Titanium alkoxo oximates, with surfactant-like properties of the oximate ligands, as precursors for porous TiO2 and mixed oxide sol–gel films

Abstract

Titanium alkoxo oximates with long-chain alkyl groups were used as sol–gel precursors for simultaneous deceleration of the reaction rates of Ti(OR)₄ and creation of porosity upon calcination due to surfactant-like properties. Both titania and hybrid silica–titania films with high surface areas were obtained. Extraction studies showed that only part of the employed oxime is coordinated, but both coordinated and non-coordinated oxim(at)e contribute to pore formation upon heat treatment. Sorption properties of silica–titania hybrid materials were studied by investigating temperature-programmed desorption of toluene.