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Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation
Open accessAbstract
Environment-friendly metal-free photocatalysts represent a promising alternative to conventional metal-based semiconductors. In this report, a carbon dots (CDs) decorated graphitic carbon nitride (g-C3N4) photocatalyst was synthesized via a facile impregnation-thermal method. Under visible light irradiation, a very low CDs content of 0.5 web in the g-C3N4/CDs composite resulted in a 3.7 times faster reaction rate for phenol photodegradation than pristine g-C3N4. Spectroscopic and photoelectrochemical characterizations revealed that impregnation of CDs into g-C3N4 not only enhanced the production of photogenerated electron-hole pairs by extending the visible light absorption region due to the upconverted photoluminescence character of CDs, but also facilitated electron-hole separation by band alignment in the g-C3N4/CDs junction, thus yielded more holes, O-center dot(2)- and (OH)-O-center dot radicals to promote phenol degradation. These results highlight the potential application of sustainable metal-free photocatalysts in water purification. (C) 2015 Elsevier B.V. All rights reserved.
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Cited by
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Metadata
- Authors
- Zhang, H., Zhao, L., Geng, F., Guo, L.-H., Wan, B., & Yang, Y.
- Venue
- Applied Catalysis B: Environmental
- Publisher
- Elsevier BV
- Published
- 2016-01
- Volume
- 180
- Pages
- 656-662
- ISSN
- 0926-3373 (ISSN-L)
- OpenAlex
- W1162606687
- Cited by
- 371
- References
- 4
- FWCI
- 11.93
- Type
- journal article
- Language
- en
- Open access
- green
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- Zhang, H., Zhao, L., Geng, F., Guo, L.-H., Wan, B., & Yang, Y. (2016). Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2015.06.056
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