三元运算
光催化
异质结
方案(数学)
阳光
材料科学
光电子学
三元数制
化学工程
可见光谱
光化学
化学
核化学
光降解
带隙
X射线光电子能谱
一锅法合成
辐照
光学
数学
物理
计算机科学
有机化学
催化作用
量子力学
数学分析
程序设计语言
作者
Chongfei Yu,Wang Ke,Pengyan Yang,Shengnan Yang,Chen Lu,Yingze Song,Shuying Dong,Jingyu Sun,Jingyu Sun
标识
DOI:10.1016/j.apsusc.2017.05.147
摘要
Abstract The construction of solid-state Z-scheme heterojunction photocatalytic system to efficiently tailor the photoinduced charge separation is of great significance to water purification. In this study, we reported for the first time the controlled preparation of Bi2S3/SnS2/Bi2O3 double Z-scheme heterojunction photocatalyst by a simple one-pot solvothermal route. The experimental results with regard to rhodamine B (RhB) degradation showed that the as-fabricated heterojunctions can significantly enhance photocatalytic activity in comparison with pure Bi2S3. In addition, the optimized BiS-4 sample possessed good simulated-sunlight photocatalytic efficiency towards the degradation of other types of dyes, including methyl orange (MO), methylene blue (MB), orange IV (OG IV) and crystal violet (CV). By further probing the charge separation and migration behaviors, studying the band structure, as well as conducting the active species trapping experiments, a possible double Z-scheme photocatalytic mechanism was proposed, which not only benefited the efficient photogenerated electron-hole pair separation but also demonstrated advanced capacity for the removal of organic dyes. This work would pave the route towards the design of novel Z-scheme photocatalytic systems for energy conversion and environmental remediation.
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