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3D POMOF based on {AsW12} cluster and Ag-MOF with interpenetrating channels for large-capacity aqueous asymmetric supercapacitors and highly selective biosensors detecting hydrogen peroxide

Abstract

The {AsW12O40} clusters are grafted into Ag-MOF to yield two 3D polyoxometallate-based metal organic frameworks (POMOFs), (imi)2[{Ag3(tpb)2}2(H2O){AsW12O40}2]·6H2O (1) and [(Ag7bpy7Cl2){AsWV2WVI10O40}]·H2O (2) (imi = imidazole; tpb = 1, 2, 4, 5-tetrakis (4-pyridyl) benzene; bpy = 4, 4’-bipyridyl). Title compounds are complicated 3D networks with intersecting channels and novel topology. They exhibit larger capacitance (929.7 and 986.1 F g-1 at a current density of 3 A g−1), superior rate capability, higher capacity retention rate, boosting conductivity and electrocatalytic activities than those of their maternal POM, which can be ascribed to the introduction of Ag-MOF, interpenetrating channels, and the unique stability of POMOF. An aqueous asymmetric supercapacitor equipment assembled with 2-CPE displays remarkable energy density (16.1 Wh kg-1) with power density 1748.9 W kg-1 and durable cyclic stability. The practical application capability as a power supply device can be confirmed by lighting up a red light-emitting diode. Moreover, 2-GCE as H2O2 biosensor reveals a lower detecting limit (0.48 μM), wider linear range (1.43 μM-1.89 mM), high selectivity and reproducibility, which was further demonstrated by detecting H2O2 in real blood serum samples.

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Supplementary files

Article information


Submitted
06 Sep 2020
Accepted
15 Oct 2020
First published
16 Oct 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

3D POMOF based on {AsW12} cluster and Ag-MOF with interpenetrating channels for large-capacity aqueous asymmetric supercapacitors and highly selective biosensors detecting hydrogen peroxide

L. Cui, K. Yu, J. Lv, C. Guo and B. Zhou, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA08759A

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