A series of mesoporous TiO 2 /SBA-15, Cu/TiO 2 and Cu/TiO 2 /SBA-15 composite photocatalysts were prepared by sol-gel synthesis for photoreduction of CO 2 with H 2 O to methanol. It was found that optimum amount of titanium loading of TiO 2 /SBA-15 was 45 wt% which exhibited higher photoreduction activity than pure TiO 2 .
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