Nghiên cứu tổng hợp CoFe2O4/rGO và ứng dụng làm vật liệu điện cực phân tích dư lượng kháng sinh ciprofloxacin trong nước thải nuôi trồng thủy sản

Abstract

In the present study, CoFe₂O₄/reduced graphene oxide (CoFe₂O₄/rGO) has been synthesized. The morphology and structure of nanocomposites CoFe₂O₄/rGO were characterized by X-ray diffraction (XRD), Energy Dispersive X-Ray spectrometer (EDX), scanning electron microscopy (SEM), and Fourier Transform infrared spectroscopy (FTIR). The CoFe₂O₄/rGO modified graphite paste electrode (GPE-CoFe₂O₄/rGO) was prepared and used for the electrochemical detection of ciprofloxacin (Cip) antibiotic residues. A Cip analytical method formed under the optimal conditions had a good linear relationship between the Cip signal with its concentration range from 0.5 to 100 µM (R² = 0.991). The limit of detection and quantity was observed as 0.094 µM and 0.314 µM, respectively. Finally, Cip concentration in aquaculture wastewater samples was determined by the proposed method with recovery = 93.7–101.0%.