Preparation of porous TiO₂ spheres using organic monolith templates and application to water purification

Abstract

Titanium salt solution was impregnated into organic monolith particles and porous TiO₂ sphere particles were prepared by subsequent calcination. The pore size in the TiO₂ spheres were around 20 nm, and its distribution was narrow. The surface of the spheres were modified by Tungsto(VI) phosphoric acid and octadecylphosphonic acid. The photocatalytic decomposition activity of 1,4-dioxane in aqueous solution was improved by these treatments. The effect of these surface modifications were discussed.