Synthesis, Characterization, and Electrochemical Properties Study of aNovel Polyoxotungstate/Metal-Organic Framework/MWCNTs-COOH NanohybridMaterial

Polyoxometalates (POMs) are a large group of metal-oxygen cluster anions that have uniquestructural and electronic characteristics[۱,۲]. Therefore they have many applications in variousfields[۱].One of the essential applications of POMs, specially Keggin-type POMs, is in theelectrochemistryfield[۲].The stability of these compounds in aqueous environment and withincreasing pH decreases[۳].These characteristics limit the analytical application of thesecompounds. Therefore, in this research, in order to overcome this limitation, a hybridcomposition based on polyoxometalate stabilized on the surface of multi-walled carbonnanotubes (SiW۱۱Co@Cu-BTC/MWCNTs-COOH) was designed and prepared. ThenSiW۱۱Co@Cu-BTC/MWCNTs-COOHnano-hybrid material was characterized by variousmethods such as Fourier transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), andtransmission electron microscopy (TEM). Then the surface of the glassy carbon electrode wasmodified by this nano-hybrid compound during two stages of drop-casting and thenelectrochemical reduction method. The surface morphology, and electrochemical properties ofthe SiW۱۱Co@Cu-BTC/MWCNTs-COOH/GCE were evaluated by field emission scanningelectron microscope/EDS (FE-SEM/EDS), and voltammetry techniques.

کلیدواژه ها:

Polyoxometalate (POM) ، Metal-Organic Framework (MOF) ، MWCNTs-COOH ، Nano-hybrid materials ، Electrochemical Properties