The DOI matches its Crossref record; 67 of the 67 references it cites were found in a registry or an index.
Time-Resolved Spectroscopic Investigation of Charge Trapping in Carbon Nitrides Photocatalysts for Hydrogen Generation
Open accessAbstract
Abstract Carbon nitride (g-C3N4) as a benchmark polymer photocatalyst is attracting significant research interest because of its visible light photocatalytic performance combined with good stability and facile synthesis. However, little is known about the fundamental photophysical processes of g-C3N4, which are key to explain and promote photoactivity. Using time-resolved absorption and photoluminescence spectroscopies, we have investigated the photophysics of a series of carbon nitrides on time scales ranging from femtoseconds to seconds. Free charge carriers form within a 200 fs excitation pulse, trap on the picosecond time scale with trap states in a range of energies, and then recombine with power law decays that are indicative of charge trapping–detrapping processes. Delayed photoluminescence is assigned to thermal excitation of trapped carriers back up to the conduction/valence bands. We develop a simple, quantitative model for the charge carrier dynamics in these photocatalysts, which includes carrier relaxation into an exponential tail of trap states extending up to 1.5 eV into the bandgap. This trapping reduces the efficiency of surface photocatalytic reactions. Deep trapped electrons observed on micro- to millisecond time scales are unable to reduce electron acceptors on the surface or in solution. Within a series of g-C3N4, the yield of these unreactive trapped electrons correlates inversely with H2 evolution rates. We conclude by arguing that the photophysics of these carbon nitride materials show closer parallels with inorganic semiconductors than conjugated polymers, and that the key challenge to optimize photocatalytic activity of these materials is to prevent electron trapping into deep, and photocatalytically inactive, electron trap states.
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Cites
A metal-free polymeric photocatalyst for hydrogen production from water under visible light
Wang, X., Maeda, K., Thomas, A., Takanabe, K., Xin, G., Carlsson, J. M., Domen, K., & Antonietti, M. (2009) · Nature Materials · doi:10.1038/nmat2317 · Cited by 12,532
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
Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals
Chen, X., Liu, L., Yu, P. Y., & Mao, S. S. (2011) · Science · doi:10.1126/science.1200448 · Cited by 6,245
Understanding TiO2Photocatalysis: Mechanisms and Materials
Schneider, J., Matsuoka, M., Takeuchi, M., Zhang, J., Horiuchi, Y., Anpo, M., & Bahnemann, D. W. (2014) · Chemical Reviews · doi:10.1021/cr5001892 · Cited by 5,992
Metal-free efficient photocatalyst for stable visible water splitting via a two-electron pathway
Liu, J., Liu, Y., Liu, N., Han, Y., Zhang, X., Huang, H., Lifshitz, Y., Lee, S.-T., Zhong, J., & Kang, Z. (2015) · Science · doi:10.1126/science.aaa3145 · Cited by 4,468
Polymeric Photocatalysts Based on Graphitic Carbon Nitride
Cao, S., Low, J., Yu, J., & Jaroniec, M. (2015) · Advanced Materials · doi:10.1002/adma.201500033 · Cited by 3,674
Choi, W., Termin, A., & Hoffmann, M. R. (1994) · The Journal of Physical Chemistry · doi:10.1021/j100102a038 · Cited by 3,655
Wang, Y., Wang, X., & Antonietti, M. (2012) · Angewandte Chemie International Edition · doi:10.1002/anie.201101182 · Cited by 3,364
Self-citationCharge Photogeneration in Organic Solar Cells
Clarke, T. M., & Durrant, J. R. (2010) · Chemical Reviews · doi:10.1021/cr900271s · Cited by 2,372
Self-citationDevice Physics of Polymer:Fullerene Bulk Heterojunction Solar Cells
Blom, P. W. M., Mihailetchi, V. D., Koster, L. J. A., & Markov, D. E. (2007) · Advanced Materials · doi:10.1002/adma.200601093 · Cited by 2,299
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Wang, Y., Chen, E., & Tang, J. (2022) · ACS Catalysis · doi:10.1021/acscatal.2c01012 · Cited by 566
Self-citationXiao, X., Gao, Y., Zhang, L., Zhang, J., Zhang, Q., Li, Q., Bao, H., Zhou, J., Miao, S., Chen, N., et al. (2020) · Advanced Materials · doi:10.1002/adma.202003082 · Cited by 528
Zhang, S., Cheng, G., Guo, L., Wang, N., Tan, B., & Jin, S. (2020) · Angewandte Chemie International Edition · doi:10.1002/anie.201914424 · Cited by 403
Shi, D., Zheng, R., Sun, M., Cao, X., Sun, C., Cui, C., Liu, C., Zhao, J., & Du, M. (2017) · Angewandte Chemie International Edition · doi:10.1002/anie.201709869 · Cited by 308
Linker-controlled polymeric photocatalyst for highly efficient hydrogen evolution from water
Wang, Y., Bayazit, M. K., Moniz, S. J. A., Ruan, Q., Lau, C. C., Martsinovich, N., & Tang, J. (2017) · Energy & Environmental Science · doi:10.1039/c7ee01109a · Cited by 258
Self-citationShi, X., Fujitsuka, M., Kim, S., & Majima, T. (2018) · Small · doi:10.1002/smll.201703277 · Cited by 258
Metadata
- Authors
- Godin, R., Wang, Y., Zwijnenburg, M. A., Tang, J., & Durrant, J. R.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-03-31
- Volume
- 139
- Issue
- 14
- Pages
- 5216-5224
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2600596882
- Cited by
- 614
- References
- 67
- FWCI
- 14.94
- Type
- journal article
- Language
- en
- Open access
- hybrid
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