Pesticide-induced photoluminescence quenching of ultra-small Eu3+-activated phosphate and vanadate nanoparticles

Publication date: Available online 20 September 2019Source: Journal of Materials Science & TechnologyAuthor(s): Jovana Periša, Željka Antić, Chong-Geng Ma, Jelena Papan, Dragana Jovanović, Miroslav D. DramićaninAbstractThe aim of this research was to investigate the luminescent behavior of ultra-small Eu3+-activated phosphate and vanadate nanoparticles in the presence of pesticides. Nanoparticles have an average diameter of approximately 2 nm with a narrow size distribution. The monazite crystal structure of phosphate-based particles (space group P121/m1) and single tetragonal zircon-type structure of vanadate-based particles (space group of I41/amd) have been confirmed using X-ray diffraction measurements. All synthesized Eu3+-activated colloidal nanoparticles show sharp emission peaks in the red spectral region. Photoluminescence measurements revealed emission quenching upon addition of millimolar concentrations of following pesticides: 4-Chloro-2-methyl-phenoxyacetic acid (MCPA), 2,4-Dichlorophenoxyacetic acid (2,4-D) and N-(phosphonomethyl)glycine (Glyphosate). In both phosphate and vanadate-based colloidal nanoparticles luminescence quenching is more evident in the presence of 2,4-D pesticide with the lowest limit of detection (0.7 µM) obtained for phosphate-based nanoparticles.Graphical abstract
Source: Journal of Materials Science and Technology - Category: Materials Science Source Type: research