▎ 摘　　要

The design of a nanocomposite with electrocatalytic activityandrecyclable development for the detection of small biomolecules andthe removal of environmental pollutants has received enormous attention.A magnetic nanocomposite was synthesized by the hydrothermal approachcomprising two building units: metal-organic frameworks (MOFs)and graphene (GR). GR accumulated organic ligands through the largespecific surface area and cobalt (Co) and nickel (Ni) served as coordinationions to seamlessly connect with the former for forming CoNi-MOFs-GR(CNMs-GR) to improve the conductivity of MOFs and the electrocatalyticactivity of GR. The nanocomposite was utilized to construct an electrochemicalsensing platform for the detection of glucose in human blood serumand the removal of organic dyes (methylene blue (MB), congo red (CR),and neutral red (NR)) in water. The CNMs-GR-modified electrodeexhibited good electrochemical performance toward glucose in a widelinear range of 10-2900 mu M with a detection limit of1.27 mu M. The maximum uptake capacity of CNMs-GR for MB,CR, and NR was 184.29, 912.47, and 894.36 mg/g, respectively. Mostobviously, this work provided a strategy for the design of an effectivebifunctional nanocomposite, which not only demonstrated the enormouspotential for detection of glucose but also realized the removal oforganic dyes.