Scholarly record
INVESTIGATION OF THE EFFECT OF SnO2-COUPLING ON THE PHOTOCATALYTIC ACTIVITY OF TiO2
Abstract
The photodegradation of Acid Yellow 23 a model compound from monoazo textile dyes was investigated using TiO2, SnO2 and TiO2+SnO2 suspension as photocatalysts at different gap sizes. The results showed that the coupled particles were not much different from single TiO2 system at the gap size of 4.5 cm in a batch reactor. But the coupled system was more effective when the gap size was reduced to 2.5 cm. A complete decolorization occurs at the gap size of 1.1 cm after 20 min of irradiation while 90\% decolorization takes place at the gap size of 4.6 cm after 100 min of irradiation.
Publication details
References18
Changes EP, Durrant LR. Decolorization of azo dyes by Phanerochaete chrysosporium and Pleurotus sajorcaju. Enzyme Microb Technol 2001;29:473-7.
Malik PK, saha SK. Oxidation of direct dyes with hydrogen peroxide using ferrous ion as catalyst. Sep Purif Tech 2003;31:241-50. Fig. 8. Comparison of photocatalytic activity of TiO2 , SnO2 and SnO2+ TiO2 on photocatalytic degradation of AY23 at the gap size of 2.5 cm. Io = 41 W m-2, [TiO2] =375 mg l -1, [SnO2] =375 mg l -1, [AY23] o = 40 mg l -1. Fig. 9.Effect of gap size on the photodegradation activity of AY23. Io = 41 W m-2, [TiO2] =375 mg l -1, [SnO2] =375 mg l -1, [AY23] o = 40 mg l -1.
Behnajady MA, Modirshahla N, Hamzavi R. Kinetic study on photocatalytic degradation of C.I. Acid Yellow 23 by ZnO photocatalyst. J Hazard Mater 2006;133:226-32.
Ollis DF, Al-Ekabi H. Eds. Photocatalytic purification and treatment of water and air; Elsevier: Amsterdam, 1993.
Turchi CS, Ollis DF. Mixed reactant photocatalysis: Intermediates and mutual rate inhibition.J Catal 1989;119:483-96.
Bacsa RR, Kiwi J. Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degradation of p-coumaric acid. Appl Catal B 1998;16:19-29.
Khodja AA, Sehili T. Pilichowski JF, Boule P. Photocatalytic degradation of 2- phenylphenol on TiO2 and ZnO in aqueous suspensions. J Photochem Photobiol A 2001;141:231-39.
Serpone N, Borgarello E, Gratzel M. Visible light induced generation of hydrogen from H2S in mixed semiconductor dispersions; improved efficincy through inter-particle electron transfer. J Chem Soc Chem Commun 1984;342:123-33.
Vinodgopal K, Prashant V, Kamat. Enhanced rates of photocatalytic degradation of an azo dye using SnO2/TiO2 coupled semiconductor thin films. Environ Sci Technol 1995;29:841-45.
Serpone N, Maruthamuthu P, Picat D, Pelizzetti E, Hidaka H. Exploiting the inter particle electron transfer process in the photocatalyzed oxidation of phenol, 2- choloro phenol and pentacholorophenol: chemical evidence for electron and hole transferr between coupled semicoductors. J Photochem Photobiol A 1995;85:247-55.
Kuo CY, Lin HY. Effect of coupled semiconductor system treating aqueous 4- nitrophenol. J Environ Sci Health A 2004;39:2113-27.
Wu CH. Comparison of azo dye degradation efficiency using UV/single semiconductor and UV/coupled semiconductor systems. Chemosphere 2004;57:601-8.
Daneshvar N, Rabbani M, Modishahla N, behnajady MA. Kinetic modeling of photocatalytic degradation of Acid Red 27 in UV/TiO2 process. J Photochem Photobiol A 2004;168:39-45.
Chkrabarti S, Dutta BK. J. Photocatalytic degradation of model textile dyes in wastewater using ZnO as semiconductor catalyst. J Hazard Mater 2004;112:269-78.
Zhao H, Xu S, Zhoug J, Bao X. Kinetic study on the photocatalytic degradation of pyridine in TiO2 suspension systems. Catal Today 2004;93-95:857-61.
Bekbolet M, Balcioglu I. Photocatalytic degradation kinetics of humic acid in aqueous TiO2 dispersions: The influence of hydrogen peroxide and bicarbonate ion. Water Sci Technol 1996;34:73-80.
Goncalves MST, Pinto EMS, Nkeonye P, Oliveira-Campos AMF. Degradation of C.I. Reactive Orange 4 and its simulated dyebath wastewater by heterogeneous photocatalysis. Dyes Pigments 2005;64:135-9.
Muruganandham M, Shobana N, Swaminathan M. Optimization of solar photocatalytic degradation condintions of Reactive Yellow 14 azo dye in aqueous TiO2. J Mol Catal A 2006;246:154-161.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
