化学学报 ›› 2003, Vol. 61 ›› Issue (11): 1824-1827. 上一篇    下一篇

研究论文

硫化镉准纳米圆球的人工活性膜法控制合成及其性能研究

吴庆生;刘金库;丁亚平;刘茜   

  1. 同济大学化学系;上海大学化学系;中国科学院上海硅酸盐研究所
  • 发布日期:2003-11-15

Controlled Synthesis and Properties of CdS Quasi-nanospheres with Artificial Active Membrane as Template

Wu Qingsheng;Liu Jinku;Ding Yaping;Liu Qian   

  1. Department of Chemistry, Tongji University;Department of Chemistry, Shanghai University;Shanghai Institute of Ceramics, Chinese Academy of Sciences, State Key Laboratory of Performance Ceramics and Superfine Microstructure
  • Published:2003-11-15

首次利用胶棉人工活性膜板,在0.1mol/L CdCl_2溶液和0.1mol/L Na_2S溶液 组成的隔膜组装体系中,成功制备了硫化镉准纳米圆球。产物粒径范围80~280nm ,平均粒径~170nm,圆球边界清晰,为立方闪锌矿多晶结构,晶格常数a=0. 5818nm。光学性质研究表明,当激发波长为390nm时,出现了波长为480nm的蓝光和 535nm的绿光两个发射峰;紫外-可见光谱在475nm处有最大吸收,与常规材料相比 “蓝移”了40nm,表现出明显的量子尺寸效应。另外还对产物合成机理进行了探讨 。

关键词: 硫化镉, 闪锌矿, 晶体结构, 紫外分光光度法, 尺寸效应, 光学性质

Quasi-nanospheres of CdS were successfully synthesized with artificial active membrane of collodion as template. The results indicated that regular CdS quasi-nanospheres, which had a cubic zinc- blende structure with a cell constant a = 0.5818 nm, could be formed with 0.1 mol/L CdCl2 and 0.1 mol/L Na2S as reactants at room temperature. The sphere diameter range was from 80 to 280 nm, and the average diameter was about 170 nm. When the exciting wavelength was 390 nm, two emission peaks at 480 nm with blue light and at 535 nm with green light appeared. The UV-vis spectrum showed a wider absoiption peak at 475 nm, and had 40 nm blue-shift compared with bulky materials, indicating that the particles had obvious quantum size effect. In addition, the reaction mechanism has primarily been explored.

Key words: ZINC SULFIDE, BLENDE, CRYSTAL STRUCTURE, UV, SCALE EFFECT, OPTICAL PROPERTIES

中图分类号: