A novel two-fold interpenetrating 3D metal-organic framework based on Lindqvist-type hexamolybdate: Synthesis, structure, electrochemical and photocatalytic properties

Wang, Xiuli; Zhang, Huixiu; Zhang, Shan; Liu, Jiahuan; Huang, Lin; Liu, Guocheng

doi:10.1016/j.inoche.2017.12.015

Cited by 8 publications

(2 citation statements)

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“…However, the search for better, more efficient, and stable photocatalysts still necessitates explorations of newer systems for photocatalytic dye degradation. Redox-rich POM-based hybrids have also been extensively used for various electrochemical studies starting from energy storage, water splitting, , and nitrite reduction to supercapacitance studies . In this report, using in situ direct hydrothermal techniques, we synthesized two analogous and isostructural POMOFs, namely, Comp1 : [H(C 10 H 10 N 2 )Cu 2 ][PMo 12 O 40 ] & Comp2 : [H(C 10 H 10 N 2 )Cu 2 ][PW 12 O 40 ] based on the twin Keggin anions (PMo 12 O 40 3– & PW 12 O 40 3– ), 4,4′-bipyridine (4,4′-bp), and Cu 1+ as the secondary metal cation.…”

Section: Introductionmentioning

confidence: 99%

“…48 However, the search for better, more efficient, and stable photocatalysts still necessitates explorations of newer systems for photocatalytic dye degradation. Redox-rich POM-based hybrids have also been extensively used for various electrochemical studies 11 starting from energy storage, 12 water splitting, 49,50 and nitrite reduction 51 to supercapacitance studies. 15 3− ), 4,4′-bipyridine (4,4′-bp), and Cu 1+ as the secondary metal cation.…”

Section: Introductionmentioning

confidence: 99%

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Two Keggin-Based Isostructural POMOF Hybrids: Synthesis, Crystal Structure, and Catalytic Properties

et al. 2018

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In this work we synthesized two novel isostructural twin hybrids Comp1: [H(CHN)Cu][PMoO] & Comp2: [H(CHN)Cu][PWO], based on the Keggin ions (PMoO & PWO), Cu(I) cation, and 4,4'-bipyridine, by in situ hydrothermal reduction of Cu, facilitated through extensive standardizations of synthetic pH conditions. Both compounds crystallized in monoclinic P2/ c space group with similar lattice parameters and crystal structures. The structural similarity prompted us to explore comparative catalytic properties of the hybrids, to understand the relative role of the POM species in the activity. While characterization techniques like powder X-ray diffraction (XRD), single-crystal XRD, IR, adsorption studies, etc. confirmed the identical structural hierarchy in the twin polyoxometalate-based metal organic frameworks (POMOFs), critical analyses through X-ray photoelectron spectroscopy, X-ray absorption near-edge structure spectroscopy, and magnetic property studies elucidated the electronic and local structural properties of the two. The hybrids were highly active for heterogeneous catalysis of small-molecule oxidation, with Comp 2 showing better activity than Comp1, particularly for oxidation of ethylbenzene and cyclooctene. Comp2 also outperformed Comp1 in photocatalytic degradation of methylene blue, with higher conversion efficiency of 83% and one order higher apparent rate constant of 0.0139 min, which is comparable to that of the well-known photocatalyst, P25. Electrochemical pseudocapacitance studies revealed that these POMOFs are having the potential to act as good charge storage and conducting devices if their electrochemical stability can be improved.

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