Enhanced Photoexcited Carrier Separation in Oxygen‐Doped ZnIn 2 S 4 Nanosheets for Hydrogen Evolution
University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +2 more institutions
Abstract
Limited by the relatively sluggish charge-carrier separation in semiconductors, the photocatalytic performance is still far below what is expected. Herein, a model of ZnIn2 S4 (ZIS) nanosheets with oxygen doping is put forward to obtain in-depth understanding of the role that doping atoms play in photocatalysis. It shows enhanced photocatalytic activity compared with pristine ZIS. The electron dynamics analyzed by ultrafast transient absorption spectroscopy reveals that the average recovery lifetime of photoexcited electrons is increased by 1.53 times upon oxygen incorporation into the ZIS crystals, indicating enhanced separation of photoexcited carriers in oxygen-doped ZIS nanosheets. As expected, the…
Citation impact
- FWCI
- 13.57
- Percentile
- 100%
- References
- 27
Authors
9- WYWenlong Yang
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Collaborative Innovation Center of Chemistry for Energy Materials
- LZLei Zhang
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Collaborative Innovation Center of Chemistry for Energy Materials
- JXJunfeng Xie
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Collaborative Innovation Center of Chemistry for Energy Materials
- XZXiaodong ZhangCorresponding
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Collaborative Innovation Center of Chemistry for Energy Materials
- QLQinghua Liu
University of Science and Technology of China, National Synchrotron Radiation Laboratory
Topics & keywords
- Photocatalysis
- Doping
- Oxygen
- Materials science
- Charge carrier
- Hydrogen
- Photochemistry
- Ultrafast laser spectroscopy
Funding
- NNNational Natural Science Foundation of ChinaAwards: 11422547, 21401181, U153226, 21331005, 91422303, 21471143, 11321503, 21573211
- NKNational Key Research and Development Program of ChinaAward: 2015CB932302
- FRFundamental Research Funds for the Central UniversitiesAwards: WK2060190027, WK2310000050, WK2340000063