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

Abstract:

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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%.

Info:

Periodical:

Advanced Materials Research (Volumes 197-198)

Edited by:

Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng

Pages:

837-840

DOI:

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

Citation:

W. X. Zhao et al., "Photodegradation of Gaseous Toluene by the CdS/TiO2/ACFs Composites under Daylight Irradiation", Advanced Materials Research, Vols. 197-198, pp. 837-840, 2011

Online since:

February 2011

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Price:

$35.00

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