Preparation, characterization, and electrochemical performances of graphene/Ni(OH)_2 hybrid nanomaterials

摘要

Graphene-based hybrid nanomaterials have recently been investigated and proposed as a promising platform for electronic, optoelectronic, and electrochemical devices because of their high-surface area, remarkable chemical stability, and electrical conductivity. In this study, we demonstrated a facile method for the preparation of graphene/Ni(OH)_2 hybrid nanomaterials. First, polymer-functionalized graphene oxide (PGO) was prepared by Cu(I)-catalyzed click coupling of alkyne-functionalized graphene oxide with azide-terminated poly(vinylpyrrolidone). Subsequently, Ni(OH)_2 nanoparticles were deposited onto graphene nanosheets using PGO as a template. Upon reduction with NaBH_4, graphene/Ni(OH)_2 hybrid nanostructures were constructed. The as-prepared graphene/Ni(OH)_2 hybrid nanosheets were directly immobilized onto the surface of glassy carbon electrode for glucose determination. The as-fabricated nonenzymatic glucose sensor exhibited a wider linearity range from 0.3 to 750 μM with a detection limit of 30 nM (S/N = 3).