Abstract
Diluted Sn doped TiO2 nanocrystals (Sn/Ti ratio: x ≤ 1.37 %) were synthesized by a simple hydrothermal method using pure reagents without any surfactant and dispersant material. The XRD of these samples showed an anatase phase, anatase and rutile mixed phases, and a rutile phase of TiO2 and SnO2 with the increase of Sn dopant concentrations. 119Sn Mössbauer spectra gave the broad peaks, which were decomposed into doublets and sextets because almost all these samples showed magnetic hysteresis even at room temperature. The titanium oxides doped with x ≤ 0.12 % showed the relatively large magnetic hysteresis and high photocatalytic activity. Mössbauer spectra of samples doped with x > 0.3 % were analyzed by one doublet and two sextets although the samples showed weak ferromagnetism. Three kinds of Sn species may be distinguished as Sn 4+ substituted TiO2 and two different magnetic arrangements of Sn doped TiO2: one with more oxygen defects and other at the interface of TiO2 and precipitated SnO2 containing Ti atoms. The correlation between various amounts of Sn sites and photocatalytic activity and/ or magnetic property was discussed.
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References
Li, X., **ong, R.C., Wei, G.: Preparation and photocatalytic activity of nanoglued Sn-doped TiO2. J. Hazard. Mater. 164, 587–591 (2009)
Jiang, H., **ng, J., Chen, Z., Tian, F., Cuan, Q., Gong, X., Yang, H.: Enhancing photocatalytic activity of Sn doped TiO2 dominated with {1 0 5}facets. Catal. Today 225, 18–23 (2014)
**g, L., Fu, H., Wang, B., Wang, D., **n, B., Li, S., Sun, J.: Effects of Sn dopant on the photoinduced charge property and photocatalytic activity of TiO2 nanoparticles. Appl. Catal. B 62, 282–291 (2006)
Li, J., Zeng, H.C.: Hollowing Sn-doped TiO2 nanospheres via Ostwald ripening. J. Am. Chem. Soc. 129, 15839–15847 (2007)
Ganeshraja, A.S., Clara, A.S., Rajkumar, K., Wang, Y.J., Wang, Y., Wang, J., Anbalagan, K.: Simple hydrothermal synthesis of metal oxides coupled nanocomposites: structural, optical, magnetic and photocatalyticstudies. Appl. Surf. Sci. 353, 553–563 (2015)
Ganeshraja, A.S., Thirumurugan, S., Rajkumar, K., Zhu, K., Wang, J., Anbalagan, K.: Effects of structural, optical and ferromagnetic states on the photocatalytic activities of Sn–TiO2 nanocrystals. RSC Adv. 6, 409–421 (2016)
Wang, C., Shao, C., Zhang, X., Liu, Y.: SnO2 nanostructures-TiO2 nanofibers heterostructures: controlled fabrication and high photocatalytic properties. Inorg. Chem. 48, 7261–7268 (2009)
Fabritchnyi, P.B., Korolenko, M.V., Afanasov, M.I., Danot, M., Janod, E.: Mössbauer characterization of tin dopant ions in the antiferromagnetic ilmenite MnTiO3. Solid State Commun. 125, 341–346 (2003)
Nomura, K.: Magnetic properties and oxygen defects of dilute metal doped tin oxide based. Croat. Chem. Acta 88, 579–590 (2015)
Pan, L., Zou, J.-J., Zhang, X., Wang, L.: Water-mediated promotion of dye sensitization of TiO2 under visible light. J. Am. Chem. Soc. 133, 10000–10002 (2011)
Sun, J., Wang, X.L., Sun, J.Y., Sun, R.X., Sun, S.P., Qiao, L.P.: Photocatalytic degradation and kinetics of Orange G using nano-sized Sn(IV)/TiO2/AC photocatalyst. J. Mol. Catal. A 260, 241–246 (2006)
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This article is part of the Topical Collection on Proceedings of the 2nd Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2016), Cavtat, Croatia, 31 May–3 June 2016
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Ganeshraja, A.S., Nomura, K. & Wang, J. 119Sn Mössbauer studies on ferromagnetic and photocatalytic Sn–TiO2 nanocrystals. Hyperfine Interact 237, 139 (2016). https://doi.org/10.1007/s10751-016-1354-x
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DOI: https://doi.org/10.1007/s10751-016-1354-x