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Synthesis of hcp-Co and mixture of hcp/fcc-Co crystals: Insight into their Congo red removal ability

Published online by Cambridge University Press:  17 April 2014

Lixia Wang ,
Lijun Zhao  and
Min Wang
Lixia Wang*
Affiliation:
Key Laboratory of Applied Chemistry, College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China
Lijun Zhao
Affiliation:
Key Laboratory of Automobile Materials, Ministry of Education and School of Materials Science and Engineering, Jilin University, Changchun 130022, China
Min Wang
Affiliation:
Key Laboratory of Applied Chemistry, College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Cobalt crystals with hcp or hcp/fcc mixed structure were prepared by a solvothermal process based on the dosages of N2H4·H2O and the effect of crystal structure on their magnetic properties and Congo red (CR) removal abilities was studied. To our best knowledge, it is the first report on CR removal by micrometer and submicrometer sizes of Co crystals with the best CR removal ability reaching 694.4 mg g−1. For the hcp and fcc mixed structure, the degree of mixing can be clearly observed from the high-resolution transmission electron microscopy images. The micrometer and submicrometer sizes of Co crystals will be good for magnetic separation after CR removal.

Keywords

adsorptioncrystallographic structuremagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 8 , 28 April 2014 , pp. 989 - 995
Copyright
Copyright © Materials Research Society 2014 

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