Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye
Stan, George E.
Mihailescu, Ion N.
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We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F-SnO2 (FTO) glass. Annealing was carried out at 500 degrees C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO(2 )nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes' surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was eff...icient in the degradation of methyl orange dye under visible light.
Source:Journal of Physics and Chemistry of Solids, 2020, 147
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- CERIC-ERIC 
- Structure Fund Project [CZ.02.1.01/0.0/0.0/16_013/0001788]
- UEFISCDI [304/2011]
- info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS// (RS-45019)
- info:eu-repo/grantAgreement/MESTD/inst-2020/200287/RS// (RS-200287)
- info:eu-repo/grantAgreement/MESTD/inst-2020/200135/RS// (RS-200135)
- This is the peer-reviewed version of the following article: Bjelajac, A.; Petrović, R.; Vujančević, J.; Veltruska, K.; Matolin, V.; Siketić, Z.; Provatas, G.; Jakšić, M.; Stan, G. E.; Socol, G.; Mihailescu, I. N.; Janaćković, Đ. Sn-Doped TiO2 Nanotubular Thin Film for Photocatalytic Degradation of Methyl Orange Dye. Journal of Physics and Chemistry of Solids 2020, 147. https://doi.org/10.1016/j.jpcs.2020.109609