Control-Growth and Photocatalytic Activities of Low-Dimensional Bi2Fe4O9 Crystals

Low-dimensional Bi2Fe4O9 nanosheets and microrods have been selectively prepared by a solvothermal method, from which the growth of the Bi2Fe4O9 crystals can be controlled by the variation of reaction conditions. Structure determination showed that the nanosheets are mainly exposed by {001} facets w...

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Bibliographic Details
Published in:Chinese journal of chemical physics 2017-10, Vol.30 (5), p.566-570
Main Authors: Liang, Shao-wei, Yang, Qing
Format: Article
Language:English
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Summary:Low-dimensional Bi2Fe4O9 nanosheets and microrods have been selectively prepared by a solvothermal method, from which the growth of the Bi2Fe4O9 crystals can be controlled by the variation of reaction conditions. Structure determination showed that the nanosheets are mainly exposed by {001} facets while the microrods are exposed by {110} facets. Absorption spectra revealed that there are two bandgaps observed for both nanosheets (at 1.9 and 1.55 eV) and microrods (1.7 and 1.45 eV), and they both would be available for the sunlight photocatalysis efficiently due to the intensive absorption ability in a wide region. Photocatalytic investigation demonstrated that the overall photocatalytic performance of the microrods is prior to that of the nanosheets due to the variation of bandgaps and exposed facets. The present report provides a useful alternative strategy for the controlling growth of nanostructures and/or microcrystals besides the present demonstration of the Bi2Fe4O9 crystals with different bandgaps and facets that would be able to tune the corresponding photocatalytic ability selectively.
ISSN:1674-0068
2327-2244
DOI:10.1063/1674-0068/30/cjcp1704083