ZnO-nanostructured electrochemical sensor for efficient detection of glyphosate in water
2025
Novakovic, Zorica | Vasiljevic, Zorka, Z | Nikolic, Maria, Vesna | Tadic, Nenad, B | Djordjevic, Tijana | Radovic, Marko | Gadjanski, Ivana | Papović, Snežana | Vlahovic, Filip | Stankovic, Dalibor | Vidic, Jasmina | University of Novi Sad | Institute for Multidisciplinary Research [Belgrade] (IMSI) ; University of Belgrade [Belgrade] | University of Belgrade [Belgrade] | Institute of Pesticides and Environmental Protection | Faculty of Technology and Metallurgy [University of Belgrade] ; University of Belgrade [Belgrade] | MICrobiologie de l'ALImentation au Service de la Santé (MICALIS) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Ministry of Science, Technological Development and Innovation of the Republic of Serbia, contract 451–03–136/2025–03/200053 | Ministry of Science, Technological Development and Innovation of the Republic of Serbia contract number 451–03–66/Z. Novakovic et al. Talanta Open 12 (2025) 100481122024–03/200358 | ANR-19-GURE-0006,EUGLOH 2.0,European University Alliance for Global Health(2019) | European Project: 101135402,MOBILES | European Project: 872662 ,IPANEMA | European Project: 739570,Antares
International audience
Показать больше [+] Меньше [-]Английский. Glyphosate is a widely used broad-spectrum herbicide for controlling grassy weeds, despite having potential health hazards. Herein, we report on a solid-state electrochemical sensor based on ZnO nanoparticles (ZnO NPs) for on-site detection of glyphosate. Accordingly, ZnO NPs was drop-cast on the surface of a disposable screenprinted carbon electrode. Eco-friendly ZnO NPs of only 7 nm crystallite sizes were obtained by green sol-gel synthesis using lemon (Citrus limon) waste aqueous extract as the green reducing and capping/stabilizing agent and Zn nitrate precursor as evidenced by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction and diffuse reflectance. SEM confirmed successful electrode functionalization with the synthesized nanoparticles. Under laboratory conditions in acetate buffer (pH 5), the sensor demonstrated excellent selectivity and sensitivity, with a detection limit of 0.648 µM, a wide linear detection range (0.5 µM to 7.5 mM), and a rapid detection time of 30 min. When tested in river water, the sensor achieved a detection limit of 0.96 µM using differential pulse voltammetry. It also exceptionally tolerated interference from similar organophosphorus compounds and ions commonly found in river water. The excellent detection performance of the sensor was attributed to the strong coordination interactions between Zn atoms and phosphonate/carboxylate groups that are enhanced by a hydrogen bond at acidic pH, as determined by chemical calculations. This disposable sensor offers a cost-effective, efficient, and environmentally friendly solution for monitoring glyphosate in water systems.
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Библиографическая информация
Эту запись предоставил Institut national de la recherche agronomique