Pressure–temperature phase diagrams of pure and Ag-doped nanocrystalline TiO2 photocatalysts

In situ synchrotron radiation X-ray diffraction methods were used to determine the low pressure–high temperature phase diagrams of nanocrystalline TiO2 powder specimens obtained using a room temperature sol–gel procedure. Nanostructured Ag-doped bulk titania specimens were pressure sintered and their surface microstructural features (mesoporosity, uniform formation of surface metal clusters) optimized for their envisaged application as photocatalytic materials for air and water decontamination.