Perovskite-Nanoparticle-Incorporated\nNH₂‑MIL-125(Ti) Nanoreactors with an Optimal Conduction\nBand\nOffset for Visible-Light-Driven CO₂ Reduction

Abstract

To alleviate the intense global warming crisis, developing\nhigh-performance\nphotocatalysts for CO₂ reduction reaction (CO₂RR) to green fuels is of great importance. CsPbBr₃ (CPB)\nhas been proved as a promising photocatalyst for CO₂RR\ndue to the excellent visible-light response and energetic reduction\npotential, but its practical performance is still deficient, suffering\nfrom severe carrier recombination and poor CO₂ adsorption\ncapability. Herein, we demonstrate novel CPB-nanocrystal-incorporated\nNH₂-MIL-125(Ti) (NH₂-MIL-125(Ti)/CPB) nanoreactors\nfor solar-driven CO₂RR. Attributed to the optimal conduction\nband offset (CBO) in the NH₂-MIL-125(Ti)/CPB heterojunction,\nexcellent carrier transfer is obtained with retained energetic photoreduction\npotential. Moreover, strong interfacial interaction is demonstrated,\nenabling the synergistic effect of promoted CO₂ adsorption\non NH₂-MIL-125(Ti) and facilitating interfacial carrier\ninjection. Therefore, greatly enhanced photocatalytic CO₂RR performance is achieved by as-designed nanoreactors. This work\noffers a deep understanding into the synthesis of functionalized perovskite-based\nmaterials with rationally designed carrier transfer behaviors for\nnot only photocatalytic reactions but also photovoltaic fields.