Alkyl group-decorated g-C3N4 for enhanced gas-phase CO2 photoreduction

Abstract

With excellent physical/chemical stability and feasible synthesis, g-C₃N₄ has attracted much attention in the field of photocatalysis. However, its weak photoactivity limits its practical applications. Herein, by easily planting hydrophobic alkyl groups onto g-C₃N₄, the hydrophilicity of g-C₃N₄ can be well regulated and its specific surface area be enlarged simultaneously. Such a modification ensures enhanced CO₂ capture and increased active sites. In addition, the introduction of alkyl groups endows g-C₃N₄ with abundant charge density and efficient separation of photoinduced excitons. All these advantages synergistically contribute to the enhanced photocatalytic CO₂ reduction performance over the optimized catalyst (DCN90), and the total CO₂ conversion is 7.4-fold that of pristine g-C₃N₄ (CN).