Fluorescent methylammonium lead halide perovskite quantum dots as a sensing material for the detection of polar organochlorine pesticide residues
Yayu Yang, Ailing Han, Sijia Hao, Xia Li, Xiaoyu Luo, Guozhen Fang, Jifeng Liu, Shuo Wang
Abstract
H NMR, FTIR, XPS and XRD were performed first to illustrate the sensing mechanism. In the presence of polar OCPs, the MAPB-QDs' capping ligands, oleic acid (OA) and oleylamine (OAm), were replaced with OCPs and then the chlorine element was adequately doped into QDs, resulting in the increase of the MAPB-QDs' bandgap. As result of the insufficient stability of MAPB-QDs in the presence of moisture, MAPB-QDs were mixed with PDMS and used as the colorimetric cards for fast detection of OCPs in real samples.
Topics & Concepts
HalideFluorescencePerovskite (structure)PolarOrganochlorine pesticideQuantum dotPesticideEnvironmental chemistryChemistryPesticide residueLead (geology)Materials scienceInorganic chemistryOptoelectronicsOrganic chemistryOpticsPhysicsGeologyEcologyBiologyAstronomyGeomorphologyPerovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films