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CoMoO4 nanobelts as efficient peroxidase mimics for the colorimetric determination of H2O2

Authors
  • Wang, Zhe1, 2
  • Ju, Peng2, 3, 4
  • Zhang, Yu2
  • Jiang, Fenghua2
  • Ding, Haibing1
  • Sun, Chengjun2, 3
  • 1 Ocean University of China, 238 Songling Road, Qingdao, 266100, People’s Republic of China , Qingdao (China)
  • 2 Ministry of Natural Resources (MNR), 6 Xianxialing Road, Qingdao, 266061, People’s Republic of China , Qingdao (China)
  • 3 Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Qingdao, 266237, People’s Republic of China , Qingdao (China)
  • 4 Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, People’s Republic of China , Qingdao (China)
Type
Published Article
Journal
Microchimica Acta
Publisher
Springer-Verlag
Publication Date
Jul 03, 2020
Volume
187
Issue
8
Identifiers
DOI: 10.1007/s00604-020-04376-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

CoMoO4 materials were prepared through a simple hydrothermal method and developed as highly efficient peroxidase mimics for colorimetric determination of H2O2. Based on the different experimental conditions in the synthesis process, the CoMoO4 materials present distinct morphologies, structures, surface properties, and peroxidase mimetic activities. Among them, CoMoO4 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 H2O2 to generate a blue oxide. In view of the excellent peroxidase mimetic catalytic activity of CoMoO4 NBs, a rapid, convenient, and ultrasensitive method was successfully established for the visual and colorimetric determination of H2O2. The method exhibits good selectivity, practicability, stability, and reusability, and has a detection limit of 0.27 μM. The peroxidase mimetic catalytic mechanism of CoMoO4 NBs was illustrated according to the kinetic and active species trapping experiments. The method has a good potential for rapid and sensitive determination of H2O2 for biomedical analysis. Graphical abstractSchematic presentation of the process of CoMoO4 nanobelts catalyzing the oxidation of peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2 to generate a typical blue color, which can be applied in rapid and ultrasensitive detection of H2O2 visually.

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