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Photo-catalytic degradation of dimethyl disulfide on S and metal-ions co-doped TiO2 under visible-light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40171 45845 2014 8 PDF Available
Title
Photo-catalytic degradation of dimethyl disulfide on S and metal-ions co-doped TiO2 under visible-light irradiation
Abstract

•V4+, Fe3+, and S6+ are successfully doped into the lattice of TiO2.•Dopants lead to the formation of impurity level in the semiconductor.•Zn2+ is adsorbed on the surface of TiO2 to form ZnO/TiO2 compound semiconductor.•Several possible mechanisms have been developed for co-doped TiO2 catalysts.

The sulfur and transition metal co-doped TiO2 catalysts were prepared by a sol–gel method. The physical and chemical properties of these photo-catalysts were characterized by thermo-gravimetric/differential-thermal analysis, X-ray diffraction, X-ray photoelectron spectroscopy, UV–vis, and Fourier transform-infrared spectroscopy. Compared to pure TiO2 and S/TiO2, sulfur and transition metal co-doped TiO2 catalysts have smaller crystal size and shift to visible-light absorption region. The XPS spectra confirm that V4+, Fe3+, and S6+ are successfully doped into the lattice of TiO2, but Zn2+ is adsorbed on the surface of TiO2. S0.05Zn0.001/TiO2 shows the best photocatalytic activity and S-VOCs tolerance for the degradation of dimethyl disulfide under visible irradiation. Several possible mechanisms have been developed for co-doped TiO2 under visible-light in this study.

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Keywords
Dimethyl disulfide (DMDS); Titanium dioxide (TiO2); Visible light; Co-doped TiO2
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Photo-catalytic degradation of dimethyl disulfide on S and metal-ions co-doped TiO2 under visible-light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 469, 17 January 2014, Pages 221–228
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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