View : 88 Download: 0

Single-step synthesis, characterization, and application of nanostructured KxMn1-y,COy,O2-δ with controllable chemical compositions and crystal structures

Title
Single-step synthesis, characterization, and application of nanostructured KxMn1-y,COy,O2-δ with controllable chemical compositions and crystal structures
Authors
Lee S.H.Kim T.W.Park D.H.Choy J.-H.Hwang S.-J.Jiang N.Park S.-E.Lee Y.-H.
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2007
Journal Title
Chemistry of Materials
ISSN
0897-4756JCR Link
Citation
vol. 19, no. 20, pp. 5010 - 5017
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Cobalt-substituted manganese oxide one-dimensional (ID) nanowires have been synthesized through one-pot hydrothermal treatment of the ion pair solution of Co2+ and MnO4 -, along with their three-dimensional (3D) hierarchically assembled microspheres. The stabilization of cobalt ion in the manganese sites of α- and α-MnO2 structures was clearly evidenced by Mn K-edge and Co K-edge X-ray absorption spectroscopy as well as by powder X-ray diffraction and elemental analyses. The chemical composition, crystal structure, and morphology of the resultant nanostructures can be easily tailored through the control of reaction condition and precursor composition. That is, ID nanowires with the tunnel-type α-MnO2 structure can be prepared by the reaction at 140 °C, whereas the lowering of reaction temperature or the increase of Co content gives rise to the synthesis of 3D hierarchical nanostructured microspheres with the layered α-MnO2 structure. It has been obviously demonstrated that the partial Co substitution for the nanostructured manganese oxides causes the improvement of their catalytic activity with respect to olefin oxidation as well as affects significantly their electrode performances. The present study provides an effective way of controlling the chemical properties and functionalities of nanostructured manganese oxides through cation substitution. © 2007 American Chemical Society.
DOI
10.1021/cm070633d
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE