Figure 2

Optical properties of P25, p-P25, P25/st-TIO and H-TiO2 (p-P25/st-TIO).
(a) Reflectance spectra recorded, within the UV-visible light wavelength range, on the pure P25 and top-surface patterned P25 (p-P25). (b) Diffuse reflectance spectra of P25, P25/st-TIO and H-TiO2, (c) Transmittance spectra, (d) UV-visible absorption spectra and (e) Schematic illustration of P25, p-P25, P25/st-TIO and H-TiO2.