Abstract
In this work, we report the synthesis of Cu-Ag bimetallic nanopartiles and g-C3N4 nanosheets decorated on zeolitic imidazolate framework-8 (ZIF-8) to form a Cu-Ag/g-C3N4/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-C3N4/ZIF hybrid has intrinsic peroxidaselike catalytic activity towards the oxidation of TMB in the presence of H2O2. The situ synthesis of Cu-Ag bimetallic nanopartiles on 2D support such as g-C3N4 nanosheets would significantly enhance the peroxidaselike catalytic properties of individual Cu-Ag bimetallic nanopartiles and the g-C3N4 nanosheets. After loading of Cu-Ag bimetallic nanopartiles and g-C3N4 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 H2O2-generation reactions.
Highlights
Nanozymes have attracted increasing attention in the past decades in the field of catalysis because of their fantastic advantages, including low cost, facile synthesis, excellent stability and are easy to manipulate in optical sensing [1,2]
After the Fe3 O4 nanoparticles was first reported as the peroxidaselike nanoenzyme to catalyze 3,30,5,50 -tetramethylbenzidine (TMB) in the presence of H2 O2 to produce a blue color compound 3,30,5,50 -tetramethylbenzidine diimine (TMBDI) [3], different kinds of nanozymes such as carbon based nanomaterials [4], metal nanoparticles [5,6], metal oxides [7,8] and metal oxide nanocomposites [9,10] have been discovered to replace natural enzymes
The alloy nature of Cu-Ag/g-C3 N4 /ZIF hybrid is confirmed by the appearance of clear lattice alloy nature of Cu-Ag/g-C
Summary
Nanozymes have attracted increasing attention in the past decades in the field of catalysis because of their fantastic advantages, including low cost, facile synthesis, excellent stability and are easy to manipulate in optical sensing [1,2]. Coupling of the catalyst oxides [15,16],tometals [17], nanoparticles [18], sulfide [19,20] and [21,22] is an effectivebimetallic method tonanopartiles improve the catalytic. Cu-Ag bimetallic nanoparticles have been proved to decorate on reduced graphene oxide Cu-Ag bimetallic nanoparticles have been proved to decorate on reduced graphene oxide nanosheets as peroxidase mimic for glucose and ascorbic acid detection [24]. ZIF-8 have been recently investigated as supporters to reduce the consumption rate of nanosheets. After loading of Cu-Ag bimetallic nanopartiles and g-C3N4 nanosheets on the ZIF-8, the hybrids exhibited superior peroxidaselike catalytic activity and good recyclability. The ZIF-8, the hybrids exhibited superior peroxidaselike catalytic activity and good recyclability
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