Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 179, Issue 6, Pages 1757-1761Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2006.02.028
Keywords
alpha-MnO2; nanowires and nanorods; hydrotherinal reaction; X-ray powder diffraction (XRD); field scanning electron microscopy (FESEM); transmission electron microscope (TEM); selected area electron diffraction (SAED); high-resolution transmission electron microscope (HRTEM)
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alpha-MnO2 nanowires or nanorods have been selectively synthesized via the hydrothermal method in nitric acid condition. The alpha-MnO2 nanowires hold with average diameter of 50 nm and lengths ranging between 10 and 40 mu m, using MnSO4 (.) H2O as manganese source; meanwhile, alpha-MnO2 bifurcate nanorods with average diameter of 100 nm were obtained by adopting MnCO3 as starting material. The morphology of alpha-MnO2 bifurcate nanorods is the first one to be reported in this paper. X-ray powder diffraction (XRD), field scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM) were used to characterize the products. Experimental results indicate that the concentrated nitric acid plays a crucial role in the phase purity and morphologies of the products. The possible formation mechanism of alpha-MnO2 nanowires and nanorods has been discussed. (c) 2006 Elsevier Inc. All rights reserved.
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