Carbon dot-based fluorescent sensor for selective and sensitive detection of persulfate

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Persulfate (S2O8 2-) is a potent oxidizing agent with widespread industrial applications.
• Accurate and rapid detection of persulfate is crucial for various processes and environmental monitoring.

Purpose of the Study:

• To develop a novel fluorescent sensor for the sensitive and selective detection of persulfate.
• To synthesize and characterize a new material for persulfate sensing.

Main Methods:

• Synthesis of Am-CDs from ascorbic acid (AA) and m-phenylenediamine (m-PD) via a one-step hydrothermal method.
• Development of a fluorescence-based detection method utilizing static quenching mechanism.
• Validation of the sensor's performance including linear detection range and limit of detection (LOD).

Main Results:

• The Am-CDs based fluorescent sensor exhibited selective sensitivity towards persulfate.
• A linear detection range of 1.96 to 15.59 μM and an LOD of 0.94 μM were achieved.
• Successful application in detecting persulfate in real water samples with high recovery rates (98.07%–102.33%).

Conclusions:

• A simple, effective, and sensitive fluorescent sensor for persulfate detection was successfully developed.
• The Am-CDs based sensor demonstrates potential for practical application in environmental water analysis.
• This study provides a valuable tool for monitoring persulfate levels in aquatic environments.