Synthesis, features, and applications of mesoporous titania with TiO₂(B)

The mesoporous titania with TiO₂(B) (mt-TiO₂(B)), which has a lattice-matched core-shell crystalline structure with a thin TiO₂(B) phase sheathing an anatase core, was synthesized from potassium titanate (K₂Ti₂O₅) by hydration, ion exchange, and calcination. TiO₂(B) is a crystalline form of titania with a looser structure than anatase and rutile. Its synthesis, structure, and functions are reviewed. It has all the features of a large specific surface area with a mesoporous architecture, pore wall of high crystallinity and high thermostability. Nanoparticles of noble metals in this mesoporous structured titania are stable. Its potential industrial applications include photocatalysis, oil hydrorefining, and use as a drug carrier, solid acid catalyst, and electrode material. A pilot plant to prepare this unique multifunctional titania material at low cost has been established with a production capacity of 20 tons per year.