An optimized chemically modified electrode based on copper oxide nanorods for the quantification of chemical oxygen demand in wastewater
Year: 2025
Type: article
Abstract: The present research has used newly prepared copper nanorods (CuONRs) and Chitosan or Nafion polymer, to develop an inorganic–organic-organic matrix-based modified glassy carbon electrode (Chit-CuONRs/GCE or Naf-CuONRs/GCE), as a sensing architecture for chemical oxygen demand (COD) determination in wastewater. The electrocatalytic behavior of the CuONRs in the electrode matrix was investigated by linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and amperometry measurements. Furthermore, by using a Box-Behnken response surface experimental design technique, the preparation of the composition of the modifying matrix was optimized. The analytical parameters of the optimized modified electrode (i.e., a large linear domain of the calibration curves against glucose, low LOD, good repeatability and reproducibility) have enhanced values compared with an unoptimized one. Overall, CuONRs from the inorganic–organic matrix of the modified electrode serve as a very efficient electrocatalyst in wastewater analysis, with a recovery percentage equal to 95.65%, when compared with a standardized method.
Institutions: Escuela Superior Politécnica del Chimborazo, Babeș-Bolyai University, Autonomous University of San Luis Potosí, University of Pannonia, Secretaría de Ciencia, Humanidades, Tecnología e Innovación, Research Institute for Analytical Instrumentation, National Institute of Research and Development for Optoelectronics
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,550
Awards: G2995378071, G834290898
OpenAlex ID: W4411116918