CH3NH3Br solution as a novel platform for the selective fluorescence detection of Pb2+ ions

Jun Yan; Yuchun He; Yunlin Chen; Yongzhe Zhang; Hui Yan

doi:10.1038/s41598-019-52431-y

CH₃NH₃Br solution as a novel platform for the selective fluorescence detection of Pb²⁺ ions

Sci Rep. 2019 Nov 1;9(1):15840. doi: 10.1038/s41598-019-52431-y.

Authors

Jun Yan¹, Yuchun He¹, Yunlin Chen², Yongzhe Zhang³, Hui Yan⁴

Affiliations

¹ Institute of Applied Micro-Nano Materials, School of Science, Beijing Jiaotong University, Beijing, 100044, People's Republic of China.
² Institute of Applied Micro-Nano Materials, School of Science, Beijing Jiaotong University, Beijing, 100044, People's Republic of China. ylchen@bjtu.edu.cn.
³ College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P.R. China. yzzhang@bjut.edu.cn.
⁴ College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P.R. China.

Abstract

The development of a simple fluorescent sensor for detecting the Pb²⁺ heavy metal is fundamentally important. The CH₃NH₃PbBr₃ perovskite material exhibits excellent photoluminescence properties that are related to Pb²⁺. Based on the effects of Pb²⁺ on the luminescent properties of CH₃NH₃PbBr₃, we design a novel platform for the selective fluorescence detection of Pb²⁺ ions. Herein, we use a CH₃NH₃Br solution at a high concentration as the fluorescent probe. Incorporation of PbBr₂ into the CH₃NH₃Br solution results in a rapid chemical reaction to form CH₃NH₃PbBr₃. Hence, the nonfluorescent CH₃NH₃Br material displays a sensitive and selective luminescent response to Pb²⁺ under UV light illumination. Moreover, the reaction between CH₃NH₃Br and PbBr₂ could transform Pb²⁺ into CH₃NH₃PbBr₃, and therefore, CH₃NH₃Br may also be used to extract Pb²⁺ from liquid waste in recycling applications.

Abstract

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