Abstract The traditional methods used for the detection of heavy metal ions in an aqueous medium have been considered as complicated and time-consuming; therefore, it is highly recommended to find a rapid and sensitive probe. The functionalized molybdenum disulfide (MoS2) quantum dots (QDs) were developed and used as a sensitive fluorescent probe for monitoring the lead (Pb2+) ions in an aqueous medium. Photoluminescence (PL)/fluorescence intensity of the QDs strongly quenched in the presence of Pb2+ ions. The responsiveness of PL of QDs with Pb2+ in the range of 33 μM to 8.0 mM makes it a wide dynamic range sensing probe with a limit of detection (LOD) of 50 μM. Besides, the linear dependence of an absolute absorption intensity with the concentration of Pb2+ ions makes it a significant probe for monitoring the lead metal ions in an aqueous environment.

中文翻译：

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通过 MoS2 量子点荧光关闭快速检测水性介质中的铅金属离子

摘要 传统的检测水介质中重金属离子的方法复杂、耗时。因此，强烈建议寻找快速灵敏的探针。开发了功能化二硫化钼 (MoS2) 量子点 (QD)，并将其用作灵敏的荧光探针，用于监测水性介质中的铅 (Pb2+) 离子。在 Pb2+ 离子存在下，QD 的光致发光 (PL)/荧光强度强烈猝灭。Pb2+ 在 33 μM 至 8.0 mM 范围内的 QD 的 PL 响应性使其成为检测限 (LOD) 为 50 μM 的宽动态范围传感探针。除了，