Highly Sensitive and Selective Electrochemical Determination of Sunset Yellow in Food Products Based on AuNPs/PANI‐co‐PoAN‐co‐PoT/GO/Au Electrode

Abstract

A terpolymer poly(aniline‐co‐o‐anisidine‐co‐o‐toluidine)/graphene oxide nanocomposite with a common abbreviation [PANI‐co‐PoAN‐co‐PoT/GO1‐5] was synthesized by the well‐known in situ oxidative polymerization process with ultrasonic assistance. The morphological characteristics were investigated by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Moreover, the complete performance was studied by Fourier transform infrared spectra (FTIR), X‐ray diffraction (XRD), Thermogravimetric analysis (TGA), and electrical conductivity measurements. All nanocomposites displayed a maximum composite degradation temperature (CDTmax) in the range of 295.6‐322.8 °C, which is higher than that shown for the pure terpolymer (295.4 °C). The conductivities of the pure PANI‐co‐PoAN‐co‐PoT and PANI‐co‐PoAN‐co‐PoT/GO1‐5 nanocomposites display conductive behavior. An electrochemical sensor comprising the [PANI‐co‐PoAN‐co‐PoT/GO] nanocomposite and Au nanoparticles was successfully coated onto a gold electrode [AuNPs/PANI‐co‐PoAN‐co‐PoT/GO/Au] through an electrochemical process and was utilized to detect sunset yellow (SY). The electrochemical behavior of the modified electrochemical sensor towards the oxidation of SY was examined by cyclic voltammetry (CV) and square wave voltammetry (SWV). SWV resulted in a linear calibration curve for SY on AuNPs/PANI‐co‐PoAN‐co‐PoT/GO/Au over the range of (5 μM‐500 μM), and the limit of detection was estimated to be 0.0142 μM. These results suggest that the obtained AuNPs/PANI‐co‐PoAN‐co‐PoT/GO/Au was able to detect SY with excellent stability, good selectivity, low detection limit and high sensitivity.

Network structure-based decorated CPA@CuO hybrid nanocomposite for methyl orange environmental remediation

“…The surface morphologies of the CPA (a), N-SWCNT-GO-CE (b), CPA/N-SWCNT-GO-CE (c), and CPA/N-SWCNTS-GO-CE/CuO (d) nanocomposites were studied by field emission scanning electron microscopy, as displayed in Fig. 1 .The SEM micrographs mainly focus on the morphological modifications,which can be noticed on the surface of the samples 43 . The SEM micrographs further provided evidence of the nanocomposite modification 44 .…”

“…Among numerous metal oxides, CuO is one of the appropriate catalysts for this processdue to its photocatalytic activity, reversibility, non-toxicity and physicochemical properties 40 – 42 . In our previous work, we prepared variable types of polymer nanocomposites with amazing properties: sensors, conductivity, and coating 43 – 46 . As a continuation of our previous work, the present work aims to fabricate a nanocomposite of cross-linked CPA with N-SWCNTS-GO-CE and CuO NPs by chemical oxidative copolymerization as effective substances for environmental treatment.…”

Fluorescence Sensing Performance of Carbon Dots of Functionalization toward Sunset Yellow

“…[ 3–6 ] However, if not properly controlled, the aromaticity and azo (NN) of FCF will cause human health problems such as, allergies, asthma, changes in reproductive and neurobehavioral functions and even cancer. [ 7–9 ] FCF in excess have been proven to hurt children's development; where they can stimulate nerves and lead to impaired brain function, mental retardation and other problems. [ 10 ] In China, the maximum amount of FCF used in general food is 0.1 g kg −1 (GB2760‐2011).…”

Developing a potentiometric sunset yellow selective electrode and its applications

“…Therefore, it is very important to adjust the daily intake dosage of sunset yellow and control it. There are advanced techniques that necessitate sophisticated equipment and expensive consumables such as the extraction methods [10][11][12], spectrophotometry [13][14][15], thin layer chromatography [16] high-performance liquid chromatography [17][18][19], capillary electrophoresis [20][21][22] and electrochemical voltammetric methods [23][24][25][26][27][28][29][30][31][32][33] for the quantification of sunset in the literature. The above-mentioned analysis techniques are time-consuming and require sophisticated apparatus, expensive consumables, mostly pretreatment processes and experienced users.…”