کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1487363 | 1510699 | 2016 | 7 صفحه PDF | دانلود رایگان |
• W, N, S codoped TiO2 nanoparticles were synthesized by precipitation-impregnation method.
• New linkages N–Ti–O, Ti–O–S and Ti–O–W were formed.
• The activity of 0.011W, 0.030(N,S)-TiO2 is 10 times higher than that of TiO2.
• The doping enhanced visible light absorbance and accelerated the charge carrier separation.
In this work, the preparation and physiochemical characterization of tungsten, nitrogen and sulfur codoping TiO2 photocatalysts (W, N, S-TiO2) was undertaken. W, N, S-TiO2 nanoparticles were synthesized via the precipitation-impregnation method. To investigate the structural, optical, and electronic properties, the as-prepared W, N, S-TiO2 photocatalysts were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflection spectrum (DRS). W, N, S-TiO2 samples showed photo-absorption in the visible light region and higher visible light photocatalytic activity than TiO2. 0.011W, 0.030(N, S)-TiO2 exhibited the highest visible light photocatalytic activity, and the photocatalyic degradation activity of 0.011W,0.030(N,S)-TiO2 is nearly 10 times higher than that of TiO2. Compared with the undoped TiO2, the improved photocatalytic activity of W, N, S-TiO2 samples under visible light irradiation is attributed to the increase of the visible light absorption and the reduction in photogenerated electron-hole recombination.
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Journal: Materials Research Bulletin - Volume 76, April 2016, Pages 72–78