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- W2004207369 abstract "Abstract F–N–W-codoped TiO 2 nanoparticles were successfully prepared by a sol–gel-mixing method without hydrothermal or calcining treatment. Effects of the F, N and W ion dosage concentration on crystallinity, morphology, grain size and chemical status of TiO 2 were investigated. The results showed that the appearance of F–N–W-codoped TiO 2 powders was uniformly spheroidal nanoparticles, whose average particle size was about 7 nm. The F–N–W-codoped TiO 2 nanoparticles owned high catalytic activity under visible light irradiation and low-temperature thermo-oxidation activity in the dark. The highest degradation rate of Rhodamine B dye was obtained by TiO 2 powders modified with 0.5 at.% W (N/W = 6/7) and 4.0 at.% F. Even in the dark, the degradation rate increased with the increasing of temperature. It was as high as 92% when the mixing liquid was kept at 60 °C for 2 h. The high catalytic activity of the F–N–W-codoped TiO 2 might result from larger specific surface area and high surface acidity because of surface F ions, the band gap narrowing caused by W x Ti 1− x O 2 or O–Ti–N, as well as lower recombination rate of charge carriers because of valence variation of W ions (W 6+ → W 5+ ) in the forbidden band." @default.
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- W2004207369 date "2012-08-01" @default.
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- W2004207369 title "Dual-responsive F–N–W-codoped TiO2 nanoparticles with strong visible light response and low-temperature thermo-oxidation activity" @default.
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- W2004207369 doi "https://doi.org/10.1016/j.matchemphys.2012.05.064" @default.
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