We demonstrate a simple route for the preparation of new three-dimensionally interconnected
hierarchically porous anatase TiO2 foams via a dual-templating approach. The
macropores in TiO2 foams are induced through a process of sintering the polyurethane foams
template, while a surfactant templating agent promotes the formation of mesopores in the
walls of a macroporous monolith of TiO2 foam. The macropore sizes of interconnected
networks can be tuned by varying the pores per linear inch of polyurethane foams. This single
step method of synthesis from cheap commercially available chemicals is suitable for mass
production of three-dimensionally interconnected macro/mesoporous TiO2 foams.