期刊
APPLIED SURFACE SCIENCE
卷 544, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148885
关键词
Bi2WO6/ZnIn2S4; Direct Z-scheme; Heterojunction; Photodegradation; H-2 production
类别
资金
- Chiang Mai University
- Program Management Unit -Brain Power (PMU B)
- Office of National Higher Education Science Research and Innovation Policy Council (NXPO) in Global Partnership Project
- Center of Excellence for Innovation in Chemistry (PERCHCIC), Ministry of Higher Education, Science, Research and Innovation
- Institute for the Promotion of Teaching Science and Technology (IPST)
This study reports the photocatalytic applications of the direct Z-scheme Bi2WO6/ZnIn2S4 heterojunction in the degradation of organic pollutants and the production of H-2 gas. The photocatalyst showed high photoactivity and an enhancement in H-2 production, maintaining its efficacy even after multiple repeated cycles. The improved photo-efficacy of this heterojunction is attributed to the enhanced separation and transportation of photogenerated e(-)/h(+) through a direct Z-scheme system.
In this work, we have reported the photocatalytic applications of the direct Z-scheme Bi2WO6/ZnIn2S4 heterojunction in the degradation of organic pollutants and the production of H-2 gas. The nano-spherical shape of Bi2WO6 and porous structure of ZnIn2S4 particles, synthesized using cyclic microwave radiation method, facilitated the intimate interfacial contact of the heterojunction. Consequently, the photocatalytic activity of Bi2WO6/ ZnIn2S4 towards degradation of salicylic acid (SA) and methylene blue (MB), the models of non-dye and dye organic pollutants, were maximized after introducing only 12.5%wt of Bi2WO6. Similarly, this photocatalyst demonstrated an enhancement in H-2 production in comparison to the single-component photocatalysts. Furthermore, this photocatalyst maintained a high photoactivity after three repeated cycles for MB degradation and H-2 production. The enhanced photo-efficacy of this heterojunction originates from the improved separation and transportation of photogenerated e(-)/h(+) through a direct Z-scheme system. This was evidenced by electrochemical analyses and active species trapping experiments, combined with the consideration of reduction potential of reactive oxygen species.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据