One pot synthesis of mesoporous ternary V2O5-TiO2-SiO2 catalysts

Mixed vanadia-titania-silica catalysts (3 or 6wt% V2O5, and 16-34wt% TiO2) were one pot prepared by sol-gel and hydrothermal methods in the presence of different surfactants. Tetraethylortosilicate (TEOS) was used as precursor for silica, tetraisopropylorthotitanate (TIPOT) for titania, and vanadyl sulfate for vanadia. As surfactants were used cetyltrimethylammonium bromide (CTMABr) or octadecyl-trimethylammonium bromide (ODCABr). The catalysts were characterized by adsorption and desorption curves of N-2 at 77 K, NH3-DRIFTS, H-2-TPR, XRD, in-situ Raman spectroscopy, XPS, and TEM.