查看文章

This paper describes the synthesis, characterization and application of amorphous nickel (II) hydroxide particles, α-Ni(OH)₂, onto a hybrid material composed of silica and graphene oxide, SiO₂/GO. The sol-gel process using HF as the catalyst was used to obtain this organic-inorganic matrix. The Ni(OH)₂ were prepared directly on the surface of the matrix using nickel (II) acetate and N,N-dimethylformamide (DMF) as a solvent. The SiO₂/GO/Ni(OH)₂ material was characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. A glassy carbon electrode modified with the SiO₂/GO/Ni(OH)₂ material was used in the development of a sensitive electrochemical sensor for the determination of vitamin D₃ by pulse differential voltammetry. A well-defined electro …