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Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts
Abstract
A facile hydrothermal synthesis route to N and S, N co-doped graphene quantum dots (GQDs) was developed by using citric acid as the C source and urea or thiourea as N and S sources. Both N and S, N doped GQDs showed high quantum yield (78% and 71%), excitation independent under excitation of 340-400 nm and single exponential decay under UV excitation. A broad absorption band in the visible region appeared in S, N co-doped GQDs due to doping with sulfur, which alters the surface state of GQDs. However, S, N co-doped GQDs show different color emission under excitation of 420-520 nm due to their absorption in the visible region. The excellent photocatalytic performance of the S, N co-doped GQD/TiO2 composites was demonstrated by degradation of rhodamine B under visible light. The apparent rate of S, N:GQD/TiO2 is 3 and 10 times higher than that of N:GQD/TiO2 and P25 TiO2 under visible light irradiation, respectively.
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Cited by
Glowing Graphene Quantum Dots and Carbon Dots: Properties, Syntheses, and Biological Applications
Zheng, X. T., Ananthanarayanan, A., Luo, K. Q., & Chen, P. (2015) · Small · doi:10.1002/smll.201402648 · Cited by 2,190
An overview of nanoparticles commonly used in fluorescent bioimaging
Wolfbeis, O. S. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00392f · Cited by 1,631
Song, Y., Zhu, S., Zhang, S., Fu, Y., Wang, L., Zhao, X., & Yang, B. (2015) · Journal of Materials Chemistry C · doi:10.1039/c5tc00813a · Cited by 803
Nitrogen and sulfur co-doped carbon dots with strong blue luminescence
Ding, H., Wei, J.-S., & Xiong, H.-M. (2014) · Nanoscale · doi:10.1039/c4nr04267k · Cited by 608
Self-targeting fluorescent carbon dots for diagnosis of brain cancer cells.
Zheng, M., Ruan, S., Liu, S., Sun, T., Qu, D., Zhao, H., Xie, Z., Gao, H., Jing, X., & Sun, Z. (2015) · ACS Nano · doi:10.1021/acsnano.5b05575 · Cited by 593
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Metadata
- Authors
- Qu, D., Zheng, M., Du, P., Zhou, Y., Zhang, L., Li, D., Tan, H., Zhao, Z., Xie, Z., & Sun, Z.
- Venue
- Nanoscale
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2013
- Volume
- 5
- Issue
- 24
- Pages
- 12272
- ISSN
- 2040-3364 (ISSN-L)
- 2040-3372
- OpenAlex
- W2033222042
- Cited by
- 1,183
- References
- 0
- FWCI
- 28.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- Qu, D., Zheng, M., Du, P., Zhou, Y., Zhang, L., Li, D., Tan, H., Zhao, Z., Xie, Z., & Sun, Z. (2013). Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts. Nanoscale. https://doi.org/10.1039/c3nr04402e
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