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Synthesis and catalysis properties of NiO flower-like spheres and nanosheets: Water-induced phase transformation of nickel hydroxides

Published online by Cambridge University Press:  16 November 2011

Xin Liang ,
Junjia Xiao ,
Ye Gou  and
Biaohua Chen
Xin Liang
Affiliation:
The State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; and Faculty of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Junjia Xiao
Affiliation:
Faculty of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
Ye Gou
Affiliation:
Faculty of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
Biaohua Chen*
Affiliation:
Faculty of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

An oleylamine-assisted solvothermal approach has been developed for the synthesis of nickel hydroxide nanomaterials. α-Ni(OH)2 flower-like spheres and β-Ni(OH)2 hexagonal sheets were obtained by tuning the water volume in the synthesis system. The water-induced phase and morphology evolution from α-Ni(OH)2 spheres to β-Ni(OH)2 sheets were investigated in detail by controlled experiments based on their crystal structures. Moreover, NiO spheres and sheets were obtained by direct thermal decomposition of corresponding nickel hydroxides. N2 adsorption/desorption, temperature-programmed reduction with H2, and catalytic activity tests reveal that NiO spheres exhibit higher surface area, larger pore volume, higher reducibility, and better catalysis activities for CO oxidation than NiO sheets.

Keywords

WaterCrystallineCatalytic
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 24 , 28 December 2011 , pp. 3091 - 3097
Copyright
Copyright © Materials Research Society 2011

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