Ultrasensitive detection of mercury(ii) in aqueous solutions via the spontaneous precipitation of CsPbBr₃ crystallites

Abstract

Mercury (II) is one of the most toxic ions and it has the lowest allowance concentration in water. Lowering the detection limits of Hg2+ based on fluorescent method is challenging...

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“…Also, it is essential to determine whether this microfluidic method is effective in all environmental samples. The use of CsPbBr 3 crystals, NCs, and QDs was also reported in the PL “turn-off” detection of Hg 2+ and UO 2 2+ [ 92 , 93 , 94 , 97 ]. Many of the available reports on CsPbX 3 (X = Cl, Br, and I)-based metal ion sensors confirmed their selectivity to Cu 2+ ; however, the underlying mechanisms of detecting Hg 2+ and UO 2 2+ by CsPbBr 3 crystals, NCs, and QDs are still unclear.…”

“…This work requires further investigations into the underlying mechanism and real-time applications. Jiang et al proposed a two-step precipitation method to synthesize emissive CsPbBr3 crystals (PL emission at 525 nm under 395 nm excitation) toward Hg 2+ detection [93]. When detecting Hg 2+ , both CsPbBr3 NCs and Hg 2+ were co-precipitated in aqueous solution.…”

“…This work was successfully applied in tab and serum sample analysis; therefore, it can be regarded as a remarkable work in Hg 2+ and GSH detection. Jiang et al proposed a two-step precipitation method to synthesize emissive CsPbBr 3 crystals (PL emission at 525 nm under 395 nm excitation) toward Hg 2+ detection [93]. When detecting Hg 2+ , both CsPbBr 3 NCs and Hg 2+ were co-precipitated in aqueous solution.…”