铜(Ⅱ)-铬(Ⅵ)复合均匀胶体粒子的制备  

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

作　　者：郭明林[1] 张玉亭[1] 

机构地区：[1]天津纺织工学院材料科学系,天津300160

出　　处：《物理化学学报》1998年第10期877-880,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

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，它的组成为水含铅酸铜．Uniform particles of copper(Ⅱ) a11d chromium (Ⅵ) compounds were prepared by homogeneous precipitation from copper nitrate and ammonium dichromate solutions in the presenceof urea. The effects of various experimental parameters on the composition, morphlology, and sizeof 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 ureaconcentration 0.1-1.25 mol.dm-3. The aging was carried out at 78℃ over a period up to severalhours. Thus, copper nitrate and ammonium dichromate solutions yielded spherical thorny particleswhich had the composition of hydrated copper chromate. Calcination of the particles at 400 ℃produced CuCrO4, the particle morphology of which was retained

关 键 词：球形多刺粒子 水合铬酸铜 脱氢 催化剂 胶体 

分 类 号：TQ426.82[化学工程] O643.38[理学—物理化学]