Photodegradation of p-Nitrophenol Catalyzed by ZnO/MWCNTs Composite Catalyst in Water

Zhe Qi Li; Jing Yu Liu

doi:10.4028/www.scientific.net/AMR.455-456.1339

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 455-456Photodegradation of p-Nitrophenol Catalyzed by...

Photodegradation of p-Nitrophenol Catalyzed by ZnO/MWCNTs Composite Catalyst in Water

Abstract:

Photodegradation of p-nitrophenol catalyzed by ZnO/MWCNTs composite in water was investigated. The effects of pH, irradiation time, catalyst loading, initial substrate concentration and MWCNTs content on the degradation were investigated. Experiment results revealed that the optimal conditions were a p-nitrophenol concentration of 60.0 mg/L at pH 5.0 with catalyst loading of 10.0 g/L under solar irradiation for the illumination of 180 min. The highest efficiency on photodegradation of p-nitrophenol can be achieved with an optimal MWCNTs/ZnO mass ratio of 0.16%. Possible decomposing mechanisms were also discussed. The repeatability of photocatalytic activity was tested. The photocatalyst was used ten cycles with degradation efficiency still higher than 95%. The results of the study showed the feasible and potential use of ZnO/MWCNTs composite in degradation of toxic organic pollutants.

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Periodical:

Advanced Materials Research (Volumes 455-456)

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1339-1344

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.455-456.1339

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Online since:

January 2012

Authors:

Zhe Qi Li, Jing Yu Liu

Keywords:

Photocatalyst, Photodegradation, p-Nitrophenol, Wastewater, ZnO/MWCNTs Composite

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