Abstract
In this work I present fluorescent carbon dots (CDs) prepared by facile and inexpensive synthesis by hydrothermal carbonization from cationic surfactant cetylpyridinium chloride (CPC). These CDs show tunable photoluminescence as well as long-term colloidal stability. Moreover, CDs exhibit high selectivity and sensitivity towards Fe3+ ions. Therefore a specific quantitative method is proposed for the determination of Fe3+ ions based on fluorescence quenching of CDs.
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