关键词: 二氧化钛, 光催化还原, 二氧化碳, 工业烟气

Abstract: In this paper，the recent progress in photocatalytic reduction of CO2 using different titania-based photocatalysts，including pure titania，metal-doped titania，nonmetal-doped titania，co-doped titania，titania-based nanocomposites，organic photosensitizer modified titania and other titania photocatalys were introduced. Then the phtocatalytic activities of these catalysts were compared；the advantages and machanisms of them were addressed；and the effects of photocatalytic reactors and experimental conditions，such as irradiation time，reaction temperature，CO2 pressure and mole ratio of H2O to CO2 on the activities of titania-based catalysts，were discussed. Through the joint use of several modified measures and the optimization of reaction system，the improvement of photocatalytic reaction activity and utilization of light would be the development trend and focus of future research. Challenges and potential application prospects of photocatalytic reduction of industrial flue gas，especially oxyfuel combustion flue gas，were presented.

Key words: titania, photocatalytic reduction, carbon dioxide, industrial flue gas