Abstract
Ag or Pt-deposited TiO2 nanocomposites were prepared by a simple method, in which oriented TiO2 nanorods were synthesized by a hydrothermal method and a noble metal (Ag or Pt) was deposited on TiO2 by photocatalytic reduction under UV irradiation. The oriented TiO2 nanorods with Ag or Pt nanoparticles (<20nm) exhibited high CO2 photoreduction efficiency, with CH4 yield rates up to 16.0ppm/gh and 10.8ppm/gh, respectively, considerably higher than that of the pure TiO2 nanorods (4.2ppm/gh). The improvement in the CH4 yield was attributed to the formation of a Schottky barrier and surface plasmon resonance.
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