S型异质结光催化剂ZnFe2O4/WO3的构筑及光催化还原CO2性能
Construction and photocatalytic CO2 reduction performance of S-scheme heterojunction ZnFe2O4/WO3 catalysts
刘平 1朱成才 1李艳阳 1要红昌1
作者信息
- 1. 郑州大学化学学院,绿色催化中心,郑州 450001
- 折叠
摘要
通过在WO3纳米片表面负载ZnFe2O4纳米颗粒,构建了一系列S型异质结光催化剂ZnFe2O4/WO3,并研究了其光催化CO2还原性能.在没有助催化剂和牺牲剂的条件下,所制备的ZnFe2O4/WO3复合材料可对CO2与水蒸汽进行光催化反应.优化后的材料光照5h后CO2还原产物CO和CH4的产量分别为7.87和4.88μmol·g-1.相对于单相组分,CO和CH4的产量明显提高.光催化活性的提高,归因于ZnFe2O4和WO3异质结的形成以及光生载流子的S型电荷传输模式.
Abstract
A series of ZnFe2O4/WO3 photocatalysts were constructed by loading ZnFe2O4 nanoparticles on the sur-face of WO3 nanosheets,and their performance for photocatalytic CO2 reduction was studied.Under the conditions of no cocatalysts and sacrificial agents,the prepared ZnFe2O4/WO3 composite materials can catalyze the reaction between CO2 and water vapor.After illumination for 5 h,the yields of CO2 reduction products CO and CH4 of the optimal material were 7.87 and 4.88 umol·g-1,respectively.Compared to its counterparts,the yields of CO and CH4 were improved.The increased photocatalytic activity of ZnFe2O4/WO3 is attributed to the formation of heterojunc-tions between ZnFe2O4 and WO3 as well as the S-scheme charge transfer mode of the photogenerated carriers,both of which are conducive to separation efficiency of photo-generated carriers and photocatalytic CO2 reduction activity.
关键词
CO2还原/光催化活性/ZnFe2O4/WO3/异质结/S型电荷传输模式Key words
CO2 reduction/Photocatalytic activity/ZnFe2O4/WO3/heterojunction/S-scheme change transfer mode引用本文复制引用
基金项目
河南省自然科学基金(222300420526)
出版年
2024
NETL
NSTL
万方数据