Localized Surface Plasmon Resonance Promotes Metal–Organic Framework-Based Photocatalytic Hydrogen Evolution

摘要

Combining metal nanoparticles (NPs) featured with localized surfaceplasmon resonance (LSPR) with metal–organic framework (MOF)-basedphotocatalysts is a novel means for achieving efficient separation of electron–hole pairs. Herein, the Au@NH_2-UiO-66/CdS composites are successfullysynthesized by encapsulating Au NPs with LSPR into the NH_2-UiO-66nanocage, further growing CdS NPs on the surface of the NH_2-UiO-66, whichexhibits higher photocatalytic activity in hydrogen evolution reaction undervisible-light irradiation than that of NH_2-UiO-66/CdS and CdS, respectively.Transient absorption measurements reveal that MOF is not only a transitstation for electrons generated from CdS to Au, but also a receiver for hotelectrons generated from plasmonic Au in Au@MOF/CdS composites.Thus, the LSPR-induced hot electron transfer from Au NPs is an importantmanifestation to prolong the carrier lifetime and enhance the photocatalyticperformance. This work provides insights into investigating the photoinducedcarrier dynamics of nanomaterials with LSPR effects for enhancing the MOFbasedphotocatalytic performance.