Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides

Copperd(II)-containing nickel(II) hydroxide particles, i.e., α-Ni1-xCux(OH)2 (0 < x ≤ 0.4), have been prepared by aging 0.5 mol dm-3 urea, Ni(NO3)2, and Cu(NO3)2 solutions at 363 K. After 3 h, coprecipitation is almost complete. The formed solids, characterized by powder X-ray diffraction, sc...

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Autores principales: Jobbagy, Matias, Soler Illia, Galo Juan de Avila Arturo
Publicado: 1998
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v10_n6_p1632_Jobbagy
http://hdl.handle.net/20.500.12110/paper_08974756_v10_n6_p1632_Jobbagy
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_08974756_v10_n6_p1632_Jobbagy2023-06-08T15:49:15Z Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides Jobbagy, Matias Soler Illia, Galo Juan de Avila Arturo Copperd(II)-containing nickel(II) hydroxide particles, i.e., α-Ni1-xCux(OH)2 (0 < x ≤ 0.4), have been prepared by aging 0.5 mol dm-3 urea, Ni(NO3)2, and Cu(NO3)2 solutions at 363 K. After 3 h, coprecipitation is almost complete. The formed solids, characterized by powder X-ray diffraction, scanning electron microscopy, energy dispersion X-ray spectroscopy, and Fourier transform infrared spectroscopy, preserve the typical characteristics of α-Ni(OH)2. Still, their chemical composition, i.e., the copper-to-nickel ratio, is nearly that of the initial solutions. The analysis of the processes that take place during the formation of α-Ni1-xCux(OH)2 indicates that, although Cu(II) and Ni(II) precipitation are separate events, the simultaneity of am-Cu(OH)2 (amorphous copper(II) hydroxide) redissolution and α-Ni(OH)2 growth provides the appropriate conditions for the intercalation of aqueous Cu(II) species within the interlayer space of the growing α-Ni(OH)2 particles. Upon mild thermal treatment, i.e., T ≥ 523 K, α-Ni1-xCux(OH)2 powders are readily converted in Ni1-xCuxO (bunsenite), provided x ≤ 0.33; when x is larger than 0.33, the thermodynamically expected segregation of tenorite is realized. The ease of Ni1-xCuxO (bunsenite) formation is rationalized in terms of the topotatic relationship between the layered structure of the precursors and the rock salt structure of the mixed oxide. Fil:Jobbágy, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Soler-Illia, G.J.D.A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v10_n6_p1632_Jobbagy http://hdl.handle.net/20.500.12110/paper_08974756_v10_n6_p1632_Jobbagy
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Copperd(II)-containing nickel(II) hydroxide particles, i.e., α-Ni1-xCux(OH)2 (0 < x ≤ 0.4), have been prepared by aging 0.5 mol dm-3 urea, Ni(NO3)2, and Cu(NO3)2 solutions at 363 K. After 3 h, coprecipitation is almost complete. The formed solids, characterized by powder X-ray diffraction, scanning electron microscopy, energy dispersion X-ray spectroscopy, and Fourier transform infrared spectroscopy, preserve the typical characteristics of α-Ni(OH)2. Still, their chemical composition, i.e., the copper-to-nickel ratio, is nearly that of the initial solutions. The analysis of the processes that take place during the formation of α-Ni1-xCux(OH)2 indicates that, although Cu(II) and Ni(II) precipitation are separate events, the simultaneity of am-Cu(OH)2 (amorphous copper(II) hydroxide) redissolution and α-Ni(OH)2 growth provides the appropriate conditions for the intercalation of aqueous Cu(II) species within the interlayer space of the growing α-Ni(OH)2 particles. Upon mild thermal treatment, i.e., T ≥ 523 K, α-Ni1-xCux(OH)2 powders are readily converted in Ni1-xCuxO (bunsenite), provided x ≤ 0.33; when x is larger than 0.33, the thermodynamically expected segregation of tenorite is realized. The ease of Ni1-xCuxO (bunsenite) formation is rationalized in terms of the topotatic relationship between the layered structure of the precursors and the rock salt structure of the mixed oxide.
author Jobbagy, Matias
Soler Illia, Galo Juan de Avila Arturo
spellingShingle Jobbagy, Matias
Soler Illia, Galo Juan de Avila Arturo
Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
author_facet Jobbagy, Matias
Soler Illia, Galo Juan de Avila Arturo
author_sort Jobbagy, Matias
title Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
title_short Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
title_full Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
title_fullStr Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
title_full_unstemmed Synthesis of Copper(II)-Containing Nickel(II) Hydroxide Particles as Precursors of Copper(II)-Substituted Nickel(II) Oxides
title_sort synthesis of copper(ii)-containing nickel(ii) hydroxide particles as precursors of copper(ii)-substituted nickel(ii) oxides
publishDate 1998
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v10_n6_p1632_Jobbagy
http://hdl.handle.net/20.500.12110/paper_08974756_v10_n6_p1632_Jobbagy
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