Photogenerated hole traps in metal-organic-framework photocatalysts for visible-light-driven hydrogen evolution.

ABSTRACT: Efficient electron-hole separation and carrier utilization are key factors in photocatalytic systems. Here, we use a metal-organic framework (NH₂-UiO-66) modified with inner platinum nanoparticles and outer cadmium sulfide (CdS) nanoparticles to construct the ternary composite Pt@NH₂-UiO-66/CdS, which has a spatially separated, hierarchical structure for enhanced visible-light-driven hydrogen evolution. Relative to pure NH₂-UiO-66, Pt@NH₂-UiO-66, and NH₂-UiO-66/CdS samples, the Pt@NH₂-UiO-66/CdS composite exhibits much higher hydrogen yields with an apparent quantum efficiency of 40.3% at 400 nm irradiation and stability over the most MOF-based photocatalysts. Transient absorption measurements reveal spatial charge-separatio

SUBMITTER: Lian Z 

PROVIDER: S-EPMC9814188 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature