The design and modification of heterojunction photocatalysts to enhance efficient interfacial charge transfer and superior photocatalytic performance are fundamental objectives in the field of solar-light-driven energy conversion and production. This study presents a novel S-scheme heterojunction which features lattice-matched morphological hetero-nanostructures, composing of two-dimensional (2D) graphitic carbon nitride (CN) loaded with uniformly distributed and size-consistent 2D nano-rhombohedral α-Fe2O3 (Fe2O3 NR/CN). The directional charge transfer in the lattice-matched S-scheme heterojunction was confirmed using a combination of in situ irradiated X-ray photoelectron spectroscopy, metal deposition experiments, electron paramagnetic resonance, and density functional theory calculations. The optimized heterojunction demonstrates exceptional photocatalytic activity, achieving a hydrogen generation rate that surpasses those of g-C3N4 and α-Fe2O3 alone by factors of 2.1 and 7, respectively. Additionally, this heterojunction exhibits an excellent styrene conversion rate of 94.1 % and a styrene epoxidation selectivity of 95.3 % under light irradiation at 80 ◦C using tert-butyl hydroperoxide (TBHP) as the oxidant. The incorporation of uniformly distributed nano-rhombohedral α-Fe2O3 particles with g-C3N4 successfully constructs an unobstructed interfacial pathway to form the lattice-matched Sscheme heterojunction, enabling efficient separation of photogenerated carriers. This unique structure provides a valuable reference for dual-functional photocatalytic reactions.

文章链接：https://doi.org/10.1016/j.jcat.2024.115746

附件：

10.1016-j.jcat.2024.115746.pdf