  • 收稿日期:1995-07-12 出版日期:1996-02-20 发布日期:1996-02-20
  • 通讯作者: 陈四海

PHOTOREACTIONS OCCURRED ON THE SURFACE OF ZnO ULTRAFINE PARTICLE UNDER UV IRRADIATION

CHEN Sihai1, REN Xinmin1, U. Nickel2   

  1. 1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China;
    2. Institut fur Physikalische Chemie, Universitat Erlangen-Nurnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
  • Received:1995-07-12 Online:1996-02-20 Published:1996-02-20

摘要: 由于半导体超微粒子具有独特的尺寸量子化效应和表面效应[1~6],它在利用太阳能光催化降解有机污染物,有机光合成及光电转化等领域中有着极其广泛的应用.目前,大量的工作集中在超微颗粒表面上有机物的光反应过程的研究[7].

关键词: 超微粒子, 氧化锌, 荧光中心, 光反应

Abstract: ZnO ultrafine particles were prepared in the presence of polyvinylpyrrolidone(PVP)and the photoreactions occurred on the surface of such particles under UV irradiation were studied through UV/Vis and fluorescence spectroscopy.In the presence of oxygen,it was found that new ZnO collloids were generated under UV irradiation when excess Zn2+ ions were adsorbed on ZnO surface whereas only dissolution of ZnO was observed when OH- was in excess,The results of fluorescence quenching experiments suggest that Zn2+ on the surface of ZnO acts as the visible fluorescence center of ZnO particles.

Key words: ultrafine particle, ZnO, fluorescence center, photoreaction