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Origin of the enhanced visible-light photocatalytic activity of CNT modified g-C3N4 for H2 production
Abstract
Graphitic carbon nitride (g-C3N4) hybridized with a small number of multi-walled carbon nanotubes (CNT) was synthesized using cyanamide as precursor. The optimal CNT content is found to be ∼0.2 wt% in the composite, which displays a 2.4-fold enhancement in photocatalytic water splitting over pure g-C3N4. Characterizations by a series of joint techniques including Raman spectra, UV/vis diffuse reflectance spectra, steady and time-resolved fluorescence emission spectra, and photocurrent responses were carried out, aiming to reveal the determinative factor for the improved visible-light response. Our results indicate that the increased photoactivity originates from the enhanced charge-transfer effect due to the intimate interactions between g-C3N4 and conjugated CNT. The presence of CNT in the hybrids is beneficial for improving electron-hole separation on the excited g-C3N4 by prolonging the lifetimes of charge carriers and improving the population distribution of short-lived and long-lived charge carriers.
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Cites
Cui, Y., Ding, Z., Liu, P., Antonietti, M., Fu, X., & Wang, X. (2012) · Phys. Chem. Chem. Phys. · doi:10.1039/c1cp22820j · Cited by 585
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
g‐C3N4‐Based Heterostructured Photocatalysts
Fu, J., Yu, J., Jiang, C., & Cheng, B. (2018) · Advanced Energy Materials · doi:10.1002/aenm.201701503 · Cited by 2,565
Liao, G., Gong, Y., Zhang, L., Gao, H., Yang, G.-J., & Fang, B. (2019) · Energy & Environmental Science · doi:10.1039/c9ee00717b · Cited by 1,075
Metal-free photocatalysts for hydrogen evolution
Rahman, M. Z., Kibria, M. G., & Mullins, C. B. (2020) · Chemical Society Reviews · doi:10.1039/c9cs00313d · Cited by 565
Sudhaik, A., Raizada, P., Shandilya, P., Jeong, D.-Y., Lim, J.-H., & Singh, P. (2018) · Journal of Industrial and Engineering Chemistry · doi:10.1016/j.jiec.2018.07.007 · Cited by 408
Metadata
- Authors
- Chen, Y., Li, J., Hong, Z., Shen, B., Lin, B., & Gao, B.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 16
- Issue
- 17
- Pages
- 8106
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W2032928853
- Cited by
- 182
- References
- 1
- FWCI
- 5.89
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chen, Y., Li, J., Hong, Z., Shen, B., Lin, B., & Gao, B. (2014). Origin of the enhanced visible-light photocatalytic activity of CNT modified g-C3N4 for H2 production. Physical Chemistry Chemical Physics. https://doi.org/10.1039/c3cp55191a
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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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