Co3O4@ β-cyclodextrin with synergistic peroxidase-mimicking performance as a signal magnification approach for colorimetric determination of ascorbic acid

References

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150Co3O4@ β-cyclodextrin with synergistic peroxidase-mimicking performance as a signal magnification approach for colorimetric determination of ascorbic acidhttps://doi.org/10.1016/j.snb.2019.127106Metal oxideCo3O4@β-cyclodextrin nanoparticles

Materials

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BET
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150Co3O4@β-CD NPs10nmTEMThe morphology of Co3O4@β-CD NPs showed well dispersed nanoparticles in the size of 10 nm.

Kinetics

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150Co3O4 NPsPODTMB0.25mM1.85-8M/s1502M-1 s-1
150Co3O4@β-CD NPsPODH2O21.42mM2.85-8M/s150150
150Co3O4 NPsPODH2O25.17mM1.79-8M/s150150
150HRPPODH2O21.59mM10.99-8M/s150
150HRPPODTMB0.52mM8.54-8M/s150
150Co3O4@β-CD NPsPODTMB0.17mM2.81-8M/s1503M-1 s-1150

Applications

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150Co3O4@β-CD NPsdetection of L-Ascorbic acidL-Ascorbic acidColor0.01-0.6mM1.09μM96.8% - 113.0%Besides, in order to investigate the precision of Co3O4@β-CD NPs detection method, recovery experiments were made by adding a serious of AA solution with different concentration. As shown in Table S3, the average recovery of all the samples was range from 96.8% to 113.0%.
150Co3O4@β-CD NPsdetection of L-Ascorbic acidL-Ascorbic acidColor0.01-0.6mM1.09μM96.8% - 113.0%
150Co3O4 NPsdetection of L-Ascorbic acidL-Ascorbic acidColor0.01-0.35mM3.91μM