The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Understanding the effect of surface/bulk defects on the photocatalytic activity of TiO2: anatase versus rutile
Abstract
The sole effect of surface/bulk defects of TiO2 samples on their photocatalytic activity was investigated. Nano-sized anatase and rutile TiO2 were prepared by hydrothermal method and their surface/bulk defects were adjusted simply by calcination at different temperatures, i.e. 400-700 °C. High temperature calcinations induced the growth of crystalline sizes and a decrease in the surface areas, while the crystalline phase and the exposed facets were kept unchanged during calcination, as indicated by the characterization results from XRD, Raman, nitrogen adsorption-desorption, TEM and UV-Vis spectra. The existence of surface/bulk defects in calcined TiO2 samples was confirmed by photoluminescence and XPS spectra, and the surface/bulk defect ratio was quantitatively analyzed according to positron annihilation results. The photocatalytic activity of calcined TiO2 samples was evaluated in the photocatalytic reforming of methanol and the photocatalytic oxidation of α-phenethyl alcohol. Based on the characterization and catalytic results, a direct correlation between the surface specific photocatalytic activity and the surface/bulk defect density ratio could be drawn for both anatase TiO2 and rutile TiO2. The surface defects of TiO2, i.e. oxygen vacancy clusters, could promote the separation of electron-hole pairs under irradiation, and therefore, enhance the activity during photocatalytic reaction.
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Citations
Cites
Electrochemical Photolysis of Water at a Semiconductor Electrode
FUJISHIMA, A., & HONDA, K. (1972) · Nature · doi:10.1038/238037a0 · Cited by 34,169
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
Raman spectrum of anatase, TiO 2
Ohsaka, T., Izumi, F., & Fujiki, Y. (1978) · Journal of Raman Spectroscopy · doi:10.1002/jrs.1250070606 · Cited by 2,327
Cited by
Li, L., Yan, J., Wang, T., Zhao, Z.-J., Zhang, J., Gong, J., & Guan, N. (2015) · Nature Communications · doi:10.1038/ncomms6881 · Cited by 847
Self-citationWang, S., Pan, L., Song, J.-J., Mi, W., Zou, J.-J., Wang, L., & Zhang, X. (2015) · Journal of the American Chemical Society · doi:10.1021/ja512047k · Cited by 718
Wang, J., Li, J., Jiang, C., Zhou, P., Zhang, P., & Yu, J. (2017) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2016.11.036 · Cited by 485
Yan, J., Wu, H., Chen, H., Zhang, Y., Zhang, F., & Liu, S. F. (2016) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2016.03.026 · Cited by 406
Self-citationBlack TiO2: A review of its properties and conflicting trends
Rajaraman, T. S., Parikh, S. P., & Gandhi, V. G. (2020) · Chemical Engineering Journal · doi:10.1016/j.cej.2019.123918 · Cited by 323
Metadata
- Authors
- Yan, J., Wu, G., Guan, N., Li, L., Li, Z., & Cao, X.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2013
- Volume
- 15
- Issue
- 26
- Pages
- 10978
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W1988337077
- Cited by
- 684
- References
- 3
- FWCI
- 17.31
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yan, J., Wu, G., Guan, N., Li, L., Li, Z., & Cao, X. (2013). Understanding the effect of surface/bulk defects on the photocatalytic activity of TiO2: anatase versus rutile. Physical Chemistry Chemical Physics. https://doi.org/10.1039/c3cp50927c
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