材料科学
光催化
异质结
制氢
分解水
化学工程
带材弯曲
载流子
催化作用
光化学
光电子学
氢
化学
生物化学
工程类
有机化学
作者
Xibao Li,Bangbang Kang,Fan Dong,Zhiqiang Zhang,Xudong Luo,Lu Han,Juntong Huang,Zhijun Feng,Zhi Chen,Jilin Xu,Biaolin Peng,Zhong Lin Wang
出处
期刊:Nano Energy
[Elsevier]
日期:2020-12-16
卷期号:81: 105671-105671
被引量:687
标识
DOI:10.1016/j.nanoen.2020.105671
摘要
Rational design of the photocatalysis is of vital importance to mediate many important photocatalytic reactions such as water splitting, pollutant degradation and CO2 reduction. In this work, we employed a solvent evaporation induced self-assembly method to prepare a novel S-scheme heterojunction composite by combining sulfur-doped porous graphite carbon nitride (S-pCN) with tungsten oxide (WO2.72) semiconductors which manifest effective interface contact and excellent photocatalytic performance. During the formation of the heterojunction, the electron defect state of surface oxygen vacancies on WO2.72 can be filled by the lone pair electrons of sulfur and nitrogen elements on S-pCN. Through the adjustment of composite ratios, appropriate surface oxygen vacancies were retained on WO2.72, thereby fascinate the migration of electrons and the generation of free radicals. The internal electric field (IEF) and the band bending effects accelerate the transfer of photogenerated charges at the interface, thereby promotes the recombination of useless photogenerated carriers, retains photogenerated electron (e−) and hole (h+) with the higher redox potentials, improves the separation and utilization efficiency of the photogenerated carriers and enhances the photocatalytic activity of the system. This work provides new insights for the design of a novel S-scheme heterojunction photocatalyst for highly efficient simultaneous photocatalytic degradation and hydrogen evolution activity.
科研通智能强力驱动
Strongly Powered by AbleSci AI