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Layered BiOBr/Ti3C2 MXene composite with improved visible-light photocatalytic activity

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Abstract

Layered BiOBr/Ti3C2 (BTC) composites were synthesized by first preparing Ti3C2 nanosheets through the liquid etching of Ti3AlC2 powder and then hybridizing with BiOBr via a facile reflux process. The morphology, crystal structure, light-harvesting capacity, chemical nature of atoms and visible-light photocatalytic degradation activity were systematically studied and discussed. It was found that the introduction of Ti3C2 nanosheets improved UV–Vis light absorption region of BiOBr. A contact interface was formed between BiOBr nanoplate and Ti3C2 nanosheet due to the similar layered structures, which could accelerate the efficient separation and transfer of photoinduced electrons and holes. Thus, the obtained BTC composites showed the higher visible-light photocatalytic activity for the degradation of RhB than pure BiOBr. The generated active species were determined by the active species capture experiment and ESR spectra, showing that ·O2− and ·OH played a crucial role in the photocatalytic degradation of RhB. The corresponding photocatalytic mechanism was proposed. This work may provide a new insight into the construction of earth-abundant MXene-based photocatalysts with high performance and low cost.

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Acknowledgements

The authors greatly appreciate the financial support of Natural Science Foundation of Jiangsu Province (No. BK20160434 and BK20160061), National Natural Science Foundation of China (No. 21773116, 11474246 and 21671167), China Postdoctoral Science Foundation (No. 2018M632283), Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP, 20130091110010), Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (No. PPZY2015A025) and Qing Lan Project.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, People’s Republic of China

    Chao Liu, Qixiang Xu, Qinfang Zhang, Yisong Zhu, Mingwei Ji, Yu Zhang & Jianguang Xu

  2. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People’s Republic of China

    Chao Liu & Wenhua Hou

  3. School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang, 222005, People’s Republic of China

    Zhiwei Tong

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  1. Chao Liu
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Correspondence to Wenhua Hou or Jianguang Xu.

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Liu, C., Xu, Q., Zhang, Q. et al. Layered BiOBr/Ti3C2 MXene composite with improved visible-light photocatalytic activity. J Mater Sci 54, 2458–2471 (2019). https://doi.org/10.1007/s10853-018-2990-0

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