Preparation of Sn doped nanometric TiO2 powders by reflux and hydrothermal syntheses and their characterization


KİRAZ N., Burunkaya E., KESMEZ Ö., ÇAMURLU H. E. , Asilturk M., Yesil Z., ...Daha Fazla

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, cilt.59, ss.381-386, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 59 Konu: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1007/s10971-011-2515-7
  • Dergi Adı: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.381-386

Özet

Hydrothermal and reflux synthesis methods were utilized for the preparation of 5% Sn doped TiO2 nanopowders. Obtained powders were subjected to particle size and specific surface area measurements, flame atomic absorption spectroscopy, X-ray diffraction analyses and transmission electron microscopy examination. TiO2 powder prepared by hydrothermal synthesis presented a bimodal particle size distribution with average particle sizes of about 3 and 10 nm, whereas TiO2 powder synthesized by reflux method had an average particle size of 7 nm. Specific surface areas of hydrothermal and reflux synthesized TiO2 were 130 and 115 m(2)/g, respectively. Sn doping in TiO2 was 95.8% in hydrothermal and 86.4% in reflux synthesis as measured by FAAS, respectively. Photocatalytic activities of the obtained TiO2 powders were evaluated by decomposition of malachite green solution in a solar box. Photocatalytic activity of hydrothermally synthesized TiO2 was fairly higher in visible light and slightly higher in UV light than the activity of reflux synthesized TiO2.