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Synthesis of metal-phase-assisted 1T@2H-MoS2 nanosheet-coated black TiO2 spheres with visible light photocatalytic activities

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Abstract

Hybrid-phase-MoS2 (1T@2H-MoS2) nanosheet-coated black TiO2 spheres (1T@2H-MoS2/B-TiO2) were prepared using a hydrothermal method and a chemical reduction method under an argon atmosphere. X-ray diffraction, transmission electron microscope, Raman spectra and X-ray photoelectron spectroscopy indicated the generation of the 1T@2H-MoS2 and black TiO2. The efficiency of the 1T@2H-MoS2/B-TiO2 core–shell structure degradation of rhodamine B (RhB) reached 98.0%. The high photocatalytic activity was due to the presence of 1T-MoS2, which accelerated the electron transfer to participate in the redox reaction. In addition, the presence of B-TiO2 suppressed the undesirable electron–hole recombination. Finally, the synergistic effect between 1T@2H-MoS2 and B-TiO2 promoted the separation of the photoelectron–hole pairs. Moreover, scavenger studies found that the hydroxyl radical (•OH) was the dominant reactive oxygen species in the degradation of RhB under visible light irradiation. The possible growth mechanism and photocatalytic mechanism are discussed in detail. The results of this study will contribute to the improvement in the visible light absorption and photocatalytic degradation of catalysts.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 11264037, 51602273, 61464010, and 61604126), Wuhan University of Technology (2018-KF-14), Doctoral fund of Xin Jiang University (BS150219), and Natural Science Foundation of Xinjiang (2017D01C055).

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Authors and Affiliations

  1. School of Physics Science and Technology, Xinjiang University, Ürümqi, China

    Hongmei Fan, Rong Wu, Haiyang Liu, Xi Yang, Yanfei Sun & Chu Chen

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  1. Hongmei Fan
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  2. Rong Wu
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  3. Haiyang Liu
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  4. Xi Yang
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  5. Yanfei Sun
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  6. Chu Chen
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Correspondence to Rong Wu.

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Fan, H., Wu, R., Liu, H. et al. Synthesis of metal-phase-assisted 1T@2H-MoS2 nanosheet-coated black TiO2 spheres with visible light photocatalytic activities. J Mater Sci 53, 10302–10312 (2018). https://doi.org/10.1007/s10853-018-2266-8

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