TiO2/NaY Composite as Photocatalyst for Degradation of Omethoate

Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (4): 543-549.

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TiO₂/NaY Composite as Photocatalyst for Degradation of Omethoate

ZHAO Di-shun^1,3*, WANG Jia-lei¹, ZHAO Xue-heng² and ZHANG Juan³

1. School of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, P. R. China;
2. Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229, USA;
3. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

Received:2008-09-24 Revised:2009-01-05 Online:2009-07-25 Published:2009-10-16
Contact: ZHAO Di-shun. E-mail: dishunzhao@yahoo.com.cn
Supported by:
Supported by the Natural Science Foundation of Hebei Province, China(No.203364).

Abstract

Abstract:

Photocatalytic activities of TiO₂ and NaY zeolites-supported TiO₂ were investigated with omethoate as a model pollutant. The physical and chemical states of NaY zeolite-supported TiO₂ were evaluated via XRD, FTIR, BET and SEM. Photodegradation of omethoate was studied with H₂O₂ as oxidant and TiO₂ supported on NaY zeolite as photocatalyst. Parameters involved in the photo-catalysis of omethoate, i.e., the calcination temperature of the photocatalyst, initial omethoate concentration, the amount of TiO₂ loaded on NaY zeolite, photocatalyst dosage and H₂O₂ concentration were investigated in detail. The results show that TiO₂/NaY zeolite prepared by means of sol-gel method exhibited a good photocatalytic activity for the degradation of omethoate. Optimum conditions included the calcination temperature of photocatalyst 550 °C, initial omethoate concentration 500 mg/L, the amount of TiO₂ loaded on NaY zeolite 35%(mass fraction), the amount of photocatalyst 5 g/L, H₂O₂ concentration 30 mL/L and an irradiation time of 180 min. The removal of omethoate was up to 93%. Kinetics parameters of the photocatalytic degradation of omethoate were measured and calculated. The result shows the kinetics of photocatalytic degradation of omethoate is first-order.

Key words: TiO₂; NaY zeolite; Photocatalytic degradation; Omethoate

ZHAO Di-shun*, WANG Jia-lei, ZHAO Xue-heng and ZHANG Juan. TiO₂/NaY Composite as Photocatalyst for Degradation of Omethoate[J]. Chemical Research in Chinese Universities, 2009, 25(4): 543-549.

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TiO₂/NaY Composite as Photocatalyst for Degradation of Omethoate

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