Abstract
Persulfate, a powerful oxidizing agent, is extensively employed in numerous industries. Accurate and rapid detection of persulfate (S(2)O(8) (2-)) is essential. This study reports the development of a fluorescent sensor based on Am-CDs. It is synthesized from ascorbic acid (AA) and m-phenylenediamine (m-PD) through a one-step hydrothermal method. The fluorescence of Am-CDs demonstrated selective sensitivity to S(2)O(8) (2-) via static quenching. A sensitive fluorescent sensor was constructed for S(2)O(8) (2-), exhibiting a linear detection range of 1.96 to 15.59 μM with a limit of detection (LOD) of 0.94 μM. This fluorescence method was successfully applied to detect S(2)O(8) (2-) in water samples, achieving recoveries of 98.07% to 102.33%. The fluorescent sensor developed in this study offers a simple and effective method for quantifying S(2)O(8) (2-) in aquatic environments.