Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Preparation of Nickel(II)–Hydroxide–(Sodium Fluoride Tetrasilicic Mica) Intercalation Complexes and Formation of Ultra Fine Nickel Particles by H2 Reduction
Kunio OhtsukaMitsuru SudaMikiya OnoMinoru TakahashiMinoru SatoShunji Ishio
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1987 Volume 60 Issue 3 Pages 871-876

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Abstract

Nickel(II)–hydroxide–(sodium fluoride tetrasilicic mica) intercalation complexes were prepared by titrating nickel(II) nitrate solutions in the presence of mica with sodium hydroxide. As the degree of interlayering increased, the I(002)⁄I(001) intensity ratio increased and the specific surface areas decreased. The composition of fully developed nickel(II) hydroxide interlayer, to be exact, hydroxonickel(II) complex was [Ni3(OH)5(H2O)]+ per formula unit. Nickel(II) hydroxide within the interlayers of the silicate was reduced at about 500 °C in H2 flow and then 5–10 nm ultra fine nickel particles were distributed over the whole surface of mica. With an increase of reducing temperature, the amount of reduced nickel increased and sintering of nickel particles on the surface of mica proceeded.

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