Hydrothermal Synthesis of Rare-earth Ferrate for Electrochemical Detection of 4-Aminophenol in Food Samples and Products

Abstract

4-Aminophenol (4-APL/4-AP) is one of the toxic chemicals in the water sources. The electrochemical oxidation of 4-APL reaction was studied by electrochemical method with SPCE modified with perovskite rare-Earth ferrate (PrFeO₃). The nanomaterials were characterize using various morphological analysis by TEM, XRD, FTIR, Raman, XPS. PrFeO₃ needles modified SPCE demonstrated excellent electrocatalytic performance towards the electrooxidation of 4-APL under pH 7.0, having anodic peak current significantly higher than those of the bare SPCE. Using CV and amperometry method to analyse the sensor performance toward 4-APL detection. In CV, the synthetic sensor plays wide 4-APL detection range from 100–500 μM. In amperometry method, the sensor plays wide range of 4-APL detection from 0.03 to 1859 μM and the limit of detection is 0.014 μM. Mainly the proposed sensor material of PrFeO₃/SPCE exhibit an excellent 4-APL detection carrying out in various food samples. Furthermore, regarding 4-APL analysis, PrFeO₃/SPCE demonstrate outstanding selectivity, low limit of detection, repeatability, reproducibility, and operational stability.