Bisphenol A Imprinted Electrochemical Sensor Based on Graphene Quantum Dots with Boron Functionalized g-C3N4 in Food Samples

Abstract

A molecular imprinted electrochemical sensor based on boron-functionalized graphitic carbon nitride (B-g-C3N4) and graphene quantum dots (GQDs) was presented for selective determination of bisphenol A (BPA). In particular, by combining the selectivity and high stability properties, which are the most important advantages of molecular imprinted polymers, and the highly sensitive properties of GQDs/B-g-C3N4 nanocomposite, a highly selective and sensitive analytical method was developed for BPA analysis. Firstly, GQDs/B-g-C3N4 nanocomposite was characterized by using microscopic, spectroscopic, and electrochemical techniques. This novel molecular imprinted electrochemical sensor for BPA detection demonstrated a linearity of 1.0 × 10−11–1.0 × 10−9 M and a low detection limit (LOD, 3.0 × 10−12 M). BPA-imprinted polymer on GQDs/B-g-C3N4 nanocomposite also showed good stability, repeatability and selectivity in food samples.

Carbon-Based Enzyme Mimetics for Electrochemical Biosensing

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Smartphone-Integrated Molecularly Imprinted Ratiometric Fluorescent Sensor for Selective and Visual Detection of Doxycycline in Lake Water and Foodstuff

“…Synthesized molecularly imprinted polymers (MIPs) are effective substitutes for natural receptors owing to their binding cavities that are complementary to the template molecules . With the merits of favorable stability, durability, and easy fabrication and storage, MIPs have found extensive applications in catalysis, drug delivery, sensors, and other fields . For now, many researchers have combined MIPs with LMOFs. , LMOFs@MIPs composites not only possess the advantages of simple synthesis, superior stability, strong affinity, as well as satisfactory selectivity but also offer the appealing merits of fast mass transfer rate, favorable detection sensitivity, and large binding capacity. , …”

Electrochemical detection and catalytic reduction of nitrobenzene using a bimetallic NiS2/Fe3S4 magnetic heterostructure: an innovative approach for environmental remediation

“…The resulting synergy enhances sensitivity, selectivity, versatility, and overall performance, making these structures pivotal for the advancement of electrochemical sensing technology. A variety of hybrid heterostructures have been utilized for electrochemical detection of various pollutants, including the GQDs/B- g -C 3 N 4 22 nanocomposite used for bisphenol detection, MnCO 3 NS/CF 23 for determination of ochratoxin A, the g-C 3 N 4 NS/BSA@MnO 2 24 nanocomposite for zearalenone, the WS 2 NFs/N,B-GR 25 heterostructure for analysis and detection of l -phenylalanine in milk samples, the GQDs–NiAl 2 O 4 26 nanocomposite for the selective determination of 5-hydroxymethyl furfural in coffee samples, the NiFe 2 O 4 @Gr 27 nanocomposite for determination of butylated hydroxy anisole, CdMoO 4 /g-C 3 N 4 28 as an electrochemical sensor for Carbendazim detection, the Co 3 O 4 -rGO/CNT 29 composite towards highly sensitive nitrite detection, AuNPs/CNTs-ErGO 30 electrochemical sensors for highly sensitive detection of hydrazine, cobalt-doped ZnO microstructures 31 for methane gas sensing, and CeO 2 -loaded In 2 O 3 32 and Au-loaded SnO 2 composite nanoparticles 33 for highly sensitive hydrogen detection. All these studies suggest that hybrid heterostructures offer versatility by extending the range of detectable analytes.…”