Synthesis and characterization of different binary and ternary phase mixtures of mesoporous nanocrystalline titanium dioxide

Abstract Different phase compositions of mesoporous nanocrystalline TiO 2 (meso-nc-TiO ), comprised anatase (16–100%), rutile (0–70%) and brookite (0–52%) were obtained by sol–gel synthesis with or without hydrothermal treatment (HTT) means titanium tetrabutoxide dibenzo-18-croun-6 as structure-forming agent in the presence HCl. It was shown, that small amounts surfactant and/or lanthanum salt well HTT determine composition texture meso-nc-TiO 2. All samples calcined at 500 о С characterized SEM, TEM, XRD N -adsorption/desorption isotherms. has been established photocatalytic properties almost all significantly exceed activity Evonik P-25 gas ethanol oxidation. The most active sample is (97%)-rutile (3%). obvious, decrease affected content. shown specific surface area not a key factor affecting mixed-phase process