Fig. 6From: Silica-Supported Titania–Zirconia Nanocomposites: Structural and Morphological Characteristics in Different MediaDetailed XPS of O 1s (a), Si 2p (b), Zr 3d (c), and Ti 2p (d) initial silica (Si 2p, O 1s) and TiO2–ZrO2/SiO2 at different contents of TiO2 (TiZrSi1 and TiZrSi2) calcined at 550 °CBack to article page