Photodegradation of Gaseous Toluene by the CdS/TiO2/ACFs Composites under Daylight Irradiation

Wen Xia Zhao; Bin Guo; Ai Ling Ren

doi:10.4028/www.scientific.net/AMR.197-198.837

Paper Titles

Preparation and Characterization of Bimetal and Nitrogen Co-Modified Titanium with Visible-Light Activity
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Design and Optimization by Design-Expert Software for Carbon Cycle Mico-Electrolysis Reactor Treatment of the Phenol Wastewater
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Formation of Ketoacids in Filtered River Water with Synthetic Goethite-catalyzed Ozonation
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Effects of Activators on Compressive Strength of Fly Ash-Based Geopolymers
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Photodegradation of Gaseous Toluene by the CdS/TiO₂/ACFs Composites under Daylight Irradiation
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Study on Style of Multi-Component Bamboo Blended Knitted Fabric
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Hydrothermal Synthesis and Characterization of Phosphor Doped Tetragonal Zirconia Nanocrystallites
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Post-Doping of ZnO with Cu and its Effect on their Photocatalytic Production of Active Oxygen Species
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The Preparation of the Magnetically Separated Cu Doped TiO₂ by Coating-Calcining Method
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Photodegradation of Gaseous Toluene by the CdS/TiO₂/ACFs Composites under Daylight Irradiation

Abstract:

To improve the photocatalytic application performances of TiO₂, in this work, firstly CdS modified Degussa P25 TiO₂ (CdS/TiO₂) composites were prepared, then they were loaded on activated carbon fibers(ACFs) by dip-coating method. The composites were characterized by XRD, UV-vis, SEM, EDS and BET. Their photocatalytic activities under daylight were investigated by the degradation of gaseous toluene. The results showed that CdS/TiO₂ composites mainly composed of anatase TiO₂ and little CdS phases; CdS/TiO₂ absorption edge had a pronounced “red shift”, the corresponding absorption edge wavelength of CdS/TiO₂ composites were extended to 740 nm, respectively. From EDS spectrum, the main elements of CdS/TiO₂/ACFs were Ti and O and a small quantities of S and Cd. CdS/TiO₂ loaded on ACFs was in the form of small clusters, but not very uniform; compared with original ACFs, the surface area and pore volume of CdS/TiO₂/ACFs decreased slightly, while the average size remained unchanged. The photodegradation rate of toluene by CdS/TiO₂/ACFs composites under daylight irradiation was markedly higher than that by TiO₂/ACFs, the maximal increasing rate reached as high as 18%.