| Summary: | In this work, we report the synthesis of Cu-Ag bimetallic nanopartiles and g-C<sub>3</sub>N<sub>4</sub> nanosheets decorated on zeolitic imidazolate framework-8 (ZIF-8) to form a Cu-Ag/g-C<sub>3</sub>N<sub>4</sub>/ZIF hybrid. The hybrid was synthesized and characterized by Transmission electron microscopy (TEM), Fourier transformed infrared (FTIR), the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Cu-Ag/g-C<sub>3</sub>N<sub>4</sub>/ZIF hybrid has intrinsic peroxidaselike catalytic activity towards the oxidation of TMB in the presence of H<sub>2</sub>O<sub>2</sub>. The situ synthesis of Cu-Ag bimetallic nanopartiles on 2D support such as g-C<sub>3</sub>N<sub>4</sub> nanosheets would significantly enhance the peroxidaselike catalytic properties of individual Cu-Ag bimetallic nanopartiles and the g-C<sub>3</sub>N<sub>4</sub> nanosheets. After loading of Cu-Ag bimetallic nanopartiles and g-C<sub>3</sub>N<sub>4</sub> nanosheets on the ZIF-8, the hybrids exhibited superior peroxidaselike catalytic activity and good recyclability. Then, this method was applied for detecting glucose in human serum, owing the significant potential for detection of metabolites with H<sub>2</sub>O<sub>2</sub>-generation reactions.
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