Abstract
We report the fabrication of a novel titania membrane of the dual-pore system that isstrategically designed and prepared by a two-step replication process and sol–gel reaction.The primary nanoporous channel structure is fabricated by the cage-like PMMA template(CPT) obtained from the nanoporous alumina membrane and the secondary mesoporousstructure is formed by the sol–gel reaction of the lyotropic precursor solution within theCPT. Furthermore the mesoporous titania membrane (MTM) frame consists of the titaniananoparticles of 10–12 nm in diameter. Morphology and structural properties of the MTMare investigated by field emission scanning electron microscopy, high resolutiontransmission electron microscopy, x-ray diffraction and Brunauer–Emmett–Teller surfacearea. The photocatalytic activity and the solar energy properties of the MTM arecharacterized by UV–vis spectrophotometer, spectrofluorometer and photoinducedI–V measurement. The photocatalytic test indicates that the MTM has higher efficiency thanthe commercial P25 with a good recyclability due to its large-scale membranestyle and the preliminary result on the solar cell application shows a solar energyconversion efficiency of 3.35% for the dye-sensitized solar cell utilizing the MTM.
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