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Layered Bi2MoO6/LDH hetero-structured composites with enhanced visible light photocatalytic activity

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Abstract

Series of Bi2MoO6/NiAl-LDH hetero-junction photocatalysts were synthesized by a two-step hydrothermal method with a self-assembled process. It indicated that the in-situ intercalated NiAl-LDH showed a tight contact with Bi2MoO6 layers and thus exhibited the rapid transfer of photogenerated electrons on the interface. The photocatalytic performance was evaluated by the degradation of rhodamine B (RhB) under visible light irradiation. The resulted Bi2MoO6/NiAl-LDH sample showed a higher visible-light photocatalytic activity for the degradation of RhB than any single component. The optimal LDH content in Bi2MoO6/NiAl-LDH is 15% with the degradation efficiency for more than 90% during 60 min. The excessive amount of NiAl-LDH in Bi2MoO6/NiAl-LDH could reduce the light absorption efficiency of Bi2MoO6 and thus affected the generation of photoinduced electron–hole pairs. The enhanced photocatalytic activity and stability of Bi2MoO6/NiAl-LDH was attributed to the synergistic effects of the introduction of narrow band-gap NiAl-LDH and the construction of layered hetero-junction. Our synthetic method of self-assembly sheets has certain guided significance for the synthesis and application of other photocatalysts.

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Acknowledgements

This work was supported the National Natural Science Foundation of China (NSFC) (Grants 21603182), University Science Research Project of Jiangsu Province (Grants 2016097), The natural science Foundation of the Jiangsu Higher Education Institutions of China (Grants 201703196).

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  1. School of Chemistry & Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, People’s Republic of China

    Fengxian Hu, Entian Cui, Hongxia Liu, Jing Wu, Yong Dai & Guiyun Yu

  2. School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang, 212013, People’s Republic of China

    Fengxian Hu

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  1. Fengxian Hu
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Hu, F., Cui, E., Liu, H. et al. Layered Bi2MoO6/LDH hetero-structured composites with enhanced visible light photocatalytic activity. J Mater Sci: Mater Electron 30, 2572–2584 (2019). https://doi.org/10.1007/s10854-018-0532-9

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