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Cited by 89Quantum Dots Synthesis And PropertiesMolecular Sensors and Ion DetectionPerovskite Materials and Applications

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Visual and sensitive fluorescent sensing for ultratrace mercury ions by perovskite quantum dots

Lu, Li-Qiang, Tan, Tian, Tian, Xi-Ke, Li, Yong, Deng, Pan·2017·Analytica Chimica Acta
DOI 10.1016/j.aca.2017.07.014
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Abstract

Mercury ions sensing is an important issue for human health and environmental safety. A novel fluorescence nanosensor was designed for rapid visual detection of ultratrace mercury ions (Hg 2+) by using CH 3 NH 3 PbBr 3 perovskite quantum dots (QDs) based on the surface ion-exchange mechanism. The synthesized CH 3 NH 3 PbBr 3 QDs can emitt intense green fluorescence with high quantum yield of 50.28%, and can be applied for Hg 2+ sensing with the detection limit of 0.124 nM (24.87 ppt) in the range of 0 nM-100 nM. Furthermore, the interfering metal ions have no any influence on the fluorescence intensity of QDs, showing the perovskite QDs possess the high selectivity and sensitivity for Hg 2+ detection. The sensing mechanism of perovskite QDs for Hg 2+ is has also been investigated by XPS, EDX studies, showing Pb 2+ on the surface of perovskite QDs has been partially replaced by Hg 2+. Spot plate test shows that the perovskite QDs can also be used for visual detection of Hg 2+. Our research indicated the perovskite QDs are promising candidates for the visual fluorescence detection of environmental micropollutants.

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Crossref · 10.1016/j.aca.2017.07.014

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  • Ion exchange in perovskite materials can alter optical properties such as emission color and intensity, enabling environmental sensing.

    “This exchange can alter the optical properties of the perovskite, such as emission color and intensity, enabling environmental sensing.”

    From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [44]

  • Lu et al. developed a MAPbBr3 perovskite quantum dot fluorescent sensor that detects Hg2+ through surface ion exchange, resulting in fluorescence quenching.

    “Lu et al. [44] developed a MAPbBr 3 perovskite quantum dot fluorescent sensor that detects Hg 2+ through surface ion exchange, resulting in fluorescence quenching.”

    From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [44]

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Metadata

Authors
Lu, L.-Q., Tan, T., Tian, X.-K., Li, Y., & Deng, P.
Affiliations
China University of Geosciences (CN)
ORCID
Li, Yong
Venue
Analytica Chimica Acta
Publisher
Elsevier BV
Published
2017-09
Volume
986
Pages
109-114
ISSN
0003-2670 (ISSN-L)
DOI
10.1016/j.aca.2017.07.014
OpenAlex
W2735288356
Cited by
89
References
1
Citations by year
2026: 7 · 2025: 7 · 2024: 7 · 2023: 16 · 2022: 18 · 2021: 16 · 2020: 8 · 2019: 6 · 2018: 4
FWCI
2.08
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Analytica Chimica Acta (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (41521001, 51371162)
  • Fundamental Research Funds
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
  • Physical Sciences › Chemistry › Spectroscopy › Molecular Sensors and Ion Detection
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
Keywords
mercury ion detection, perovskite quantum dots, MAPbBr3, fluorescent nanosensor, visual detection, surface ion exchange, ultra-trace detection, metal ion selectivity

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