CH(3)NH(3)Br solution as a novel platform for the selective fluorescence detection of Pb(2+) ions

The development of a simple fluorescent sensor for detecting the Pb(2+) heavy metal is fundamentally important. The CH(3)NH(3)PbBr(3) perovskite material exhibits excellent photoluminescence properties that are related to Pb(2+). Based on the effects of Pb(2+) on the luminescent properties of CH(3)NH(3)PbBr(3), we design a novel platform for the selective fluorescence detection of Pb(2+) ions. Herein, we use a CH(3)NH(3)Br solution at a high concentration as the fluorescent probe. Incorporation of PbBr(2) into the CH(3)NH(3)Br solution results in a rapid chemical reaction to form CH(3)NH(3)PbBr(3). Hence, the nonfluorescent CH(3)NH(3)Br material displays a sensitive and selective luminescent response to Pb(2+) under UV light illumination. Moreover, the reaction between CH(3)NH(3)Br and PbBr(2) could transform Pb(2+) into CH(3)NH(3)PbBr(3), and therefore, CH(3)NH(3)Br may also be used to extract Pb(2+) from liquid waste in recycling applications.