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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: De Soler-Illia, G.J.A.A.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08974756_v11_n11_p3140_DeSolerIllia
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08974756_v11_n11_p3140_DeSolerIllia
record_format dspace
spelling todo:paper_08974756_v11_n11_p3140_DeSolerIllia2023-10-03T15:43:49Z Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism De Soler-Illia, G.J.A.A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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.
format JOUR
author De Soler-Illia, G.J.A.A.
spellingShingle De Soler-Illia, G.J.A.A.
Synthesis of nickel hydroxide by homogeneous alkalinization. Precipitation mechanism
author_facet De Soler-Illia, G.J.A.A.
author_sort De Soler-Illia, G.J.A.A.
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
url http://hdl.handle.net/20.500.12110/paper_08974756_v11_n11_p3140_DeSolerIllia
work_keys_str_mv AT desolerilliagjaa synthesisofnickelhydroxidebyhomogeneousalkalinizationprecipitationmechanism
_version_ 1807316560002416640

Ejemplares similares