Chatterjee , Debabrata and Dasgupta , Shimanti and Dhodapkar , Rita S and Rao, Nageswar N (2006) Simultaneous degradation of non-emissive and emissive dyes on Visible light illuminated TiO2 surface. Journal of Molecular Catalysis A: Chemical, 260. pp. 264-268.
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Abstract
Simultaneous photocatalytic degradation of non-emissive dye, acid blue1 (AB1) and emissive dyes (eosinY or thionine) in air-equilibrated aqueous suspension of TiO2 semiconductor photocatalyst has been achieved at ambient conditions. Under visible light irradiation AB1 undergoes appreciable degradation in presence of a sensitizing dye (eosinY or thionine). However, concomitant decoloration of eosinY (EY) or thionine (Th)due to self-sensitized degradation was also noticed. Mechanistic proposals for the photocatalytic degradation of AB1 using a 150WXe lamp with a UV-filter (λ > 420 nm) as well as without a UV-filter, are discussed. Formation of reactive •O2−/•HO2 radicals is proposed to be responsible for the degradation of the selected dyes, AB1, EY and Th.
Item Type: | Article |
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Subjects: | Chemistry, Chemical Technology |
Divisions: | UNSPECIFIED |
Depositing User: | Users 4 not found. |
Date Deposited: | 15 Nov 2011 06:53 |
Last Modified: | 15 Nov 2011 11:17 |
URI: | http://neeri.csircentral.net/id/eprint/50 |
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