Rapid sensing of lead metal ions in an aqueous medium by MoS2 quantum dots fluorescence turn-off

被引：73
作者：
Sharma, Prateek [1 ]
Mehata, Mohan Singh [1 ]
机构：
[1] Delhi Technol Univ, Dept Appl Phys, Laser Spect Lab, Bawana Rd, Delhi 110042, India
来源：
MATERIALS RESEARCH BULLETIN | 2020年 / 131卷
关键词：
Transition metal dichalcogenides; MoS2; QDs; Surface functionalization; Heavy metal-ion sensor; Fluorescence turn-off process; RESONANCE ENERGY-TRANSFER; PHOTOLUMINESCENCE; PROBES; SENSOR; PEROXYNITRITE; COMPOSITES; GRAPHENE; PLATFORM; DEVICES; FACILE;
D O I：
10.1016/j.materresbull.2020.110978
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 mu M to 8.0 mM makes it a wide dynamic range sensing probe with a limit of detection (LOD) of 50 mu M. 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.
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页数：8
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