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

ref title DOI material type comment
4409 1224 The excellent peroxidase-like activity of uniform CuCo 2 O 4 microspheres with oxygen vacancy for fast sensing of hydrogen peroxide and ascorbic acid https://doi.org/10.1039/D0NJ05026A Metal oxide CuCo2O4 microspheres

Materials

ref material size size err size unit size type size comment BET b nanozyme b 10n b unit specific act sa 10n sa unit comment
8249 1224 CuCo2O4 microspheres TEM Furthermore, 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

ref material enzyme type substrate pH T km km err km 10n km unit vmax vmax err vmax 10n vmax unit kcat kcat err kcat 10n kcat unit kcat/km kcat/km 10n kcat/km unit comment
7164 1224 CuCo2O4 microspheres POD TMB 5.0 40 0.1646 mM 63.54 -8 M/s 1224
7163 1224 CuCo2O4 microspheres POD H2O2 5.0 40 0.59 mM 6.83 -8 M/s 1224

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
6103 1224 CuCo2O4 microspheres detection of AA AA Color 1.00-10.00 μM 0.57 μM
6102 1224 CuCo2O4 microspheres detection of H2O2 H2O2 Color 1.00-10.00 mM 132.70 μM