物理化学学报 >> 1998, Vol. 14 >> Issue (10): 877-880.doi: 10.3866/PKU.WHXB19981004

研究论文 上一篇    下一篇

铜(II)-铬(VI)复合均匀胶体粒子的制备

郭明林, 张玉亭   

  1. 天津纺织工学院 材料科学系，天津 300160
  • 收稿日期:1997-12-15 修回日期:1998-03-10 发布日期:1998-10-15
  • 通讯作者: 张玉亭

Preparation of Uniform Particles of Copper(II) and Chromium(VI) Compounds

Guo Ming-Lin, Zhang Yu-Ting   

  1. Department of Material Science,Tianjin Institute of Textile Science and Technology,Tianjin 300160
  • Received:1997-12-15 Revised:1998-03-10 Published:1998-10-15
  • Contact: Zhang Yu-Ting

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摘要：

报导在尿素存在下通过均相沉淀法由硝酸铜和重铬酸铵制备复合均匀胶体粒子的结果．研究了一些实验参数对其组成、形态和粒子大小的影响．确定了胶体粒子的制备条件．结果观测到，由硝酸铜和重铬酸铵溶液形成了球形的多刺的粒子，它的组成为水合铬酸铜．

关键词: 铜(II)-铬(VI)化合物, 粒子形貌, 球形多剌粒子

Abstract:

Uniform particles of copper(Ⅱ) a11d chromium (Ⅵ) compounds were prepared by homogeneous precipitation from copper nitrate and ammonium dichromate solutions in the presence of urea. The effects of various experimental parameters on the composition, morphology, and size of the resulting particles were studied. The concentrations of metal salts varied over the raug2.0×10-4-3.2×10-3 mol•dm-3, with ratio [Cu(NO3)2]/[(NH4)2Cr2O7] = 2, and with the urea concentration 0.1-1.25 mol•dm-3. The aging was carried out at 78℃ over a period up to several hours. Thus, copper nitrate and ammonium dichromate solutions yielded spherical thorny particles which had the composition of hydrated copper chromate. Calcination of the particles at 400 ℃ produced CuCrO4, the particle morphology of which was retained.

Key words: Copper(II) and chromium(VI) compounds, Particle morphology, Spherical thorny particles