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Author Huo, Rui ♦ Yang, Jing-Yu ♦ Liu, You-Qin ♦ Liu, Hai-Feng ♦ Li, Xin ♦ Xu, Yue-Hua
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CHARGE CARRIERS ♦ HOLES ♦ IRRADIATION ♦ NANOPARTICLES ♦ PHOTOCATALYSIS ♦ PRECIPITATION ♦ RECOMBINATION ♦ SEMICONDUCTOR MATERIALS ♦ SPECTRAL REFLECTANCE ♦ TITANIUM OXIDES ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ TUNGSTEN ♦ ULTRAVIOLET RADIATION ♦ VISIBLE RADIATION ♦ X-RAY DIFFRACTION ♦ X-RAY PHOTOELECTRON SPECTROSCOPY
Abstract Highlights: • W, N, S codoped TiO{sub 2} 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)-TiO{sub 2} is 10 times higher than that of TiO{sub 2}. • The doping enhanced visible light absorbance and accelerated the charge carrier separation. - Abstract: In this work, the preparation and physiochemical characterization of tungsten, nitrogen and sulfur codoping TiO{sub 2} photocatalysts (W, N, S-TiO{sub 2}) was undertaken. W, N, S-TiO{sub 2} nanoparticles were synthesized via the precipitation-impregnation method. To investigate the structural, optical, and electronic properties, the as-prepared W, N, S-TiO{sub 2} 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-TiO{sub 2} samples showed photo-absorption in the visible light region and higher visible light photocatalytic activity than TiO{sub 2}. 0.011W, 0.030(N, S)-TiO{sub 2} exhibited the highest visible light photocatalytic activity, and the photocatalyic degradation activity of 0.011W,0.030(N,S)-TiO{sub 2} is nearly 10 times higher than that of TiO{sub 2}. Compared with the undoped TiO{sub 2}, the improved photocatalytic activity of W, N, S-TiO{sub 2} samples under visible light irradiation is attributed to the increase of the visible light absorption and the reduction in photogenerated electron-hole recombination.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 76


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