在BiOBr中以氧为媒介的激发解离,以促进带电载体参与的分子氧激活
Hui Wang1, Dingyu Yong1, Shichuan Chen1
1Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience, iChEM, Synergetic Innovation Center of Quantum Information and Quantum Physics, National Synchrotron Radiation Laboratory, University of Science and Technology of China , Hefei, Anhui 230026, P.R. China.
Journal of the American Chemical Society
|January 11, 2018
概括
在氧化 (BiOBr) 催化剂中的氧空位有效地将激子分解成电荷载体. 这种缺陷工程提高了超氧化物生成和有机合成等反应的光催化性能.
科学领域:
- 材料科学
- 光催化
- 半导体物理
背景情况:
- 由电子孔库伦相互作用驱动的刺激效应在半导体光诱导过程中至关重要.
- 尽管光催化作用具有重要意义,但有限的研究已经探讨了激发效应.
- 催化剂激子可以阻碍自由电荷载体的产生,影响光催化效率.
研究的目的:
- 研究激子在光催化剂中的电荷载体的解离.
- 通过优化电荷载体生成来增强光催化性能.
- 证明缺陷工程在调节激发效应中的作用.
主要方法:
- 使用氧化 (BiOBr) 作为模型光催化剂.
- 将氧气空缺纳入生物Br结构.
- 在可见光照明下评估光催化活性.
主要成果:
- 通过BiOBr中的氧空位,证明了激子有效分裂成电荷载体.
- 在超氧化物生成中取得了卓越的光催化性能.
- 在选择性有机合成中展示了高效率.
结论:
- 在光催化剂中,氧气空缺对于激子转化为自由电荷载体至关重要.
- 缺陷工程为调整激发效应和改善光催化提供了可行的策略.
- 这项研究为先进的光催化剂设计提供了缺陷结构的见解.
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