title: Fabrication of mesoporous titania membrane of dual-pore system and its photocatalytic activity and dye-sensitized solar cell performance.
abstract: We report the fabrication of a novel titania membrane of the dual-pore system that is strategically 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 mesoporous structure is formed by the sol-gel reaction of the lyotropic precursor solution within the CPT. Furthermore the mesoporous titania membrane (MTM) frame consists of the titania nanoparticles of 10-12 nm in diameter. Morphology and structural properties of the MTM are investigated by field emission scanning electron microscopy, high resolution transmission electron microscopy, x-ray diffraction and Brunauer-Emmett-Teller surface area. The photocatalytic activity and the solar energy properties of the MTM are characterized by UV-vis spectrophotometer, spectrofluorometer and photoinduced I-V measurement. The photocatalytic test indicates that the MTM has higher efficiency than the commercial P25 with a good recyclability due to its large-scale membrane style and the preliminary result on the solar cell application shows a solar energy conversion efficiency of 3.35% for the dye-sensitized solar cell utilizing the MTM.
authors: Department of Chemistry, Yonsei University, Seoul 120-749, Republic of Korea.
authors: Seung-Lim
authors: SL
authors: Oh
authors: Kyong-Hoon
authors: KH
authors: Choi
authors: Ji-Eun
authors: JE
authors: Im
authors: Kang-Kyun
authors: KK
authors: Wang
authors: Hae-Yong
authors: HY
authors: Yaung
authors: Kyungkon
authors: K
authors: Kim
authors: Yong-Rok
authors: YR
authors: Kim