Construction of polyfluorinated azobenzene/niobate Type-B nanocomposite for simultaneous electrochemical detection of ascorbic acid and uric acid

Abstract

Polyfluorinated azobenzene/niobate type-B nanocomposite (C3F7-azo+-Nb6O17) was synthesized using a traditional guest-guest exchange method. The structure, morphology and chemical composition characterization, such as X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectrometer (EDS) and Fourier transform infrared spectrometer (FTIR), indicated that C3F7-azo+ ions were inserted into [Nb6O17]4- laminates forming a bimolecular layer with an angel of 48.48°. Afterwards, the electrochemical performances of C3F7-azo+-Nb6O17/GCE were investigated by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The consequences suggested that C3F7-azo+-Nb6O17/GCE could detect simultaneously AA and UA, and the detection limit of AA and UA were 3.64 and 1.36 μM, respectively. Furthermore, C3F7-azo+-Nb6O17/GCE had some good performances, such as reproducibility, stability and anti-interference.