A solid-state colorimetric fluorescence Pb2+-sensing scheme: Mechanically-driven CsPbBr3 nanocrystallization in glass

Liqiang Zhang, Hang Lin, Congyong Wang, Wei Ren Liu, Shuxing Li, Yao Cheng, Ju Xu, Hang Gao, Kang Li, Nigel Copner, Xueyuan Chen, Yuansheng Wang

Research output: Contribution to journalArticlepeer-review

22 Citations (SciVal)

Abstract

Highly toxic Pb2+ poses a great threat to the health of human beings and ecosystems, urgently calling for an efficient Pb2+ detection method. Herein, we demonstrated a brand-new solid-state fluorescence Pb2+-sensing scheme based on a type of Pb2+-responsive borate glass powder that is able to precipitate CsPbBr3 nanocrystals on the glass surface upon grinding with Pb2+ sources, following a mechanically driven glass crystallization mechanism. Pb2+ sensing is achieved via the Pb2+ concentration-dependent green emission of CsPbBr3 as an indicator signal and independent red emission of Eu3+ as a reference signal. Under UV light irradiation, the obvious emissive color variation from red to green as Pb2+ concentration varies enables the intuitive Pb2+-sensing by naked eyes. With the aid of a spectrometer and smartphone, Pb2+ concentration can be quantitatively determined with the detection limit as low as ∼70 ppm and ∼400 ppm, respectively. The semi-quantitative Pb2+ detection is also possible by comparing the emissive color with the calibrated color card. Hopefully, the proposed solid-state fluorescence Pb2+-sensing strategy with high selectivity can be used for portable and quick Pb2+ analysis in daily life.

Original languageEnglish
Pages (from-to)8801-8808
Number of pages8
JournalNanoscale
Volume12
Issue number16
DOIs
Publication statusPublished - 30 Apr 2020
Externally publishedYes

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