CoMoO4 nanobelts as efficient peroxidase mimics for the colorimetric determination of H2O2
CoMoO 4 materials were prepared through a simple hydrothermal method and developed as highly efficient peroxidase mimics for colorimetric determination of H 2 O 2 . Based on the different experimental conditions in the synthesis process, the CoMoO 4 materials present distinct morphologies, structure...
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Published in | Mikrochimica acta (1966) Vol. 187; no. 8; p. 424 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Vienna
Springer Vienna
01.08.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | CoMoO
4
materials were prepared through a simple hydrothermal method and developed as highly efficient peroxidase mimics for colorimetric determination of H
2
O
2
. Based on the different experimental conditions in the synthesis process, the CoMoO
4
materials present distinct morphologies, structures, surface properties, and peroxidase mimetic activities. Among them, CoMoO
4
nanobelts (NBs) display the best intrinsic peroxidase mimetic abilities due to the high-energy (100) facet exposed, more Co active sites at (100) facet, more negative potential, and larger specific surface area. It can efficiently catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H
2
O
2
to generate a blue oxide. In view of the excellent peroxidase mimetic catalytic activity of CoMoO
4
NBs, a rapid, convenient, and ultrasensitive method was successfully established for the visual and colorimetric determination of H
2
O
2
. The method exhibits good selectivity, practicability, stability, and reusability, and has a detection limit of 0.27 μM. The peroxidase mimetic catalytic mechanism of CoMoO
4
NBs was illustrated according to the kinetic and active species trapping experiments. The method has a good potential for rapid and sensitive determination of H
2
O
2
for biomedical analysis.
Graphical abstract
Schematic presentation of the process of CoMoO
4
nanobelts catalyzing the oxidation of peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H
2
O
2
to generate a typical blue color, which can be applied in rapid and ultrasensitive detection of H
2
O
2
visually. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0026-3672 1436-5073 |
DOI: | 10.1007/s00604-020-04376-7 |