Photocatalytic activity of tin-substituted TiO2 in visible light

The nature of paramagnetic defects in tin (IV) oxide

“…Furthermore, we have observed a maximum intensity of the D signal in the samples with yellow color, which is typically associated with Sn 2+ ? Sn 4+ charge transitions [19,20]. Generally, we can conclude that the D signal was observed in the EPR spectra of the SnO 2 samples, which were synthesized and treated under conditions favorable for the formation of Sn 2+ ions in tin dioxide structure.…”

“…The yellow color of tin dioxide is usually associated with Sn 2+ ? Sn 4+ electronic transitions (absorption line at 380 nm) [19,20]. The oxygen vacancies can absorb light Table 1 Synthesis conditions, phase composition, particle size and parameters of the EPR spectra for the SnO 2 samples obtained by different routes.…”

Photocatalytic degradation of methyl orange with W-doped TiO2 synthesized by a hydrothermal method

“…To improve photocatalytic activity of TiO 2 for wide range applications, several approaches [5][6][7] have been developed, including doping techniques, and nanosized process of enhancing the specific surface area of catalysts. Coupling of different kinds of semiconductor photocatalysts is a promising way and can enhance photocatalytic response to visible light by increasing the charge separation and extending wavelength for photoexcitation, so that the photocatalytic efficiency for liquid and gas phase reactions was increased [8,9].…”

Photoconductivity of TiO2 films deposited by PECVD

“…TiO 2 photocatalysts doped with transition metals such as Cr, Mn, Co, Fe, etc. have been found to absorb visible light [7][8][9][10][11][12][13]. Matsumoto et al [7] have shown that Co-doped polycrystalline TiO 2 electrodes prepared at 673 ÷ 823 K show an apparent visible light response 420 ÷ 550 nm.…”