Screen-Printed Electrode Surface Modification with NiCo2O4/RGO Nanocomposite for Hydroxylamine Detection

Abstract

We developed a novel hydroxylamine sensor through the surface modification of screen-printed electrode (SPE) with NiCo2O4 nanoparticles/reduced graphene oxide (RGO) nanocomposite (NiCo2O4/RGO/SPE). We assessed the electrochemical response of hydroxylamine on the as-fabricated sensor, confirming the high electrocatalytic impact of hydroxylamine oxidation. The electrode produced sensitively responded to hydroxylamine under optimized conditions, with a low limit of detection (2.0 nM) and broad linear dynamic range (0.007–385.0 µM). The presence of NiCo2O4 combined with the modification of RGO resulted in sensitive detection and signal amplification of hydroxylamine oxidation. The proposed sensor was used to determine the existence of hydroxylamine in water samples.

Determination of Paracetamol on Electrochemically Reduced Graphene Oxide–Antimony Nanocomposite Modified Pencil Graphite Electrode Using Adsorptive Stripping Differential Pulse Voltammetry

“…The modification of graphene with SbNPs has been shown to provide great prospects for new functions in sensing, energy, and other applications due to the advantageous synergistic effects of the component materials, thereby expanding the application area of graphene [ 21 ]. The synergistic effect of graphene with platinum group, noble, and other nanomaterials has been widely explored in the literature in diverse contexts [ 22 , 23 ]. Piovesan et al proposed a modified glassy carbon electrode based on an rGO and AuNPs nanocomposite for the determination of endocrine disruptor, methylparaben [ 22 ].…”

“…Piovesan et al proposed a modified glassy carbon electrode based on an rGO and AuNPs nanocomposite for the determination of endocrine disruptor, methylparaben [ 22 ]. A screen printed electrode surface was modified with an NiCo 2 O 4 /rGO nanocomposite, which was used to detect hydroylamine [ 23 ], among others. Electrodes based on reduced graphene oxide modified with SbNPs have previously been studied for the detection of organic compounds [ 21 , 24 ].…”

Voltammetric Determination of Isoniazid in the Presence of Acetaminophen Utilizing MoS2-Nanosheet-Modified Screen-Printed Electrode

“…Screen-printing electrodes (SPEs) have been extensively employed for the mass-production of disposable electrochemical sensing systems [ 16 ]. The SPEs are affordable with the capability for mass production while maintaining sufficient reproducibility, with advantages of versatility and miniaturization [ 17 , 18 , 19 , 20 , 21 ]. The electrocatalytic activity of the bare electrode displays very substandard behavior [ 22 ].…”

A sensitive Cu(salophen) modified screen-printed electrode for simultaneous determination of dopamine and uric acid

“…Recently, authors have increasingly focused on nanostructured materials, such as nanomaterials, nanoparticles, nanowires, and nanotubes, because of their specific physicochemical features, which may offer a prominent and functional ground for electroanalysis, especially when designing modified electrodes for electrochemical sensing [34][35][36][37][38][39][40][41][42].…”