Hybrid Metal–Organic Frameworks Encapsulated Hybrid Ni-Doped CdS Nanoparticles for Visible-Light-Driven CO₂ Reduction

Abstract

The photocatalytic production of syngas from CO2 and water is an attractive and straightforward way for both solar energy storage and sustainable development. Here, we combined the hybrid shell of a bimetallic metal–organic framework (MOF) Zn/Co-zeolitic imidazolate framework (ZIF) and the hybrid photoactive center of Ni-doped CdS nanoparticles (Ni@CdS) to construct a new “2 + 2” photocatalysis system Ni@CdS⊂Zn/Co-ZIF through a facile self-assembly process, which exhibited a double-synergic effect for visible light harvesting and CO2 conversion, leading to one of the highest photocatalytic syngas production rates and excellent recyclability. The H2/CO of syngas ratios can be readily adjusted by controlling the ratio of Zn/Co in the hybrid MOF shell.

Photoelectroactive metal–organic frameworks

“…3d). 58 The encapsulation of guest species, such as metal NPs/clusters, 98,109,154,156,157 metal oxide/sulde/selenide, 56,[158][159][160] QDs, 57,161 g-C 3 N 4 , 94,162,163 graphene, 59 and POMs, 164 in host MOFs to prepare hybrid composites for photocatalytic CO 2 reduction reactions has also been widely explored. For instance, the encapsulation of Pt NPs inside NH 2 -UiO-68, which was constructed from ZrCl 4 and amino-terphenyl-4,4 ′′ -dicarboxylic acid (NH 2 -tpdc), produced CO from CO 2 with a rate of 400.2 mmol g −1 in the presence of TEOA under visible light irradiation (400-780 nm).…”

Guest‐Induced Multilevel Charge Transport Strategy for Developing Metal‐Organic Frameworks to Boost Photocatalytic CO2 Reduction

“…In previous studies, researchers attempted to prevent the combination of photogenerated charges and holes to achieve high-efficiency photocatalytic performance and to increase the charge transfer paths in the catalytic system, as a viable approach. [33][34][35][36][37] Immobilizing functional molecules in MOF channels can provide nodes and space-transmission bridges for the transfer of photogenerated charges, [20,22,24,38] thereby further extending the lifetime of the photogenerated charges. Therefore, we introduced BPAN molecules not only as MOF skeleton components, but also as charge transition bridges embedded in the MOF cavities.…”

Integrating Ultrasmall Pd NPs into Core–Shell Imidazolate Frameworks for Photocatalytic Hydrogen and MeOH Production

“…The potential nanostructured photocatalysts describe the characteristics and functionality of porous materials. Because of their porous structure, organic–inorganic hybrid composition, synthetic advantages, coordinated metal nodes, and heteroatoms, metal organic frameworks (MOFs) are among the best-known examples of molecularly engineered materials. , Due to their outstanding benefits in structural optimization and component design, developing zeolitic imidazolate framework (ZIF)-based materials, including composites, and their derivatives for sustainable energy and green applications is a recent but rapidly broadening topic. It is possible to tailor ZIF structures with metal ions/clusters and carefully tailored organic linkers, resulting in materials with superior properties such as high photonic absorption, increased redox properties, permanent porosity, and rich active catalytic sites .…”