Efficient nitrite detection with single-step synthesized Y/BaO-fMWCNT nanocomposite by electrochemical approach

In this approach, modified glassy carbon electrode (GCE) with Y/Ba-functionalized MWCNT nanocomposite was fabricated for the sensitive electrochemical detection of nitrite in a room conditions. Initially, nanocomposite of Y₂O₃/BaO-fMWCNT (i.e., Y/Ba-fMWCNT) was prepared by using the single-step solid-state technique. Using UV–vis., FTIR, SEM, TEM, EDS, XRD and XPS techniques, it was fully characterized the synthesized Y/Ba-fMWCNT nanocomposite in terms of their optical (band-gap energy), functional, morphological, binding-energies, elemental, crystalline, and structural features. Differential pulse voltammetry (DPV) and cyclic voltammetry (CV) were elaborately used to assess the electrochemical behaviors of the as-calcined Y/Ba-fMWCNT/GCE toward nitrite chemical in a room conditions. The oxidation peak at +0.1 V as well as the higher current responses were found by increasing the nitrite concentration in the electrochemical oxidation that detection under optimized conditions and compared the bare-GCE and Y₂O₃/BaO modified-GCEs. We looked at how the pH and scan rates are affected in sensor analytical parameters. The relationship between the oxidation peak current and the concentration of nitrite shows a linear relationship under ideal circumstances, with the concentration range (0.35–1.20 μM). The limit of detection was found to be 0.297 μM (S/N = 3). The sensor's dependability in detecting nitrite in ambient water samples was assessed with a recovery ranges (99–100 %). The sensor also offers a lot of benefits, such as being easy to prepare, responding quickly, being very sensitive, and having remarkable reproducibility. For future uses, it could be useful in identifying different types of carcinogenic targets using inorganic‑carbon nanocomposite by electrochemical approaches for the safety of environmental and healthcare fields in a broad scale.