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Porous structure dependent photoreactivity of graphitic carbon nitride under visible light
Abstract
We demonstrate that graphitic carbon nitride can photoreduce CO2 to CO in the presence of water vapor and exhibit interesting porous structure dependent reactivity on photoreduction and photooxidation under visible light (λ > 420 nm). Graphitic carbon nitride was synthesized by directly heating the inexpensive melamine and the replacement of melamine with melamine hydrochloride could result in porousification in the final graphitic carbon nitride with much higher surface area (39 times) and more abundant pores, accompanied by a band gap increase of 0.13 eV. The porousification could significantly enhance the photoreactivity of graphitic carbon nitride in rhodamine B photooxidation by 9.4 times, but lower its activity in CO2 photoreduction by 4.6 times. The reasons for the porous structure dependent photoreactivity were investigated in detail. These new findings could shed light on the design of efficient photocatalysts and the tuning of their photoreactivity for environmental and energy applications.
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Cites
Electrochemical Photolysis of Water at a Semiconductor Electrode
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Environmental applications of semiconductor photocatalysis
Hoffmann, M. R., Martin, S. T., Choi, W., & Bahnemann, D. W. (1995) · Chemical Reviews · doi:10.1021/cr00033a004 · Cited by 18,495
Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results
Linsebigler, A. L., Lu, G., & Yates, J. T. (1995) · Chemical Reviews · doi:10.1021/cr00035a013 · Cited by 11,575
Cited by
Ong, W.-J., Tan, L.-L., Ng, Y. H., Yong, S.-T., & Chai, S.-P. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00075 · Cited by 7,147
Tong, Z., Yang, D., Shi, J., Nan, Y., Sun, Y., & Jiang, Z. (2015) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.5b09503 · Cited by 431
Hao, R., Wang, G., Jiang, C., Tang, H., & Xu, Q. (2017) · Applied Surface Science · doi:10.1016/j.apsusc.2017.03.197 · Cited by 319
Jhong, H. M., Tornow, C. E., Smid, B., Gewirth, A. A., Lyth, S. M., & Kenis, P. J. A. (2017) · ChemSusChem · doi:10.1002/cssc.201600843 · Cited by 125
Metadata
- Authors
- Dong, G., & Zhang, L.
- Venue
- J. Mater. Chem.
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2012
- Volume
- 22
- Issue
- 3
- Pages
- 1160-1166
- ISSN
- 0959-9428 (ISSN-L)
- 1364-5501
- OpenAlex
- W2145142824
- Cited by
- 501
- References
- 4
- FWCI
- 7.62
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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