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Issue 33, 2011
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Synthesis of highly symmetrical BiOI single-crystal nanosheets and their {001} facet-dependent photoactivity

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Abstract

Highly symmetrical BiOI single-crystal nanosheets (BiOI SCNs) with dominant exposed {001} facets (up to 95%) have been synthesized by annealing BiI3 and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, high-resolution transmission electron microscopy, fast-Fourier transform pattern, UV-vis diffuse reflectance and photoluminescence. The thickness and the {001} facets percentage of BiOI SCNs can be tuned by changing the annealing temperature. The thermal decomposition process of BiI3 and the formation mechanism of BiOI SCNs were investigated. BiOI SCNs exhibit higher photoactivity (about 7 times) than irregular BiOI for degradation of Rhodamine B (RhB) dye under visible light irradiation. The {001} facets are the reactive facets of BiOI. The origin of {001} facets-dependent photoactivity is due to an improvement of the separation efficiency of photo-induced electrons and holes.

Graphical abstract: Synthesis of highly symmetrical BiOI single-crystal nanosheets and their {001} facet-dependent photoactivity

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Publication details

The article was received on 08 Mar 2011, accepted on 10 Jun 2011 and first published on 19 Jul 2011


Article type: Paper
DOI: 10.1039/C1JM11005E
Citation: J. Mater. Chem., 2011,21, 12479-12484
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    Synthesis of highly symmetrical BiOI single-crystal nanosheets and their {001} facet-dependent photoactivity

    L. Ye, L. Tian, T. Peng and L. Zan, J. Mater. Chem., 2011, 21, 12479
    DOI: 10.1039/C1JM11005E

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