Photoreduction of Methyl Orange was investigated by using Nile Red-adsorbed TiO2 / Y zeolites.
Nile Red was successfully adsorbed on TiO2 / Y zeolites and the absorption profile is very broad with maxima, ca. 630 nm.
The peak is largely red-shifted compared to that observed in hydrocarbon solvents.
Furthermore, a broad and largely Stokes shifted emission band as observed around 660 nm.
The largely Stokes shifted emission band should be originated from the excited state structural changes.
In order to understand the photocatalytic activities of Nile Redadsorbed TiO2 / Y zeolite, the photoreduction of Methyl Orange (5.0
10-5 M) was studied using visible light beyond 320 nm.
Methyl Orange was effectively reduced by Nile Red-adsorbed TiO2 / Y zeolite, indicating the photocatalytic activity of Nile Red-adsorbed TiO2 / Y zeolites was enhanced by about eight times higher than that of TiO2 / Y zeolite.