Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution
Technical Institute of Physics and Chemistry · University of Chinese Academy of Sciences · +1 more institution
Abstract
Carbon quantum dots modified P25 TiO2 composites (CQDs/P25) with a “dyade”-like structure were prepared via a facile one-step hydrothermal reaction. CQDs/P25 exhibited improved photocatalytic H2 evolution under UV-Vis and visible light (λ > 450 nm) irradiation without loading any noble metal cocatalyst, compared to pure P25. A possible mechanism of the photocatalytic H2 production activity over CQDs/P25 was proposed based on detailed measurements of the transient photocurrent response, surface photovoltage and hydroxyl radicals. CQDs play dual roles on the improved photocatalytic activity of CQDs/P25. Under UV-Vis light irradiation CQDs act as an electron reservoir to improve the efficient separation of the…
Citation impact
- FWCI
- 15.33
- Percentile
- 100%
- References
- 49
Authors
9- HYHuijun Yu
Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences
- YZYufei Zhao
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
- CZChao Zhou
Chinese Academy of Sciences, Technical Institute of Physics and Chemistry
- LSLu Shang
Chinese Academy of Sciences, Technical Institute of Physics and Chemistry
- YPYong Peng
University of Chinese Academy of Sciences, Chinese Academy of Sciences, Technical Institute of Physics and Chemistry
Topics & keywords
- Photocatalysis
- Materials science
- Visible spectrum
- Photochemistry
- Photocurrent
- Irradiation
- Hydrothermal circulation
- Carbon quantum dots