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Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution
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 photoinduced electron–hole pairs of P25. However, under visible light irradiation CQDs act as a photosensitizer to sensitize P25 into a visible light response “dyade” structure for H2 evolution.
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Cited by
Solar Hydrogen Production Using Carbon Quantum Dots and a Molecular Nickel Catalyst
Martindale, B. C. M., Hutton, G. A. M., Caputo, C. A., & Reisner, E. (2015) · Journal of the American Chemical Society · doi:10.1021/jacs.5b01650 · Cited by 632
He, Z., Liang, R., Zhou, C., Yan, G., & Wu, L. (2021) · Separation and Purification Technology · doi:10.1016/j.seppur.2020.117725 · Cited by 90
Self-citationApplications of carbon dots and its modified carbon dots in bone defect repair
Zhu, L., Kong, W., Ma, J., Zhang, R., Qin, C., Liu, H., & Pan, S. (2022) · Journal of Biological Engineering · doi:10.1186/s13036-022-00311-x · Cited by 25
Metadata
- Authors
- Yu, H., Zhao, Y., Zhou, C., Shang, L., Peng, Y., Cao, Y., Wu, L.-Z., Tung, C.-H., & Zhang, T.
- Venue
- Journal of Materials Chemistry A
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 2
- Issue
- 10
- Pages
- 3344
- ISSN
- 2050-7488 (ISSN-L)
- 2050-7496
- OpenAlex
- W1974788909
- Cited by
- 716
- References
- 0
- FWCI
- 14.31
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yu, H., Zhao, Y., Zhou, C., Shang, L., Peng, Y., Cao, Y., Wu, L.-Z., Tung, C.-H., & Zhang, T. (2014). Carbon quantum dots/TiO2 composites for efficient photocatalytic hydrogen evolution. Journal of Materials Chemistry A. https://doi.org/10.1039/c3ta14108j
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