Fig. 7
Representative Raman spectrum of TiO2-2.5: a pure titanium oxide site on sample (a), a pure titanium oxide site on sample within the spectral range from 100–1000 cm –1(b), a carbon-rich site on sample (c), three-component deconvolution of the Raman spectrum of bands characteristic for carbon on sample (d), and Raman spectrum of a carbon-rich site on sample TiO2-5 (e), image from an optical microscope of an example sample examined by Raman spectroscopy (bulk material, prepared from a portion of sol annealed at 485 ˚C) (f).
