Construction of metal-organic-frameworks-based composite photocatalysts has attracted much attention for the reasonable band gap and high surface areas to improve the photocatalytic activity. In this study, the ternary heterojunction Pd@UiO-66-NH₂@ZnIn₂S₄ nanocomposites were facilely prepared for the first time by a two-step method. The visible-light-promoted hydrogen production rate of 0.3 % Pd@UiO-66-NH₂@ ZnIn₂S₄ reaches up to 5.26 mmol g⁻¹ h⁻¹, which is evidently much higher than pure UiO-66-NH₂, ZnIn₂S₄ and binary UiO-66-NH₂/ZnIn₂S₄ composites. Such a huge improvement in the photocatalytic performance is mainly attributed to the matched band gap of ZnIn₂S₄ and UiO-66-NH₂, and the introduction of Pd NPs into photocatalysts that broaden spectral response range and promote the photon induced charge carrier separation. This work may provide a feasible approach for the design and construction of metal-organic-frameworks-based photocatalytic materials.

https://doi.org/10.1016/j.jmst.2020.11.028Cao-2021-Facile-construction-of-highly-effic.pdf