Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (1): 92-98.DOI: 10.19894/j.issn.1000-0518.190335

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Preparation and Characterization of MoO3-x Hexagonal Microrods as High-Efficiency Photocatalysts

TANG Fei1,2, DU Duo-Qin1, TAN Yun-Fei1, QIN Li-Xiao1*   

  1. 1School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China;
    2Chongqing Star-Tech & JRS Specialty Products Co. Ltd., Chongqing 401221, China
  • Received:2019-12-16 Revised:2020-08-14 Published:2021-01-01 Online:2021-02-01
  • Supported by:
    National Natural Science Foundation of China(No.21776025), the Fundamental Research Funds for the Central Universities(Nos.2018CDKYGL0002, 2018CDKYHG0028) and Chongqing Research Program of Basic Research and Frontier Technology(No.CSTC2016JCYJA0474)

Abstract: Hexagonal MoO3-x microrods with rich surface oxygen vacancies were prepared from MoO3 using a facile and controllable one-step reduction method with ascorbic acid as the reducing agent. The as-prepared MoO3-x microrods exhibit much better photocatalytic activity than MoO3 for degrading Rhodamine B due to the narrower band gap and wider range of sunlight absorption. Moreover, the photocatalytic activity of MoO3-x increases significantly with an increase in surface oxygen vacancies. For the MoO2.799 sample with a Mo5+ content of 20.1%, it only takes 60 minutes to degrade 90% of Rhodamine B in a solution with an initial concentration of 10 mg/L. This study may present a new strategy to synthesize semiconductor photocatalysts.

Key words: MoO3-x, Hexagonal MoO3 microrods, Surface oxygen vacancies, Photocatalysis

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