Nanoengineering of new cost-effective nanosensor based on functionalized MWCNT and Ag nanoparticles for sensitive detection of BPA in drinking water

Autor: Najib Ben Messaoud, Cherif Dridi, Menyar Ben Jaballah
Rok vydání: 2021
Předmět:
Zdroj: Applied Physics A. 127
ISSN: 1432-0630
0947-8396
Popis: A novel nanosensor for the detection of bisphenol A (BPA) in drinking water has been developed using functionalized multiwalled carbon nanotube (f-MWCNT)- and silver nanoparticles (AgNPs)-modified glassy carbon electrode (GCE). Functionalized and unfunctionalized MWCNT were characterized by Fourier transform infrared spectroscopy (FTIR) and Energy-Dispersive X-ray Analysis (EDAX). Morphological characterization of f-MWCNT and AgNPs/f-MWCNT was investigated by Transmission Electron Microscopy (TEM). The electrochemical behavior of the developed sensor toward BPA was examined by Cyclic Voltammetry (CV). The equivalent electrical circuit was demonstrated using Electrochemical Impedance Spectroscopy (EIS). Several important parameters controlling the performance of the sensor were investigated, such as the different numbers of deposited AgNPs layers, the effect of the scan rate, and the influence of the pH. Under optimized measurement conditions, the sensor showed a wide linear range response of BPA (70 nM–6000 nM) and a low limit of detection (LOD) of 40 nM. AgNPs/f-MWCNT/GCE sensor shows high stability, reproducibility, repeatability, and selectivity. The proposed procedure was successfully applied to detect BPA in drinking water with satisfactory recovery data results.
Databáze: OpenAIRE
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