Document Type

Article

Publication Date

2008

DOI

10.1155/2008/168716

Publication Title

Journal of Nanomaterials

Volume

2008

Issue

168716

Pages

1-9

Abstract

The effect of mechanical stirring on the morphology of hexagonal layer- structure birnessite nanoparticles produced from decomposition of KMnO4 in dilute aqueous H2SO4 is investigated, with characterization by X- ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high- resolution transmission electron microscopy (HRTEM), thermogravimetric analysis (TGA), and N2 adsorption (BET). Mechanical stirring during an initial stage of synthesis is shown to produce black birnessite containing nanofibers, whereas granular particulates of brown birnessite are produced without stirring. This is the first reduction synthesis of black birnessite nanoparticles with dendritic morphology without any use of organic reductant, and suggests that a particular morphology can arise from structural preferences of Mn in acidic conditions rather than particular organic reactants. These results enlighten the possibility of synthesizing nanoparticles with controlled size and morphology.

Comments

Copyright © 2008 Marcos A. Cheney et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Original Publication Citation

Cheney, M.A., Bhowmik, P.K., Moriuchi, S., Villalobos, M., Qian, S.Z., & Joo, S.W. (2008). The effect of stirring on the morphology of birnessite nanoparticles. Journal of Nanomaterials, 2008(168716), 1-9. doi: 10.1155/2008/168716

ORCID

0000-0002-0179-678X (Qian)

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