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Vol. 25 No. 10 (2013): Vol 25 Issue 10

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Performance of C,N-Impregnated Photocatalyst Coupled with Continuous-Flow Reactor for Removal of Gaseous Aromatic Pollutants

https://doi.org/10.14233/ajchem.2013.OH97
Wan-Kuen Jo
Department of Environmental Engineering, Kyungpook National University, 80 University Road, Bukgu, Daegu 702-701, Republic of Korea
Hyun-Jung Kang
Department of Environmental Engineering, Kyungpook National University, 80 University Road, Bukgu, Daegu 702-701, Republic of Korea

Corresponding Author(s) : Wan-Kuen Jo

wkjo@knu.ac.kr

Asian Journal of Chemistry, Vol. 25 No. 10 (2013): Vol 25 Issue 10

Abstract

Previous activity tests of carbon and nitrogen co-impregnated photocatalysts (C and N-impregnated-TiO2) for environmental pollution controls were primarily performed in the aqueous phase to investigate the decomposition of water pollutants. This study examined the photocatalytic activities of C,N-TiO2 photocatalysts for the purification of indoor-level gaseous organic compounds under different experimental conditions. The as-prepared C,N-TiO2 and unmodified TiO2 powders were characterized using XRD, SEM, diffuse reflectance UV-VIS-NIR spectra and Fourier transform infrared spectra. The C,N-TiO2 powders exhibited a shift in the absorbance spectrum towards the visible light region when compared to TiO2 powders, indicating that the as-prepared C,N-TiO2 photocatalyst could be effectively activated by visible-light irradiation. The surface characteristics of the two types of photocatalysts differed. Additionally, the average photocatalytic degradation efficiencies for benzene, toluene, ethyl benzene and xylene (BTEX) obtained from the C,N-TiO2 system were 27, 81, 95 and 99 %, respectively, whereas those of the TiO2 powders were close to zero, 19, 47 and 56 %, respectively. Under the experimental conditions used in this study, the photocatalytic degradation efficiencies for BTEX were higher for the photocatalytic system with the fluorescent lamp than for that with light-emitting diodes.

Keywords

Degradation efficiency Operational condition Aromatic pollutant Light-emitting diode
Jo, W.-K., & Kang, H.-J. (2013). Performance of C,N-Impregnated Photocatalyst Coupled with Continuous-Flow Reactor for Removal of Gaseous Aromatic Pollutants. Asian Journal of Chemistry, 25(10), 5805–5810. https://doi.org/10.14233/ajchem.2013.OH97
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