Article

Catalysis Letters

, Volume 131, Issue 3, pp 381-387

First online:

Mesoporous TiO2/SBA-15, and Cu/TiO2/SBA-15 Composite Photocatalysts for Photoreduction of CO2 to Methanol

  • Hsien-Chang YangAffiliated withEnergy and Environment Research Laboratories, Industrial Technology Research Institute
  • , Hsin-Yu LinAffiliated withDepartment of Materials Science and Engineering, National Dong Hwa University Email author 
  • , Yu-Shiang ChienAffiliated withDepartment of Materials Science and Engineering, National Dong Hwa University
  • , Jeffrey Chi-Sheng WuAffiliated withDepartment of Chemical Engineering, National Taiwan University
  • , Hsin-Hsien WuAffiliated withEnergy and Environment Research Laboratories, Industrial Technology Research Institute

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Abstract

A series of mesoporous TiO2/SBA-15, Cu/TiO2 and Cu/TiO2/SBA-15 composite photocatalysts were prepared by sol–gel synthesis for photoreduction of CO2 with H2O to methanol. It was found that optimum amount of titanium loading of TiO2/SBA-15 was 45 wt% which exhibited higher photoreduction activity than pure TiO2. An addition of copper on TiO2 or TiO2/SBA-15 catalyst as cocatalyst was found to enhance the catalytic activity because copper serves as an electron trapper and prohibits the recombination of hole and electron.

Keywords

Titanium dioxide Mesoporous silica SBA-15 Carbon dioxide Photoreduction