Photodegradation Characterizations of Gaseous Dichloromethane by the CdS/TiO2/ACFs Composites

Wen Xia Zhao; Yan Jing Zhang; Er Hong Duan

doi:10.4028/www.scientific.net/AMR.926-930.178

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 926-930Photodegradation Characterizations of Gaseous...

Photodegradation Characterizations of Gaseous Dichloromethane by the CdS/TiO₂/ACFs Composites

Abstract:

Dichloromethane (CH2Cl2) is one of main components of odorous gases from pharmaceutical sewage treatment plants. In this work, firstly the CdS/TiO2 loaded on ACFs composite photocatalysts was prepared. Gaseous CH2Cl2 was selected as the model reactant, the photocatalytic activities of CdS/TiO2/ACFs composites had been investigated. The results showed that the degradation rate of CH2Cl2, when the light was turned on after the CdS/TiO2/ACFs composites were saturated, was significantly higher and could maintain a longer time than that one of direct light. At initial stage, the degradation rate of CH2Cl2 could reach to 94%, while it decreased with the increase of the irradiation distance. It increased with the amount of composites before illumination 70 min; however it becomes reverse after 70 min. The degradation rate of CH2Cl2 decreases with the inlet concentration, when the inlet concentration was 26.5 mg m-3, the photodegradation rate declined about 70 % than that one of 8.5 mg m-3 when light 30 min.

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Periodical:

Advanced Materials Research (Volumes 926-930)

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178-181

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.926-930.178

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Online since:

May 2014

Authors:

Wen Xia Zhao*, Yan Jing Zhang, Er Hong Duan

Keywords:

ACFs, CdS, CH2Cl2, Characterization, Photocatalysis, TiO₂

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