Synthesis of TiO2-SiO2 Xerogels via the Hydrolysis of a Tetrabutoxytitanium-Tetraethoxysilane Mixture in Aqueous Ammonia and Hydrochloric Acid Atmospheres

TiO2-SiO2 xerogels have been synthesized by the hydrolysis of tetrabutoxytitanium-tetraethoxysilane mixtures in a 10% aqueous ammonia vapor and concentrated hydrochloric acid vapor atmospheres under static conditions. The dependence of the physical and chemical properties of the xerogels on the synthetic conditions has been investigated.