Abstract
Abstract Metal doped TiO 2 catalyst sensitized with Ru II (2,2′-bipyridyl-4,4′-dicarboxylate) 2 -(NCS) 2 (N3 dye) is employed to photoreduce CO 2 with H 2 O under concentrated natural sunlight to fuels in an optical-fiber photoreactor. Production rate of methane of 0.617 μmol/g-cat h is measured on N3-dye-Cu(0.5 wt%)-Fe(0.5 wt%)/TiO 2 coated on optical fiber in April 12, 2007 in Taipei, Taiwan with the average concentrated solar light intensity of 20 mW/cm 2 . Full absorption of visible light of N3-dye along with efficient charge transfer in N3 dye–TiO 2 system give rise to the superior photoreduction of the resulting dye adsorbed catalyst.
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