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Enhancement of tributyltin degradation under natural light by N-doped TiO2 photocatalyst

Bangkedphol, Sornnarin and Keenan, Helen and Davidson, Christine and Sakultantimetha, Arthit and Sirisaksoontorn, W and Songsasen, A. (2010) Enhancement of tributyltin degradation under natural light by N-doped TiO2 photocatalyst. Journal of Hazardous Materials, 184 (1-3). pp. 533-537. ISSN 0304-3894

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Abstract

Photo-degradation of tributyltin (TBT) has been enhanced by TiO(2) nanoparticles doped with nitrogen (N-doped TiO(2)). The N-doped catalyst was prepared by a sol-gel reaction of titanium (IV) tetraisopropoxide with 25% ammonia solution and calcined at various temperatures from 300 to 600°C. X-ray diffraction results showed that N-doped TiO(2) remained amorphous at 300°C. At 400°C the anatase phase occurred then transformed to the rutile phase at 600°C. The crystallite size calculated from Scherrer's equation was in the range of 16-51 nm which depended on the calcination temperature. N-doped TiO(2) calcined at 400°C which contained 0.054% nitrogen, demonstrated the highest photocatalytic degradation of TBT at 28% in 3h under natural light when compared with undoped TiO(2) and commercial photocatalyst, P25-TiO(2) which gave 14.8 and 18% conversion, respectively.