改性氮化碳用于光催化CO2还原的研究进展OA

The research on solar-driven photocatalytic CO2 reduction to fuels and high-value-added chemicals over graphitic carbon nitride(g-C3N4)has attracted significant attention,emerging as a feasible strategy to facilitate achievement of the"carbon neutrality"goals.However,this technology still faces technical challenges,such as rapid recombination of photogenerated charge carriers and difficulties in CO2 activation.Understanding the mechanistic fundamentals of photocatalytic CO2 over g-C3N4 reduction is essential,and exploring synthesis and modification strategies for g-C3N4 may hold the key to addressing these limitations.Currently,practical and promising modification strategies mainly include the following three categories:Elemental doping to tailor the electronic band structure of the catalyst and extend the light absorption range;Construction of heterojunctions to facilitate the separation and migration of photogenerated carriers and enhance the utilization efficiency of electrons;Micro/nano-structural morphology engineering to increase the specific surface area and expose more active sites,thereby improving CO2 adsorption/activation and reaction kinetics.Based on literature survey and comprehensive analysis,it is found that the synergistic multi-scale modification of catalysts,precise regulation of product distribution,and enhancement of material stability collectively contribute to a more significant improvement in the catalytic performance of g-C3N4-based photocatalysts.