4-nitrophenol detection in water sample using linear sweep voltammetry with f-multi walled carbon nanotubes modified electrode

Abstract

In this era, we report active carbon source (f-MWCNTs) with more electrode active surface area (EASA). The EASA is a significant role in batteries, supercapacitors and sensor application. Herein, we proposed modified electrode (GCE/f-MWCNTs) in the application of a sensor for the detection of 4-NP. The structural defects and morphological analysis were characterized by Raman spectroscopy and transmission electron microscopy (TEM), respectively. Moreover, the electron transfer properties of the modified electrode (GCE/f-MWCNTs) were analyzed by using Electrochemical Impedance Spectroscopy (EIS). The electrochemical sensor was developed based on prepared f-MWCNTs on a glassy carbon electrode (GCE). The electrocatalytic activity of (GCE/f-MWCNTs) modified electrode evaluated by the determination of 4-NP on cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The proposed sensor exhibited good electrocatalytic activity towards the determination 4-NP in a water sample. In addition, the real sample analysis was carried out in laboratory tap water and obtained an acceptable recovery rate (97%), respectively.