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

doi:10.19894/j.issn.1000-0518.190335

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 MoO_3-x Hexagonal Microrods as High-Efficiency Photocatalysts

TANG Fei^1,2, DU Duo-Qin¹, TAN Yun-Fei¹, QIN Li-Xiao^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

Abstract: Hexagonal MoO_3-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 MoO_3-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 MoO_3-x increases significantly with an increase in surface oxygen vacancies. For the MoO_2.799 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: MoO_3-x, Hexagonal MoO₃ microrods, Surface oxygen vacancies, Photocatalysis

CLC Number:

O644

TANG Fei, DU Duo-Qin, TAN Yun-Fei, QIN Li-Xiao. Preparation and Characterization of MoO_3-x Hexagonal Microrods as High-Efficiency Photocatalysts[J]. Chinese Journal of Applied Chemistry, 2021, 38(1): 92-98.

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Preparation and Characterization of MoO_3-x Hexagonal Microrods as High-Efficiency Photocatalysts

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