Fabrication of flower-shaped Bi2O3 superstructure by a facile template-free process |
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Authors: | Li ZhangYoshio Hashimoto Toshinori TaishiIsao Nakamura Qing-Qing Ni |
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Institution: | a Faculty of Engineering, Shinshu University, Japan b Department of Functional Machinery & Mechanics, Shinshu University, 3-15-1 Tokida, Ueda 386-8567 Japan |
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Abstract: | A novel flower-shaped Bi2O3 superstructure has been successfully synthesized by calcination of the precursor, which was prepared via a citric acid assisted hydrothermal process. The precursor and Bi2O3 were characterized with respect to morphology, crystal structure and elemental chemical state by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It was shown that both the precursor and Bi2O3 flower-shaped superstructure were constructed of numerous nanosheets while the nanosheets consisted of a great deal of nanoparticles. Furthermore, key factors for the formation of the superstructures have been proposed; a mechanism for the growth of the superstructure has been presented based on the FESEM investigation of different growth stages. |
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Keywords: | Bi2O3 Superstructure Hydrothermal |
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