Potassium manganese oxide (KMn8O16) nanowires were synthesized using a customized hydrothermal method and characterized using scanning-electron microscopy, X-ray diffractometry and thermogravimetric analysis to determine the effects of reaction temperatures and molar ratio of reactants on the crystallinity and morphology of the synthesized nanowires. It was established that increasing the stoichiometric portion of potassium precursors increased the average nanowire diameter though such effect was comparatively less prominent in terms of reaction temperature. Deficient supply of potassium inhibited nanowires growth in which only KMn8O 16 (cryptomelane) growth orientations of (211), (301) and (600) were observed along with traces of MnO2, resulting in a wool-like nanowires suspension. © 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Bibliographical noteC.Y. Yin and X. Chen are supported by Murdoch University's Walter Murdoch Distinguished Collaborator Program. The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group no. RGP-VPP-303. N.M. Huang acknowledges financial support provided by the High Impact Research Grant from the Ministry of Higher Education of Malaysia (UM.S/P/HIR/MOHE/21).
- B. Electron microscopy
- B. Nanocomposites
- D. Transition metal oxides