A simple strategy for engineering heterostructures of Au nanoparticle-loaded metal–organic framework nanosheets to achieve plasmon-enhanced photocatalytic CO₂ conversion under visible light

Abstract

The heterostructures of AuNPs anchored PPF-3 nanosheets by electrostatic interaction exhibit an enhancement of photocatalytic CO2 conversion under visible light by plasmon-induced resonance energy transfer.

Plasmonic Materials: Opportunities and Challenges on Reticular Chemistry for Photocatalytic Applications

“…In this study, porphyrin paddle‐wheel framework nanosheets (PPF‐3_1) absorb many more photons due to amplification of the local electric field induced by LSPR of Au, leading to a high concentration of Co + ions. Consequently, CO 2 molecules are efficiently adsorbed on cobalt active sites and reduced into HCOOH [55] . The homogeneous dispersion of Au plasmonic nanospheres (<30 nm) over the surface of PPF‐3_1 (Figure 6b) guarantees a maximized LSPR phenomenon (∼520 nm) [55,56] .…”

“…Consequently, CO 2 molecules are efficiently adsorbed on cobalt active sites and reduced into HCOOH [55] . The homogeneous dispersion of Au plasmonic nanospheres (<30 nm) over the surface of PPF‐3_1 (Figure 6b) guarantees a maximized LSPR phenomenon (∼520 nm) [55,56] . However, efficient interaction between Au plasmonic nanoparticles (PNPs) and PPF‐3_1 surface is crucial in order to enable the hot electron injection.…”

“…This plasmon‐based‐reticular 2D nanocomposite promotes a smooth injection of hot electrons from the Au to the LUMO. However, low stability could represent a significant issue for these types of materials due to their weakness in acid chemical environments [55] . Therefore, to protect the plasmonic metal a simple core‐shell strategy is majorly used.…”

Plasmonic Photocatalysts for Sunlight‐Driven Reduction of CO2: Details, Developments, and Perspectives

“…Chen et al. reported the synthesis of thin porphyrin paddle‐wheel framework‐3 (PPF‐3) nanosheets with anchored Au NPs, which exhibited an outstanding photocatalytic activity for CO 2 reduction to HCOOH . The formation rate of HCOOH was determined to be 42.7 μmol g −1 h −1 , being fourfold higher than over the pristine catalyst without Au NPs.…”

Metal–Organic Layers Hierarchically Integrate Three Synergistic Active Sites for Tandem Catalysis

“…Metal‐organic layers (MOLs), a 2D monolayered version of 3D MOFs, [1–21] have recently provided a tunable material platform for the design of heterogeneous catalysts featuring isolated, uniform, and well‐defined active sites (Figure 1 a). [22–31] Hierarchical integration of multiple catalytic centers into MOLs can facilitate synergistic or tandem catalysis to potentially afford atom‐economic and step‐efficient synthetic methodologies [32, 33] . Although several MOLs with two different active centers have been constructed (Figure 1 b) [34–38] and some of them have shown enhanced catalytic performance over their homogenous counterparts, [37, 38] the design of MOLs containing three or more different catalytic centers remains a challenge [23, 39] …”