Effect of Gold Dispersion on the Photocatalytic Activity of Mesoporous Titania for the Vapor-Phase Oxidation of Acetone

Figure 10

C–H stretching region infrared spectra of sample H3 (hydrothermally synthesized Au/TiO₂), exposed to 0.2 ∼mol of acetone vapor and recorded after the lapse of 10 minutes (curve (b)) and subsequent heating at 320 K (curve (c)) and 360 K (curve (d)). Curve (a) shows corresponding vibrational bands of acetone vapor. The numbers given in the parentheses indicate the absorbance value of the particular IR band.