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首页> 外文期刊>RSC Advances >Basophilic green fluorescent carbon nanoparticles derived from benzoxazine for the detection of Cr(vi) in a strongly alkaline environment
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Basophilic green fluorescent carbon nanoparticles derived from benzoxazine for the detection of Cr(vi) in a strongly alkaline environment

机译：衍生自苯并恶嗪的嗜碱性绿色荧光碳纳米颗粒，用于在强碱性环境中检测Cr（vi）

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Fluorescent probes for heavy or transition metal ions in extreme environments are crucially important for practical use. In this work, basophilic green fluorescent carbon nanoparticles (G-CNPs) were synthesized by one-pot hydrothermal treatment of benzoxazine in NaOH aqueous solution. These G-CNPs showed favorable dispersibility in strongly alkaline conditions due to the abundant functional groups on their surface. Based on their good photoluminescence properties and excellent stability, the G-CNPs could be used to detect Cr( VI ) in a strongly alkaline environment (pH = 14) through a fluorescence quenching effect. This detection process was achieved selectively among 17 anions within 30 seconds and the limitation was 0.58 μM (S/N = 3). It was revealed that the fluorescence turn-off process was caused by the inner filter effect (IFE) of Cr( VI ). This study developed efficient fluorescence sensors based on fluorescent carbon nanoparticles, which could be used in strongly alkaline environments.
机译：在极端环境下，用于重金属或过渡金属离子的荧光探针对于实际使用至关重要。在这项工作中，通过在NaOH水溶液中对苯并恶嗪进行一锅水热处理，合成了嗜碱性绿色荧光碳纳米颗粒（G-CNP）。这些G-CNP由于其表面上的大量官能团而在强碱性条件下显示出良好的分散性。基于其良好的光致发光特性和出色的稳定性，G-CNPs可通过荧光猝灭作用用于检测强碱性环境（pH = 14）中的Cr（VI）。该检测过程是在30秒内选择性地在17种阴离子中实现的，限制为0.58μM（S / N = 3）。结果表明，荧光的截止过程是由于Cr（VI）的内部滤光效应（IFE）引起的。这项研究开发了基于荧光碳纳米颗粒的高效荧光传感器，该传感器可用于强碱性环境。

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