Electrochemical sensor for determination of hydroxylamine using functionalized Fe3O4 nanoparticles and graphene oxide modified screen-printed electrode

A simple strategy for determination of hydroxylamine based on Fe3O4 nanoparticles function­nalized by [2-(4-((3-(trimethoxysilyl)propylthio)methyl)1-H1,2,3-triazol-1-yl)acetic­acid] (FNPs) and graphene oxide (GO) modified screen-printed electrode (SPE), denoted as (Fe3O4 FNPs/GO/SPE), is reported. The electrochemical behavior was investigated at Fe3O4FNPs/GO/SPE cyclic voltammetry (CV), differential pulse (DPV) chro­noamperometry (CHA) techniques in phosphate buffer solution (pH 7.0). FNPs/GO/SPE a novel sensor exhibited catalytic activity toward the oxidation hydroxyl­ami­ne. potential shifted to more negative potentials, its peak current increased electrode, also indicating that under these conditions, process irreversible. electrocatalytic hydroxyl­amine showed good relationship concentration range 0.05–700.0 μM, with detection limit 10.0 nM. proposed applied water samples, too.