期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 369, 期 -, 页码 123-128出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.12.013
关键词
Flower-like spheres; Nanotubes; Dissolution-crystallization; Oriented attachment
资金
- Natural Sciences and Engineering Research Council of Canada
- Canada Research Chair
- Canada Foundation for Innovation
- Ontario Early Researcher Award
- University of Western Ontario
Birnessite flower-like and alpha-type tubular MnO2 nanostructures were selectively synthesized through simple decomposition of KMnO4 under hydrochloric acid condition by controlling reaction temperature using a microwave-assisted hydrothermal method. The as-prepared samples were characterized in detail by various techniques including X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform-infrared spectroscopy, and Raman scattering spectroscopy. While the growth of flower-like birnessite-MnO2 might follow a widely accepted Ostwald ripening process, we proposed a formation mechanism of the nanotubular alpha-MnO2 based on our evidence, which was assembly of nanorods through an oriented attachment process. (C) 2011 Elsevier Inc. All rights reserved.
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