CH3I sensing using yttrium single atom-doped perovskite nanocrystals

Nanocrystals (NCs) of cesium lead halide perovskites are optically unstable, which prevents their use in optical sensors. The combination of perovskite NCs and metal single atoms (SAs) may be a good solution to this issue. Unfortunately, depositing metal SAs on perovskite NCs remains a challenge due...

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Bibliographic Details
Published in:Nano research 2023-07, Vol.16 (7), p.10429-10435
Main Authors: Feng, Xiaowei, Qin, Yuanlong, Sui, Rui, Wang, Guo, Zhang, Xinyu, Liu, Xinyu, Pei, Jiajing, Liu, Di, Chen, Zhengbo
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Bonding strength
Cesium
Chemistry and Materials Science
Colorimetry
Condensed Matter Physics
Crystals
Lead compounds
Materials Science
Metal halides
Nanocrystals
Nanotechnology
Optical measuring instruments
Optical properties
Perovskites
Research Article
Synthesis
Yttrium
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Summary:Nanocrystals (NCs) of cesium lead halide perovskites are optically unstable, which prevents their use in optical sensors. The combination of perovskite NCs and metal single atoms (SAs) may be a good solution to this issue. Unfortunately, depositing metal SAs on perovskite NCs remains a challenge due to relative weak metal-halide bonds. Herein, we present that, via a photo assisted method using cesium lead halide perovskite NCs as host material to anchor Y single atoms, we successfully synthesize Y SA anchored CsPbBr 3 NCs (Y-SA/CsPbBr 3 NCs) with outstanding fluorescence stability through the formation of two Y−O bonds and two Y−Br bonds. In comparison to bare CsPbBr 3 NCs, Y-SA/CsPbBr 3 NCs possess more stable optical characteristics. The as-synthesized Y-SA/CsPbBr 3 NCs can be employed as a colorimetric platform to perform rapid CH 3 I sensing. Detection limit of 0.044 ppm is exhibited in this approach with excellent anti-interference performance. The Y-SA/CsPbBr 3 NCs-based system has been applied to the detection of CH 3 I in sweet potato samples with satisfying results.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-023-5591-4