Increasing global warming and energy shortage caused by traditional fossil energy combustion to carbon dioxide (CO2) has become a significant global issue in view of humansʹcontinuing development. The photocatalytic reduction of CO2 produced from hydrocarbon fuels using solar light and semiconductor photocatalytic materials could not only decrease the concentration of carbon dioxide in the atmosphere and thus reduce the greenhouse warming effect, but also provide hydrocarbon fuels to partial y al eviate the energy shortage crisis. Hence, the photocatalysis technique has attracted considerable attention in industry and academic areas. In this paper, the fundamental principles of heterogeneous photocatalysis and the recent progress in the photocatalytic reduction of CO2 to hydrocarbon fuels are introduced and reviewed. Based on previous reports in the field of photocatalysis research, the main types of semiconductors capable of photocatalytic reduction of carbon dioxide can be summarized as fol ows: pure TiO2 photocatalysts, ABO3 perovskite-structured photocatalysts, spinel-structured photocatalysts, doped oxide photocatalysts, composite semiconductor photocatalysts, V-, W-, Ge-, Ga-based photocatalysts, and graphene-based photocatalysts. In addition, the characteristics of various photocatalytic materials and some factors affecting photocatalytic activities are reviewed and analyzed. Final y, the prospects and chal enges for developing new photocatalysts for CO2 reduction are presented.%传统化石能源燃烧产生CO2引起的地球变暖和能源短缺已经成为一个严重的全球性问题。利用太阳光和光催化材料将CO2还原为碳氢燃料，不仅可以减少空气中CO2浓度，降低温室效应的影响，还可以提供碳氢燃料，缓解能源短缺问题，因此日益受到各国科学家的高度关注。本文综述了光催化还原CO2为碳氢燃料的研究进展，介绍了光催化还原CO2的反应机理，并对现阶段报道的光催化还原CO2材料体系进行了整理和分类，包括TiO2光催化材料， ABO3型钙钛矿光催化材料，尖晶石型光催化材料，掺杂型光催化材料，复合光催化材料， V、W、Ge、Ga基光催化材料及石墨烯基光催化材料。评述了各种材料体系的特点及光催化性能的一些影响因素。最后对光催化还原CO2的研究前景进行了展望。
展开▼
