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Abstract <p>Chromium(VI)) is known as one of the metal pollutants that can pose a serious threat to the environment, making it crucial to develop a method to detect Cr(VI) in an efficient and accurate way. In this study, a sensitive method for detecting Cr(VI) was proposed based on the newly synthesized fluorescent carbon dots (<b>CD</b>s). The synthesis of CDs was carried out under microwave irradiation using ethylenediamine and nitric acid, yielding highly fluorescent nanomaterials with excitation and emission maxima at 351 and 433 nm, respectively. The fluorescence intensity of CDs was significantly quenched when Cr(VI) was introduced, which was primarily attributed to the static quenching effect and the inner filter effect. Under the optimal detection conditions, a linear relationship was observed between the fluorescence intensity of CDs and Cr(VI) concentration over the range of 0.2–200.0 μM, with a detection limit (3σ/<i>k</i>) of 0.15 μM. Furthermore, the established approach for Cr(VI) detection was applied to real water samples, showing low relative standard deviation and good recoveries. In summary, this novel strategy provides an excellent option for the detection of Cr(VI) in real samples.</p>

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Rapid Synthesis of Fluorescent Carbon Dots for the Detection of Cr(VI) in Real Water Samples

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • Xiaoxiao Peng,
  • Xing Liu,
  • Chenchen Li,
  • Shu Chen,
  • Yunfei Long

摘要

Abstract

Chromium(VI)) is known as one of the metal pollutants that can pose a serious threat to the environment, making it crucial to develop a method to detect Cr(VI) in an efficient and accurate way. In this study, a sensitive method for detecting Cr(VI) was proposed based on the newly synthesized fluorescent carbon dots (CDs). The synthesis of CDs was carried out under microwave irradiation using ethylenediamine and nitric acid, yielding highly fluorescent nanomaterials with excitation and emission maxima at 351 and 433 nm, respectively. The fluorescence intensity of CDs was significantly quenched when Cr(VI) was introduced, which was primarily attributed to the static quenching effect and the inner filter effect. Under the optimal detection conditions, a linear relationship was observed between the fluorescence intensity of CDs and Cr(VI) concentration over the range of 0.2–200.0 μM, with a detection limit (3σ/k) of 0.15 μM. Furthermore, the established approach for Cr(VI) detection was applied to real water samples, showing low relative standard deviation and good recoveries. In summary, this novel strategy provides an excellent option for the detection of Cr(VI) in real samples.