NiO nanoparticles -decorated conductive polyaniline nanosheets for amperometric glucose biosensor

At present tuneable properties and morphology of polymer composites have become fundamental forefront research interest in sensing applications. Using existing approaches with a new idea, this paper reports the synthesis of Polyaniline nanosheets (PANINS) with surface modification by nickel oxide nanoparticles (NiO) through in situ polymerization. The morphology and presence of functional groups of as obtained NiO-NPs @PANINS witnessed the formation of the thin surface of PANINS decorated by NiO-NPs using FESEM, TEM, and FTIR. The structural analysis of as prepared NiO-NPs and NiO-NPs@PANINS confirmed the crystallinity by insignificant stacking fault, dislocation density, and microstrain. Furthermore, the synthesized NiO and NiO@PANINS were used as a modified screen-printed electrode (SPE) for the fabrication of electrochemical non-enzymatic glucose sensor. The invented sensor used for amperometric non-enzymatic glucose sensor exhibited a high sensitivity of 5625 μA mM−1 cm−2, and low detection limit 0.06 μM. Besides that, the interference study shows excellent selectivity and also retains good stability. We believe that this NIO@PANINS nanocomposite could be utilized as low cost, an eco-friendly efficient electrode for the electrochemical biological sensor. [Display omitted] •The NiO-NPs@PANINS was synthesized using SDS through in-situ polymerization method.•The NiO-NPs@PANINS/SPE used for non-enzymatic glucose sensing in 0.1 M NaOH. .•The NiO-NPs@PANINS/SPE showed a high sensitivity of 5625 μAmM−1cm−2 & LOD 0.06 μM.•NiO-NPs@PANINS/SPE was better for its selectivity, ease of synthesis and lowcost.