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Mesoporous assembly of 2D manganate nanosheets intercalated with cobalt ions

Title
Mesoporous assembly of 2D manganate nanosheets intercalated with cobalt ions
Authors
Kim T.W.Jung T.S.Hyun S.-H.Hwang S.-J.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2010
Journal Title
Materials Letters
ISSN
0167-577XJCR Link
Citation
vol. 64, no. 5, pp. 565 - 568
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Mesoporous compound of cobalt-layered manganese oxide was synthesized by self-assembly reaction between 2D manganate nanosheets and cobalt ions. It was found that 2D manganate nanosheets are interstratified with cobalt ions, leading to the formation of porous intercalation heterostructure with expanded surface area of ∼ 44-100 m 2/g. The mesopores with the average diameters of ∼ 11-17 nm originate from the house-of-cards type stacking of the layered manganate crystallites. Co K- and Mn K-edge X-ray absorption spectroscopy revealed that both the cobalt and manganese ions are stabilized in octahedral symmetry with the mixed oxidation states of Mn 3+/Mn 4+ and Co 2+/Co 3+. Considering high oxidation states of component metal ions, this porous material is expected to be very useful as redox catalysts and/or lithium intercalation electrodes. © 2009 Elsevier B.V. All rights reserved.
DOI
10.1016/j.matlet.2009.11.071
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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