Electrodeposition-Assisted Rapid Preparation of Pt Nanocluster/3D Graphene Hybrid Nanozymes with Outstanding Multiple Oxidase-Like Activity for Distinguishing Colorimetric …

References

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465Electrodeposition-Assisted Rapid Preparation of Pt Nanocluster/3D Graphene Hybrid Nanozymes with Outstanding Multiple Oxidase-Like Activity for Distinguishing Colorimetric …https://doi.org/10.1021/acsami.9b23546CompositePt nanoclusters (Pt NCs) grafted onto three-dimensional graphene foam (3D GF)

Materials

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465Pt NC/3D GF nanohybridSEMAs shown in Figure 1A, 3D GF displays a regular three-dimensional porous structure, in which the pore diameter is 100–200 μm. The color of the Pt NC/3D GF nanohybrid was deeper than that of pure 3D GF, demonstrating that Pt NC was evenly anchored on 3D GF (Figure 1A inset). The transmission electron microscopy (TEM) images (Figure 1C,D) revealed that interconnected 3 nm Pt nanocrystals formed Pt nanoclusters on the 3D GF.In addition to the high surface area provided by the special 3D macroporous structure of 3D GF (∼850 m2/g bare 3D GF estimated by the Brunauer–Emmett–Teller method(50))

Kinetics

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465Pt NC/3D GF nanohybridOXDTMB0.089mM2.74-7M/s465

Applications

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465Pt NC/3D GF nanohybridDetection of Catechol and HydroquinoneHQColor0.05–1 and 1–50μM10nM95.8-99.6%different concentrations of HQ were spiked in the systems containing CC and then analyzed with the means
465Pt NC/3D GF nanohybridDetection of Catechol and HydroquinoneCatecholColor0.5-800μM50nM
465Pt NC/3D GF nanohybridDetection of Catechol and HydroquinoneHQColor0.05–1 and 1–50μM10nM95.8-99.6%
465Pt NC/3D GF nanohybridDetection of Catechol and HydroquinoneCatecholColor0.5-800μM50nMAs shown in Figure 6, after incubation with the Pt NC/3D GF nanohybrid in pH 7.0 BR buffer at 30 °C for 15 min, the absorbance of the system at 388 nm gradually increased with the increase of catechol concentration.