Abstract
An ingenious fluorescence sensor was constructed by in-situ encapsulating carbon dots (CDs) into zeolitic imidazolate framework-8 (ZIF-8) to resist aggregation-caused quenching of CDs. The obtained CDs@ZIF nanocomposite showed excellent sensing abilities towards Cr2O72- anion and picric acid with quenching constant values of 7.08 × 104 M−1 and 1.50 × 105 M−1, respectively. The fluorescent responsiveness of CDs@ZIF nanocomposite for Cr2O72- anion and picric acid can be ascribed to the inner filter effect.
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