Bisphenol A Electrochemical Sensor Using Graphene Oxide and β-Cyclodextrin-Functionalized Multi-Walled Carbon...

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Bisphenol A (BPA) is an endocrine-disrupting compound prevalent in food packaging.
• BPA contamination in food and water poses environmental and health risks, necessitating effective monitoring methods.

Purpose of the Study:

• To develop a simple, low-cost, and sensitive electrochemical sensor for detecting Bisphenol A (BPA) in water samples.

Main Methods:

• Fabrication of an electrochemical sensor electrode using graphene oxide and β-cyclodextrin functionalized multiwalled carbon nanotubes.
• Utilizing the synergistic properties of graphene oxide, carbon nanotubes, and β-cyclodextrin for enhanced sensing.
• Employing a diffusion-controlled oxidation reaction for BPA detection.

Main Results:

• The sensor demonstrated a two-step linear response over concentration ranges of 0.05–5 μM and 5–30 μM.
• Achieved a low limit of detection (LOD) of 6 nM for BPA.
• Exhibited excellent reproducibility, stability over one month, and high recovery rates in real water samples with minimal interference.

Conclusions:

• The developed electrochemical sensor offers a promising platform for sensitive and cost-effective monitoring of Bisphenol A in water.
• This technology can contribute to the development of robust water quality monitoring systems.