Graphene Oxide-Based Sensor for Ultrasensitive Visual Detection of Fluoride

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Fluoride ions are prevalent environmental contaminants.
• Accurate and sensitive detection of fluoride is crucial for environmental monitoring and public health.
• Existing detection methods may lack visual simplicity or require complex instrumentation.

Purpose of the Study:

• To develop a simple, visual, and highly sensitive method for fluoride ion detection.
• To utilize the unique properties of N-doped graphene oxide for sensing applications.
• To establish a new sensing platform for environmental fluoride monitoring.

Main Methods:

• Synthesis and characterization of N-doped graphene oxide.
• Investigation of the fluorescence quenching and reactivation mechanism upon interaction with fluoride ions.
• Optimization of experimental conditions for visual detection.
• Validation of the detection limit and selectivity.

Main Results:

• N-doped graphene oxide exhibits fluorescence that can be modulated by fluoride ions.
• A visual detection limit down to picomole per liter (pmol L⁻¹) was achieved.
• The method demonstrated high sensitivity and selectivity for fluoride ions.
• The fluorescence quenching/reactivation process was reversible, allowing for potential reusability.

Conclusions:

• N-doped graphene oxide is a promising material for visual fluoride ion sensing.
• The developed method offers a simple and sensitive approach for environmental fluoride monitoring.
• This work provides a foundation for developing novel fluorescent sensors based on graphene oxide derivatives.