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Hyperfine Interactions

, 237:139 | Cite as

119Sn Mössbauer studies on ferromagnetic and photocatalytic Sn–TiO2 nanocrystals

  • Ayyakannu Sundaram Ganeshraja
  • Kiyoshi Nomura
  • Junhu Wang
Article
Part of the following topical collections:
  1. Proceedings of the 2nd Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2016), Cavtat, Croatia, 31 May-3 June 2016

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.

Keywords

Sn-TiO2 119Sn Mössbauer study Ferromagnetic Photocatalyst Rhodamine B 

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Ayyakannu Sundaram Ganeshraja
    • 1
  • Kiyoshi Nomura
    • 2
  • Junhu Wang
    • 1
  1. 1.Mössbauer Effect Data CenterDalian Institute of Chemical Physics, Chinese Academy of ScienceDalianChina
  2. 2.Photocatalysis International Research CenterTokyo University of ScienceYamazakiJapan

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