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Preparation of copper compounds of different compositions and particle morphologies

Published online by Cambridge University Press:  31 January 2011

Stanka Kratohvil  and
Egon Matijević
Stanka Kratohvil
Affiliation:
Department of Chemistry, Clarkson University, Potsdam, New York 13699
Egon Matijević
Affiliation:
Department of Chemistry, Clarkson University, Potsdam, New York 13699
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Abstract

Copper compounds of different chemical compositions and particle shapes were prepared by homogeneous precipitation from copper salt solutions in the presence of urea. It was demonstrated that the nature of the anions played an essential role in the properties of the generated solid phase. Thus, Cu(II)-nitrate solutions yielded spherical amorphous particles which had the composition of malachite [Cu2(OH)2CO3], the Cu(II)-chloride solutions gave bipyramidal particles of atacamite [CuCl2 · 3Cu(OH)2], and in Cu(II)-sulfate solutions needle-shaped brochantite [3Cu(OH)2 · CuSO4] or platelets of posnjakite [3Cu(OH)2 · CuSO4 · H2O] were formed. The addition of NaOH to prepared dispersions resulted in a rapid phase transformation of all above solids into needle-like Cu(OH)2. Calcination of various copper basic compounds at 700–800 °C temperature produced CuO, while the particle morphology was retained.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 4 , April 1991 , pp. 766 - 777
Copyright
Copyright © Materials Research Society 1991

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