物理化学学报 >> 2002, Vol. 18 >> Issue (11): 1005-1008.doi: 10.3866/PKU.WHXB20021109

研究论文 上一篇    下一篇

Y(OH)CO3在AgI上的覆盖及中空粒子的制备

于洺;张玉亭   

  1. 天津工业大学材料化工学院,天津 300160
  • 收稿日期:2002-03-07 修回日期:2002-05-27 发布日期:2002-11-15
  • 通讯作者: 张玉亭 E-mail:yutingzh@public.tpt.tj.cn

Covering of Y(OH)CO3 on AgI and Preparation of Hollow Particles of Y(OH)CO3

Yu Ming;Zhang Yu-Ting   

  1. College of Material and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160
  • Received:2002-03-07 Revised:2002-05-27 Published:2002-11-15
  • Contact: Zhang Yu-Ting E-mail:yutingzh@public.tpt.tj.cn

摘要: 用银配合物制备均匀球形AgI纳米粒子,粒径20~100 nm范围内可自由调控.用AgI作为内置核,在尿素存在下,将Y(NO3)3进行升温水解,在预置粒子上包覆Y(OH)CO3形成复合粒子,并符合表面膜机理.结合X射线、电镜照片,考察了Y(NO3)3、尿素、银配合物、内置核的浓度,反应时间,水解温度,表面电荷对反应体系的影响.并加入配合剂Na2S2O3,运用生成稳定配合物的方法溶解内置核,最终得到Y(OH)CO3中空粒子.

关键词: 内置核, 覆盖, 独立成核, 表面电荷, 中空粒子, 配合物

Abstract: The spherical nano-particles of AgI were prepared from Ag complexes. Diameter of AgI could be controlled to within 20 to 100 nm. The prerequisite of covering of Y(OH)CO3,obtained by the hydrolysis of Y(NO3)3 in the presence of urea, on the pre-existing spherical AgI particles was that the surface of pre-existing particles must be charged negatively. The results were effected by some factors, such as concentration of Ag complexes, Y(NO3)3,urea and pre-existing particles, reaction time, aging temperature, as evidenced by X-ray diffraction, TEM of particle experiments. The hollow particles of Y(OH)CO3 (see Fig.5) were prepared by the coordination reaction which dissolved the pre-existing particles of AgI in Na2S2O3 concentrated solutions.

Key words: Pre-existing particles, Covering, Independent nucleations, Surface charge, Hollow-particles, Complexes