正六棱型MoO3-x微米柱光催化剂的制备及性能

doi:10.19894/j.issn.1000-0518.190335

摘要/Abstract

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MoO_3-x光催化材料。 MoO_3-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,MoO_3-x的催化活性明显增加。对于Mo⁵⁺摩尔分数为20.1%的MoO_2.799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: MoO_3-x, 正六棱型MoO₃微米柱, 氧空位, 光催化

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

中图分类号:

O644

唐飞, 杜多勤, 谭芸妃, 秦莉晓. 正六棱型MoO_3-x微米柱光催化剂的制备及性能[J]. 应用化学, 2021, 38(1): 92-98.

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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