Figure 4
(a) Absorbance (black dots) and transmittance (red dots) at 210 nm of nanocomposite films (thickness: 100 nm) for different concentrations of NPs measured by UV–vis spectroscopy. (b) and (c) Conversion of the C=C band plotted as a function of the irradiation time for respectively 0.4 vol% and 10 vol% of CoFe2O4 MNPs, and for several film thicknesses in the range 150–530 nm. Irradiation was carried out with LC8 lamp (70 mW/cm2) and conversion was calculated from the decrease of the 1638 cm−1 band (molar ratio Si/Ti : 6/1).
