The excellent peroxidase-like activity of uniform CuCo 2 O 4 microspheres with oxygen vacancy for fast sensing of hydrogen peroxide and ascorbic acid

References

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1224The excellent peroxidase-like activity of uniform CuCo 2 O 4 microspheres with oxygen vacancy for fast sensing of hydrogen peroxide and ascorbic acidhttps://doi.org/10.1039/D0NJ05026AMetal oxideCuCo2O4 microspheres

Materials

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1224CuCo2O4 microspheresTEMFurthermore, as displayed in Fig. 2b and c, CuCo2O4 microspheres are composed of peasecod-like strips with ca. 100 nm assembled by lots of nanoparticles with ca. 10 nm (Fig. 2d and e); the rough surface with more exposed active sites31 is more conducive to adsorbing more hydrogen peroxide molecules and enhancing catalytic performance during the catalytic reaction in the subsequent experiment. The HRTEM image (the inset of Fig. 2e) reveals that the lattice spacing is 0.24 nm, consistent with the value for the (311) plane of the cubic CuCo2O4 phase.

Kinetics

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1224CuCo2O4 microspheresPODTMB5.0400.1646mM63.54-8M/s1224
1224CuCo2O4 microspheresPODH2O25.0400.59mM6.83-8M/s1224

Applications

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1224CuCo2O4 microspheresdetection of AAAAColor1.00-10.00μM0.57μM
1224CuCo2O4 microspheresdetection of H2O2H2O2Color1.00-10.00mM132.70μM