Temperature-dependent Cs4PbBr6/CsPbBr3 perovskite composite for sensing 2, 4-dinitriphenylhydrazine. (April 2023)

• Record Type: Journal Article
• Authors: Yang, Min; Yan, Yujia; Liu, Enzhou; Sun, Qian; Fan, Jun
• Is Part Of: Materials research bulletin. Volume 160(2023)
• Publication Date: 2023-04
• Subjects: Cs4PbBr6/CsPbBr3 -- 2, 4-dinitriphenylhydrazine -- Fluorescence sensor -- Dynamic quenching; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2022.112135
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Cs4 PbBr6 /CsPbBr3 perovskite were synthesized by controlling the synthesis temperature. Cs4 PbBr6 /CsPbBr3 perovskite exhibited good stability compared to CsPbBr3 . Sensitive detection of DNPH was realized based on the Cs4 PbBr6 /CsPbBr3 perovskite. The Cs4 PbBr6 /CsPbBr3 -based fluorescent sensor was used to detect DNPH in soil samples. Abstract: In recent years, all-inorganic perovskite has been extensively studied due to its excellent photoelectric properties, but the application of Csn PbBr2+ n perovskite with excellent stability in the field of chemical sensing has yet to be developed. Herein, Cs4 PbBr6 /CsPbBr3 with good stability was successfully prepared by controlling the synthesis temperature to 100 °C. The fluorescence intensity of Cs4 PbBr6 /CsPbBr3 exhibited 2, 4-dinitriphenylhydrazine (DNPH) concentration-dependent characteristics and could be used for sensing DNPH based on the dynamic quenching process triggered by the collision between Cs4 PbBr6 /CsPbBr3 and DNPH. A good linear model was established based on the detection signal and DNPH concentration in the range of 0.05∼30 mg/L and the detection limit was 0.033 mg/L. This method was applied to detect DNPH in soil and tap water samples with satisfactory results obtained. Therefore, this research broadens the application of Csn PbBr2+ n in the field of quantitative detection and is expected to be developed into a fluorescent sensor for the detection of hydrazine substances. Graphical abstract: Image, graphical abstract