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

Biosensors (Basel). 2023 Jul 12;13(7):725. doi: 10.3390/bios13070725.

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.

Keywords: bisphenol A; food analysis; molecularly imprinting; nanocomposite.

MeSH terms

  • Biosensing Techniques* / methods
  • Boron
  • Electrochemical Techniques / methods
  • Graphite* / chemistry
  • Limit of Detection
  • Molecular Imprinting* / methods
  • Polymers / chemistry
  • Quantum Dots* / chemistry

Substances

  • bisphenol A
  • Graphite
  • Boron
  • Polymers