Covalent Bonded Graphene/Neutral Red Nanocomposite Prepared by One‐step Electrochemical Method and its Electrocatalytic Properties Toward Uric Acid.

Abstract: A nanocomposite Graphene/Neutral Red (GNR) was fabricated via a facile electrochemical method by reducing graphene oxide (GO) and covalent bonding with NR on glassy carbon electrode (GCE) in one step. The bond between NR and graphene was characterized and demonstrated by X‐Ray Diffraction (XRD), X‐ray Photoelectron Spectroscopy (XPS), UV‐vis, Fourier Transform Infrared (FT‐IR). Electrochemical data revealed that the GNR resulted in a sensitivity enhancement of uric acid (UA) oxidation and CV curve shown that the catalytic oxidation current is linearly dependent on UA concentration in the range of 0.5–50 μM and 50 μM−2 mM with a detection limit of 0.076 μM (S/N=3). The existing ions and physiological interferents were tested and they were nearly negligible or have a very small influence. Moreover, 2 weeks stability was obtained. By compared with other UA sensor, the present method is simple than previous report and the performance is better. [ABSTRACT FROM AUTHOR]