紫外光照射下ZnO超微粒子表面上的光反应  

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

作　　者：陈四海[1] 任新民[1] 

机构地区：[1]中国科学院感光化学研究所

出　　处：《感光科学与光化学》1996年第1期59-64,共6页Photographic Science and Photochemistry

摘　　要：紫外光照射下ＺｎＯ超微粒子表面上的光反应陈四海，任新民（中国科学院感光化学研究所，北京１００１０１）Ｕ．Ｎｉｃｋｅｌ（ＩｎｓｔｉｔｕｔｆｕｒＰｈｙｓｉｋａｌｉｓｃｈｅＣｈｅｍｉｅ，ＵｎｉｖｅｒｉｓｉｔａｔＥｒｌａｎｇｅｎ－Ｎｕｒｎｂｅｒｇ，Ｅｇｅｒｌ...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 Zn￣(2+) 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 Zn￣(2+)on the surface of ZnO acts as the visible fluorescence center of ZnO particles.

关 键 词：超微粒子 氧化锌 荧光中心 光反应 紫外线 

分 类 号：O627.27[理学—有机化学]