Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism

Uniform microcrystalline nickel(II) hydroxide particles have been prepared via the homogeneous alkalinization of nickel(II) nitrate solutions by urea hydrolysis. The nature of the precipitated solids depends on the temperature of synthesis. At ca. 423 K, i.e., under the hydrothermal conditions attai...

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Autor principal: Soler Illia, Galo Juan de Avila Arturo
Publicado: 1999
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v11_n11_p3140_DeSolerIllia
http://hdl.handle.net/20.500.12110/paper_08974756_v11_n11_p3140_DeSolerIllia
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08974756_v11_n11_p3140_DeSolerIllia
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spelling paper:paper_08974756_v11_n11_p3140_DeSolerIllia2023-06-08T15:49:15Z Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism Soler Illia, Galo Juan de Avila Arturo Uniform microcrystalline nickel(II) hydroxide particles have been prepared via the homogeneous alkalinization of nickel(II) nitrate solutions by urea hydrolysis. The nature of the precipitated solids depends on the temperature of synthesis. At ca. 423 K, i.e., under the hydrothermal conditions attained by microwave heating, β-Ni(OH)2 forms upon the fast ripening of α-Ni(OH)2. In the range 363-343 K, α-Ni(OH)2 is always the final product. The evolution of the systems during the precipitation of α-Ni(OH)2 is analyzed in terms of the kinetic factors that control nucleation and growth. A precipitation mechanism, based on the principle of minimal structural change, is proposed; it is suggested that the edge-on condensation of Ni4(OH)44+ tetramers is a key step in the sequence of events that conduct from hexaaquo Ni2+ to α-Ni(OH)2. © 1999 American Chemical Society a Universidad de Buenos Aires b Unidad de Actividad Química. Fil:De Soler-Illia, G.J.A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v11_n11_p3140_DeSolerIllia http://hdl.handle.net/20.500.12110/paper_08974756_v11_n11_p3140_DeSolerIllia
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Uniform microcrystalline nickel(II) hydroxide particles have been prepared via the homogeneous alkalinization of nickel(II) nitrate solutions by urea hydrolysis. The nature of the precipitated solids depends on the temperature of synthesis. At ca. 423 K, i.e., under the hydrothermal conditions attained by microwave heating, β-Ni(OH)2 forms upon the fast ripening of α-Ni(OH)2. In the range 363-343 K, α-Ni(OH)2 is always the final product. The evolution of the systems during the precipitation of α-Ni(OH)2 is analyzed in terms of the kinetic factors that control nucleation and growth. A precipitation mechanism, based on the principle of minimal structural change, is proposed; it is suggested that the edge-on condensation of Ni4(OH)44+ tetramers is a key step in the sequence of events that conduct from hexaaquo Ni2+ to α-Ni(OH)2. © 1999 American Chemical Society a Universidad de Buenos Aires b Unidad de Actividad Química.
author Soler Illia, Galo Juan de Avila Arturo
spellingShingle Soler Illia, Galo Juan de Avila Arturo
Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
author_facet Soler Illia, Galo Juan de Avila Arturo
author_sort Soler Illia, Galo Juan de Avila Arturo
title Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
title_short Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
title_full Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
title_fullStr Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
title_full_unstemmed Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
title_sort synthesis of nickel hydroxide by homogeneous alkalinization. precipitation mechanism
publishDate 1999
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v11_n11_p3140_DeSolerIllia
http://hdl.handle.net/20.500.12110/paper_08974756_v11_n11_p3140_DeSolerIllia
work_keys_str_mv AT solerilliagalojuandeavilaarturo synthesisofnickelhydroxidebyhomogeneousalkalinizationprecipitationmechanism
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