Clay-based graphite sensor for electrochemical determination of paranitrophenol in water samples. (December 2022)

• Record Type: Journal Article
• Authors: El Bouabi, Y.; Loudiki, A.; Matrouf, M.; Akbour, R. Ait; Laghrib, F.; Farahi, A.; Bakasse, M.; Saqrane, S.; Lahrich, S.; EL Mhammedi, M.A.
• Is Part Of: Case studies in chemical and environmental engineering. Volume 6(2022)
• Publication Date: 2022-12
• Subjects: Environmental pollution -- Electrochemical sensors -- Pesticides -- Electroanalysis -- Real sample; Chemical engineering -- Periodicals; Environmental engineering -- Periodicals; Environmental chemistry -- Periodicals; 628.05
• DOI: 10.1016/j.cscee.2022.100225
• Languages: English
• ISSNs: 2666-0164

Abstract

Abstract: The electrochemical reduction of paranitrophenol (4-NP) has been studied on a carbon paste electrode (CPE) modified with Clay microparticles (Clay-CPE) using cyclic and differential pulse voltammetry. The clay microparticles were synthesized by exploring a new source from Akrach area situated in the west north, Morocco. Physicochemical characterization of the prepared clay was carried out using X−ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), energy dispersive X−ray analysis (EDX), and Fourier transform-infrared spectroscopy (FT−IR). During electrochemical measurements, the reduction current of 4−NP was much higher at Clay−CPE in Britton Robinson buffer solution (BR, pH2). 4-NP yields a well-defined reduction peak at Epc = −0.74 V which gradually increases in height with the concentration of the analyte in the range from 1.0 × 10 −5 mol L −1 to 1.0 × 10 −3 mol L −1 with a detection limit (DL) of 1.50 × 10 −6 mol L −1 . The Clay−CPE has been used successfully for the determination of 4−NP in water samples.