Composite Nanoarchitectonics with Polythiophene, MWCNTs-G, CuO and Chitosan as a Voltammetric Sensor for Detection of Cd(II) Ions

In this study, we describe an electrochemical method for detecting Cd(II) ions, utilizing a glassy carbon electrode (GCE) modified with polythiophene (PTH)/multi-walled carbon nanotubes with grapheme (MECNTs-G), chitosan (CS), and CuO. The PTH/ MWCNTs- G/CS/CuO was prepared via an in situ oxidative polymerization route. XRD and FT-TR analysis confirmed that the nanocomposites were successfully prepared. TEM, SEM, EDX, TGA, and DTG were utilized to study the morphological and thermal properties of the newly synthesized materials. The electrochemical detection of Cd(II) was achieved by CV and SWV. The cadmium ions exhibited a linear relationship at concentrations of 30-0.01 mu M with the PTH/MWCNTs-G/CS/CuO/GCE. The limit of detection and limit of quantification were found to be 0.014 and 0.049 mu M, respectively. The stability, selectivity, and reproducibility of the modified electrode were also studied. Good recovery was achieved for the practical application of PTH/MWCNTs-G/CS/CuO/GCE in a tap-water sample.

Automated summary

This study introduces an electrochemical method for detecting Cd(II) ions using a modified glassy carbon electrode, and successfully prepared nanocomposites were characterized using various techniques. The modified electrode showed good stability, selectivity, and reproducibility, with practical applications demonstrated in tap-water samples.