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Title: Photodegradation of surfactants on the dye modified TiO2 surface using visible light
Authors: Chatterjee, Debabrata
Mahata, Anima
Issue Date: Jul-2003
Publisher: NISCAIR-CSIR, India
Abstract: Degradation of cationic CPC (cetyl pyridinium chloride), anionic DBS (sodium dodecylbenzene sulfonate) and neutral Triton-X 100 (octylphenyl polyoxyethylene ether) surfactants in air-equilibrated aqueous mixtures has been achieved on the surface of TiO2 semiconductor modified with Thionine, Eosin Y and Nile blue A by using visible light. Under 8 hr of irradiation with a 50W tungsten lamp, over 45-65% degradation of surfactants has been observed. A working mechanism involving excitation of surface adsorbed dye, followed by charge injection into the TiO2 conduction band and formation of reactive ˙OH radicals is proposed.
Page(s): 1627-1631
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.42A(07) [July 2003]

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