Journal
CATALYSIS LETTERS
Volume 131, Issue 3-4, Pages 381-387Publisher
SPRINGER
DOI: 10.1007/s10562-009-0076-y
Keywords
Titanium dioxide; Mesoporous silica; SBA-15; Carbon dioxide; Photoreduction
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Funding
- National Science Council, Taiwan, Republic of China [NSC 97-2221E-259-016]
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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.
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