Two-dimensional ultrathin surfactant-encapsulating polyoxometalate assemblies as carriers for monodispersing noble-metal nanoparticles with high catalytic activity and stability

Abstract

The Ag/DODA-PMo12 composite demonstrates a high catalytic efficiency in the catalytic reduction of 4-nitrobenzene.

Functional Nano-Objects by Electrostatic Self-Assembly: Structure, Switching, and Photocatalysis

“…By loading the aggregates with Ag-nanoparticles, 4-nitrophenol (4-NP) is reduced in the presence of NaBH 4 . Moreover, other POM-surfactant materials are known as heterogeneous catalysts ( Sun et al, 2018 ; Ji X. Y. et al, 2021 ).…”

“…By loading the aggregates with Ag-nanoparticles, 4-nitrophenol (4-NP) is reduced in the presence of NaBH 4 . Moreover, other POMsurfactant materials are known as heterogeneous catalysts (Sun et al, 2018;Ji X. Y. et al, 2021). Sun et al used Na 9 [EuW 10 O 36 ]•32H 2 O in combination with a cationic peptide which forms spheres of R H 285 nm but starts to precipitate after a few days (Tong et al, 2017).…”

Recent Advances in Hybrid Materials of Metal Nanoparticles and Polyoxometalates

“…In addition, POM‐based hybrid frameworks have recently been used as excellent supports for metal nanoparticles owing to their enhancement of the structural stability, increased specific surface, and existence of well‐connected nanopores [54–60] . For example, a hollow ascorbic‐acid‐doped H 4 SiW 12 O 40 ‐based microtube with tunable components has been developed and proved useful for the in situ immobilization of Ag nanoparticles [54] .…”

“…For example, a hollow ascorbic‐acid‐doped H 4 SiW 12 O 40 ‐based microtube with tunable components has been developed and proved useful for the in situ immobilization of Ag nanoparticles [54] . Subsequently, the construction of a POM‐based MOF, [55] a nanowire assembly (Figure 8c), [56] a hybrid coordination network, [57] porous ionic polymers, [58] a 3D mesoporous superstructure, [59] and a 2D ultrathin assembly have been reported to generate highly dispersive and stable metal nanoparticles [60] …”

Five new multifunctional inorganic–organic hybrids based on Keggin-type polyoxometalates and a 3,5-di(1H-imidazol-1-yl)benzoic acid ligand

“…19,20 Among the different types of POMs, Keggin type polyanions have been widely employed to synthesize inorganic–organic compounds because of their diverse electronic, magnetic and catalytic properties in recent decades. 21–24 For example, Saeed Farhadi's group obtained a series of Keggin-type polyoxometalate hybrid nanomaterials with the performance of fast adsorption of cationic methylene blue. 25 Recently, Su et al designed two {SiW 12 } based POMOFs, which had good electrocatalytic reduction of BrO 3 − and NO 2 − /oxidation ascorbic acid properties.…”