Fabrication and Characterization of Tailored TiO2 and WO3/MWCNT Composites for Methylene Blue Decomposition

doi:10.1016/S1872-2067(10)60208-2

摘要/Abstract

摘要： A sol-gel method was used to prepare WO₃/MWCNT-TiO₂ composites. Their photocatalytic activities were evaluated by the degradation of methylene blue (MB) solution under UV light. The catalysts were characterized by X-ray diffraction, specific surface area measurement, energy-dispersive X-ray analysis, transmission and scanning electron microscopy. Aqueous MB solutions of 100 ml were photodegraded by a small amount of the WO₃/MWCNT-TiO₂ composite under UV light irradiation. The photocatalytic data showed that the WO₃/MWCNT-TiO₂ composite achieved a high rate of MB photodegradation. This was attributed to the use of MWCNT which can absorb UV light to create photo-induced electrons, strong adsorption of dye molecules on the photocatalyst, and reduced recombination rate of electron-holes in the WO₃/MWCNT-TiO₂ composite due to the introduction of the WO₃semiconductor.

关键词: tungsten trioxide, titanium dioxide, multi-walled carbon nanotube, photocatalytic activity, methylene blue

Abstract: A sol-gel method was used to prepare WO₃/MWCNT-TiO₂ composites. Their photocatalytic activities were evaluated by the degradation of methylene blue (MB) solution under UV light. The catalysts were characterized by X-ray diffraction, specific surface area measurement, energy-dispersive X-ray analysis, transmission and scanning electron microscopy. Aqueous MB solutions of 100 ml were photodegraded by a small amount of the WO₃/MWCNT-TiO₂ composite under UV light irradiation. The photocatalytic data showed that the WO₃/MWCNT-TiO₂ composite achieved a high rate of MB photodegradation. This was attributed to the use of MWCNT which can absorb UV light to create photo-induced electrons, strong adsorption of dye molecules on the photocatalyst, and reduced recombination rate of electron-holes in the WO₃/MWCNT-TiO₂ composite due to the introduction of the WO₃semiconductor.

Key words: tungsten trioxide, titanium dioxide, multi-walled carbon nanotube, photocatalytic activity, methylene blue

ZHU Lei, MENG Zeda, OH WonChun. Fabrication and Characterization of Tailored TiO₂ and WO₃/MWCNT Composites for Methylene Blue Decomposition[J]. 催化学报, 2011, 32(6): 926-932.

ZHU Lei, MENG Zeda, OH WonChun. Fabrication and Characterization of Tailored TiO₂ and WO₃/MWCNT Composites for Methylene Blue Decomposition[J]. Chinese Journal of Catalysis, 2011, 32(6): 926-932.

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Fabrication and Characterization of Tailored TiO₂ and WO₃/MWCNT Composites for Methylene Blue Decomposition

Fabrication and Characterization of Tailored TiO₂ and WO₃/MWCNT Composites for Methylene Blue Decomposition

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