正六棱型MoO_(3-x)微米柱光催化剂的制备及性能  

Preparation and Characterization of MoO_(3-x) Hexagonal Microrods as High-Efficiency Photocatalysts

作　　者：唐飞 杜多勤 谭芸妃[1] 秦莉晓[1] TANG Fei;DU Duo-Qin;TAN Yun-Fei;QIN Li-Xiao(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China;Chongqing Star-Tech&JRS Specialty Products Co.Ltd.,Chongqing 401221,China)

机构地区：[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

出　　处：《应用化学》2021年第1期92-98,共7页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(No.21776025);中央高校基本科研业务费(Nos.2018CDKYGL0002,2018CDKYHG0028);重庆市基础研究与前沿技术研究计划(No.CSTC2016JCYJA0474)资助。

摘　　要：首先采用低温水相合成法制备了正六棱型MoO_(3)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Mo^(5+)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。Hexagonal MoO_(3-x) microrods with rich surface oxygen vacancies were prepared from MoO_(3) 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 MoO_(3) 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 MoO 2.799 sample with a Mo^(5+)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.

关 键 词：MoO_(3-x) 正六棱型MoO_(3)微米柱 氧空位 光催化 

分 类 号：O644[理学—物理化学]