Photoreduction adjusted surface oxygen vacancy of Bi₂MoO₆ for boosting photocatalytic redox performance

Abstract

In this study, Bi₂MoO₆ with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results show that Bi₂MoO₆ with rich oxygen vacancies is an excellent photocatalyst. The photocatalytic ability of BMO-10 is 0.3 and 3.5 times higher than that of the pristine Bi₂MoO₆ for Rhodamine B degradation and Cr(VI) reduction, respectively. The results display that the band energy of the samples with oxygen vacancies was narrowed and the light absorption was broadened. Meanwhile, the efficiency of photogenerated electron-holes was increased and the separation and transfer speed of photogenerated carriers were improved. Therefore, this work provides a convenient and efficient method to prepare potential adjustable oxygen vacancy based photocatalysts to eliminate the pollution of dyes and Cr(VI) in water.

Graphical abstract

Keywords

Bi₂MoO₆ / oxygen vacancies / photoreduction / Cr(VI) / RhB

References

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Competing interests

The authors declare that they have no competing interests.

Acknowledgements

This work was partly supported by the National Natural Science Foundation of China (Grant No. 21978276), Natural Science Foundation of Liaoning Province (No. 2021-MS-260) and Scientific Research Funding Project of the Educational Department of Liaoning Province in 2020 (No. LZ2020002). Yu Liang sincerely expresses her gratitude to the CSC scholarship.

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