Pesticide-induced photoluminescence quenching of ultra-small Eu3+-activated phosphate and vanadate nanoparticles
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第3期
论文作者：Jovana Peri?a Zeljka Anti? Chong-Geng Ma Jelena Papan Dragana Jovanovi? Miroslav D.Drami?anin
文章页码：197 - 204
摘 要：The 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/n1） 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.
Jovana Peri?a1，Zeljka Anti?1，Chong-Geng Ma2，Jelena Papan1，Dragana Jovanovi?1，Miroslav D.Drami?anin1,2
1. Vin?a Institute of Nuclear Sciences, University of Belgrade2. College of Sciences, Chongqing University of Posts and Telecommunications
摘 要：The 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/n1） 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.
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