A Facile Glycerol-Assisted Synthesis of Low-Cu2+-Doped CoFe2O4 for Electrochemical Sensing of Acetaminophen

Abstract

This work devised a simple glycerol-assisted synthesis of a low-Cu2+-doped CoFe2O4 and the electrochemical detection of acetaminophen (AC). During the synthesis, several polyalcohols were tested, indicating the efficiency of glycerin as a cosolvent, aiding in the creation of electrode-modifier nanomaterials. A duration of standing time (eight hours) before calcination produces a decrease in the secondary phase of hematite. The synthesized material was used as an electrode material in the detection of AC. In acidic conditions (pH 2.5), the limit of detection (LOD) was 99.4 nM, while the limit of quantification (LOQ) was found to be (331 nM). The relative standard deviation (RSD), 3.31%, was computed. The enhanced electrocatalytic activity of a low-Cu2+-doped CoFe2O4-modified electrode Cu0.13Co0.87Fe2O4/GCE corresponds extremely well with its resistance Rct, which was determined using the electrochemical impedance spectroscopy (EIS) technique and defined its electron transfer capacity. The possibility of a low-Cu2+-doped CoFe2O4 for the electrochemical sensing of AC in human urine samples was studied. The recovery rates ranging from 96.5 to 101.0% were obtained. These findings suggested that the Cu0.13Co0.87Fe2O4/GCE sensor has outstanding practicability and could be utilized to detect AC content in real complex biological samples.

A Novel Rhodamine B Derivative as a “Turn-on” Fluorescent Probe for Cu 2+ with High Selectivity and Sensitivity

“…The fundamental research on Cu 2+ detection is crucial to environmental monitoring and biological research. Up to now, many detection methods for Cu 2+ have been developed, such as inductively coupled plasma mass spectrometry [2], electrochemical methods [3], surface-enhanced Raman scattering [4], colorimetric and/or fluorescent chemosensors [5][6][7][8][9][10]. In contrast, fluorescence detection has become appealing, due to simple instrumentation, cost-efficiency, fast and high sensitivity [6][7][8][9][10].…”