A Colorimetric Aptamer Sensor Based on the Enhanced Peroxidase Activity of Functionalized Graphene/Fe3O4-AuNPs for Detection of Lead (II) Ions

References

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title
DOI
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694A Colorimetric Aptamer Sensor Based on the Enhanced Peroxidase Activity of Functionalized Graphene/Fe3O4-AuNPs for Detection of Lead (II) Ionshttps://doi.org/10.3390/catal10060600Compositegraphene/Fe3O4-AuNPs

Materials

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BET
b nanozyme
b 10n
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sa 10n
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694graphene/Fe3O4-AuNP50-70nmTEMThe prepared amine magnetic beads were characterized by TEM, FTIR, and XRD. Figure 3a is the TEM image of the amine magnetic beads. It indicates that the prepared magnetic beads have a particle size of 50 to 70 nm and good dispersibility

Kinetics

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vmax 10n
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Applications

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linear range
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694graphene/Fe3O4-AuNPdetection of Pb2+Pb2+Color1–300ng/mL0.63ng/mL