Preparation and Characterization of α-Ni(OH)2/SiO2 Submicrosphere and α-Ni(OH)2 Hollow Submicrosphere

doi:10.3724/SP.J.1077.2009.00345

Abstract

Abstract: The nearly monodisperse SiO₂ submicrospheres with uniform size (270nm) were prepared by the hydrolysis of TEOS. Then the SiO₂ submicrospheres were coated with α-Ni(OH)₂ nanoflakes by a new solution growth method. The Ni(OH)₂ nanoflakes were synthesized by a solution process using hydrofluoric acid solution as nickel ion ligand to form nickel-fluoro complex, NH₃ aqueous solution as OH^- supplier and also supplemental nickel ion ligand. The coating thickness is increased with coating times. It is only 35nm for coating once. After coating three times, the coating thickness is increased to about 100nm. The α-Ni(OH)₂ hollow submicrospheres are obtained after subsequent removal of the core particles by NaOH solution(20wt％) at 40℃ for 24h. BET calculation shows that the surface area of the Ni(OH)₂ hollow spheres is 141.06m²/g.

Key words: α-nickel hydroxide, silica, core/shell, hollow structure

CLC Number:

TM912

LOU Zai-Liang,LI Qun-Yan,WANG Zhi-Hong,WEI Qi,NIE Zuo-Ren. Preparation and Characterization of α-Ni(OH)₂/SiO₂ Submicrosphere
and α-Ni(OH)₂ Hollow Submicrosphere[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00345.

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Preparation and Characterization of α-Ni(OH)₂/SiO₂ Submicrosphere
and α-Ni(OH)₂ Hollow Submicrosphere

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