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An easy and efficient use of TiO2 supported HZSM-5 and TiO2 + HZSM-5 zeolite combinate in the photodegradation of aqueous phenol and p-chlorophenol

V Durga , Kumari and M. , Subrahmanyam and K V, Subba Rao and A, Ratnamala and M, Noorjahan and Keiichi, Tanaka (2002) An easy and efficient use of TiO2 supported HZSM-5 and TiO2 + HZSM-5 zeolite combinate in the photodegradation of aqueous phenol and p-chlorophenol. Applied Catalysis A: General, 234 . pp. 155-165.

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Abstract

Titanium(IV) oxide of 2, 5, 10, and 15 wt.% was supported on HZSM-5 zeolite using solid state dispersion (SSD) method. These catalysts were characterized by BET surface area, XRD, UV–VIS–DR-spectra and SEM–EDAX. Characterization of TiO2/HZSM-5 (SSD) catalysts clearly shows that TiO2 dispersed in solid state is free of interaction with the zeolite. The photocatalytic activity of these systems in the degradation of aqueous phenol and p-chlorophenol indicates that TiO2/HZSM-5 (SSD) is an active photocatalyst; the optimum photodegradation activity is seen at 10–15 wt.% TiO2/HZSM-5. The same activity is also achieved by simply suspending TiO2+HZSM-5 combinate (mechanical mixture) in aqueous phenol and p-chlorophenol. Based on these results, a model highlighting the photodegradation activity of both immobilized [TiO2/HZSM-5 (SSD)] and mobilized [TiO2 + zeolite (combinate)] TiO2, which may lead to the development of an easy and effective technology in wastewater treatments, is proposed.

Item Type:Article
Subjects:Science > Chemistry
ID Code:503
Deposited By:INVALID USER
Deposited On:01 Apr 2007 17:23
Last Modified:01 Apr 2007 17:23

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