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Crystal-chemistry insight into the photocatalytic activity of BiOCl x Br1−x nanoplate solid solutions

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Abstract

In this study, a facile alcoholysis method was developed to synthesize BiOCl x Br1−x nanoplates at room temperature and atmospheric pressure. In this route, strong acid or alkaline environment was absolutely avoided to realize the high exposure of {001} crystal facets. The regular changes in XRD peaks and cell parameters as a function of the Br content strongly declared that the obtained BiOCl x Br1−x products belonged to a group of solid solutions. The 2D nanosheets with in-plane wrinkles were clearly observed in TEM images. Interestingly, as the Br content increased, band gaps of BiOCl x Br1−x solid solutions gradually decreased. The photocatalytic degradation of RhB under simulated sunlight irradiation indicated that BiOCl0.5Br0.5 had the best photocatalytic activity. From the viewpoint of crystal chemistry, the photocatalytic activity of BiOCl x Br1−x solid solutions was closely related with the exposure amount of {001} facets, interlayer spacing of (001) plane and energy-level position of valence band.

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Acknowledgements

We express our great appreciation for the financial support of the Program for New Century Excellent Talents in Heilongjiang Provincial Universities (1253-NCET-010).

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  1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, China

    Huan-Yan Xu, Xu Han, Qu Tan, Ke-Jia Wu & Shu-Yan Qi

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  1. Huan-Yan Xu
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Correspondence to Huan-Yan Xu.

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Xu, HY., Han, X., Tan, Q. et al. Crystal-chemistry insight into the photocatalytic activity of BiOCl x Br1−x nanoplate solid solutions. Front. Mater. Sci. 11, 120–129 (2017). https://doi.org/10.1007/s11706-017-0379-7

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