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Heterojunctions in g-C3N4/TiO2(B) nanofibres with exposed (001) plane and enhanced visible-light photoactivity
Open accessAbstract
The formation of heterojunctions is an efficient strategy to extend the light response range of TiO2-based catalysts to the visible light region. In addition to the bandgap edge match between the narrow bandgap semiconductors and the TiO2 substrate, a stable phase interface between the sensitiser and TiO2 is crucial for the construction of heterojunctions, since it acts as a tunnel for the efficient transfer of photogenerated charges. Herein, the coincidence site density (1/Σ) of graphite-like carbon nitride (g-C3N4) nanoflakes and two types of TiO2 nanofibres [anatase and TiO2(B)] was calculated by near coincidence site lattice (NCSL) theory. It was found that the coincidence site density of g-C3N4 and TiO2(B) nanofibre with an exposed (001) plane is 3 times of that of the g-C3N4 and anatase nanofibre with exposed (100) plane. This indicated that the g-C3N4 nanoflakes are more favoured to form stable heterojunctions with TiO2(B) nanofibres. As expected, a stable phase interface was formed between the plane of (22–40) of g-C3N4 and the plane (110) of TiO2(B) which had same d-spacing of 0.35 nm and the same orientation. Under visible light irradiation, the photogenerated electrons could efficiently migrate to the TiO2(B) nanofibres from the g-C3N4 through the heterojunctions. So the g-C3N4/TiO2(B) system exhibited better photodegradation ability for sulforhodamine B (SRB) dye than the g-C3N4/anatase system, although the photoactivity of the anatase nanofibres was much better than that of the TiO2(B) nanofibres.
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Cites
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
Surface Science Studies of the Photoactivation of TiO 2 New Photochemical Processes
Thompson, T. L., & Yates, J. T. (2006) · Chemical Reviews · doi:10.1021/cr050172k · Cited by 2,064
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
Mamba, G., & Mishra, A. K. (2016) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2016.05.052 · Cited by 1,233
Hybrid nanostructures based on titanium dioxide for enhanced photocatalysis
Reddy, K. R., Hassan, M., & Gomes, V. G. (2015) · Applied Catalysis A: General · doi:10.1016/j.apcata.2014.10.001 · Cited by 696
Hao, R., Wang, G., Tang, H., Sun, L., Xu, C., & Han, D. (2016) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2016.01.026 · Cited by 668
Tong, Z., Yang, D., Xiao, T., Tian, Y., & Jiang, Z. (2015) · Chemical Engineering Journal · doi:10.1016/j.cej.2014.08.072 · Cited by 438
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Metadata
- Authors
- Zhang, L., Jing, D., She, X., Liu, H., Yang, D., Lu, Y., Li, J., Zheng, Z., & Guo, L.
- Venue
- J. Mater. Chem. A
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014
- Volume
- 2
- Issue
- 7
- Pages
- 2071-2078
- ISSN
- 2050-7488 (ISSN-L)
- 2050-7496
- OpenAlex
- W2122024163
- Cited by
- 242
- References
- 2
- FWCI
- 11.42
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Zhang, L., Jing, D., She, X., Liu, H., Yang, D., Lu, Y., Li, J., Zheng, Z., & Guo, L. (2014). Heterojunctions in g-C3N4/TiO2(B) nanofibres with exposed (001) plane and enhanced visible-light photoactivity. J. Mater. Chem. A. https://doi.org/10.1039/c3ta14047d
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