应用化学 ›› 2021, Vol. 38 ›› Issue (1): 92-98.DOI: 10.19894/j.issn.1000-0518.190335

• 研究论文 • 上一篇    下一篇

正六棱型MoO3-x微米柱光催化剂的制备及性能

唐飞1,2, 杜多勤1, 谭芸妃1, 秦莉晓1*   

  1. 1重庆大学化学化工学院,重庆 401331
    2重庆斯泰克瑞登梅尔材料技术有限公司,重庆 401221
  • 收稿日期:2019-12-16 修回日期:2020-08-14 出版日期:2021-01-01 发布日期:2021-02-01
  • 通讯作者: *E-mail:lxqin@cqu.edu.cn
  • 基金资助:
    国家自然科学基金(No.21776025)、中央高校基本科研业务费(Nos.2018CDKYGL0002, 2018CDKYHG0028)和重庆市基础研究与前沿技术研究计划(No.CSTC2016JCYJA0474)资助

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)

摘要: 首先采用低温水相合成法制备了正六棱型MoO3微米柱,然后以抗坏血酸为还原剂一步还原法制备了一种表面氧空位可控的MoO3-x光催化材料。 MoO3-x具有较窄的禁带宽度和较大的光吸收范围。 以罗丹明B为模拟污染物的光催化降解实验表明,随着氧空位的增加,MoO3-x的催化活性明显增加。 对于Mo5+摩尔分数为20.1%的MoO2.799样品,降解90%的初始质量浓度为10 mg/L的罗丹明溶液只需要60 min。 本研究为高性能半导体光催化材料的制备提供了一种新思路。

关键词: MoO3-x, 正六棱型MoO3微米柱, 氧空位, 光催化

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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