Citation:

Virkutyte, J. AND R. S. VARMA. Synthesis and visible light photoactivity of anatase Ag, and garlic loaded TiO2 nanocrystalline catalyst. RSC Advances. RSC Publishing, Cambridge, Uk, 2(6):2399-2407, (2012).

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To inform the public.

Description:

An excellent visible light activated Ag and S doped TiO2 nanocatalyst was prepared by using AgNO3 and garlic (Allium sativum) as Ag+ and sulfur sources, respectively. The catalyst resisted the change from anatase to rutile phase even at calcination at 700 oC. The photocatalytic efficiencies of as-prepared nanocatalysts was evaluated by the degradation (100 ppm) of the model compound azodye, methyl orange (MO), under the visible light irradiation for 3 to 4 hours from incandescent light bulb (300 W). The process followed first order reaction kinetics with reaction rates ranging from 1.6 × 10-3 to 19.4 × 10-3 min-1. The dye was decomposed in 3 h in the presence of Ag, S-co-doped TiO2 calcined at 700 oC. The catalyst was used for up to 5 consecutive runs without the significant loss in the photocatalytic activity and could be regenerated by adopting a simple procedure of washing with water and acetone as well as drying at 200 oC for 2 hours.

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