Fabrício C. Tanaka , Daniel A. Gonçalves , Cícero R. Cena , Marcia R. de Moura , Fauze A. Aouada
{"title":"开发用于去除水中农药的磁性纳米复合水凝胶","authors":"Fabrício C. Tanaka , Daniel A. Gonçalves , Cícero R. Cena , Marcia R. de Moura , Fauze A. Aouada","doi":"10.1016/j.nanoso.2024.101232","DOIUrl":null,"url":null,"abstract":"<div><p>Using magnetic and biodegradable polymers for removal of soluble pesticides can reduce environmental and human health damage caused by their presence in rivers, streams, and lakes. In this study, we develop and characterize the crystallinity and thermal properties of novel magnetic hydrogels based on polysaccharides, zeolites, and magnetite (Fe<sub>3</sub>O<sub>4</sub>) magnetic nanoparticles (MNs) functionalized with 3-aminopropyltriethoxysilane (Fe<sub>3</sub>O<sub>4</sub>@NH<sub>2</sub>), supported in poly(methacrylic acid)-co-polyacrylamide networks. The potential of the hydrogel for herbicide removal, specifically paraquat, is also investigated. The Fourier-transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetric, kinetic, and swelling degree analysis results demonstrate that MNs do not affect the physicochemical properties and pesticide sorption. However, minor changes, such as the peak at 2θ = 35.57º representing the (311) plane of Fe<sub>3</sub>O<sub>4</sub>, confirmed the incorporation of MNs into the polymer matrix. The increase in pH caused an increase in the swelling degree from 1.2 to 10.0 w.w<sup>−1</sup>, indicating an increase both the pore size, and possibly, in the removal properties. The adsorption results of paraquat through ultraviolet–visible spectroscopy measurements show a small difference in absorptive capacity (q<sub>eq</sub>) between pure hydrogel (12.95 mg.g<sup>−1</sup>) and hydrogel with 2.0 % functionalized Fe<sub>3</sub>O<sub>4</sub> NPs (12.99 mg.g<sup>−1</sup>). Overall, incorporating Fe<sub>3</sub>O<sub>4</sub> NPs in the hydrogel matrix yields materials with promising characteristics and while offering easier, safer removal from the environment.</p></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":null,"pages":null},"PeriodicalIF":5.4500,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Development of magnetic nanocomposite hydrogels for removal of pesticide from water\",\"authors\":\"Fabrício C. Tanaka , Daniel A. Gonçalves , Cícero R. Cena , Marcia R. de Moura , Fauze A. Aouada\",\"doi\":\"10.1016/j.nanoso.2024.101232\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Using magnetic and biodegradable polymers for removal of soluble pesticides can reduce environmental and human health damage caused by their presence in rivers, streams, and lakes. In this study, we develop and characterize the crystallinity and thermal properties of novel magnetic hydrogels based on polysaccharides, zeolites, and magnetite (Fe<sub>3</sub>O<sub>4</sub>) magnetic nanoparticles (MNs) functionalized with 3-aminopropyltriethoxysilane (Fe<sub>3</sub>O<sub>4</sub>@NH<sub>2</sub>), supported in poly(methacrylic acid)-co-polyacrylamide networks. The potential of the hydrogel for herbicide removal, specifically paraquat, is also investigated. The Fourier-transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetric, kinetic, and swelling degree analysis results demonstrate that MNs do not affect the physicochemical properties and pesticide sorption. However, minor changes, such as the peak at 2θ = 35.57º representing the (311) plane of Fe<sub>3</sub>O<sub>4</sub>, confirmed the incorporation of MNs into the polymer matrix. The increase in pH caused an increase in the swelling degree from 1.2 to 10.0 w.w<sup>−1</sup>, indicating an increase both the pore size, and possibly, in the removal properties. The adsorption results of paraquat through ultraviolet–visible spectroscopy measurements show a small difference in absorptive capacity (q<sub>eq</sub>) between pure hydrogel (12.95 mg.g<sup>−1</sup>) and hydrogel with 2.0 % functionalized Fe<sub>3</sub>O<sub>4</sub> NPs (12.99 mg.g<sup>−1</sup>). Overall, incorporating Fe<sub>3</sub>O<sub>4</sub> NPs in the hydrogel matrix yields materials with promising characteristics and while offering easier, safer removal from the environment.</p></div>\",\"PeriodicalId\":397,\"journal\":{\"name\":\"Nano-Structures & Nano-Objects\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.4500,\"publicationDate\":\"2024-06-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nano-Structures & Nano-Objects\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352507X24001434\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Physics and Astronomy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano-Structures & Nano-Objects","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352507X24001434","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
Development of magnetic nanocomposite hydrogels for removal of pesticide from water
Using magnetic and biodegradable polymers for removal of soluble pesticides can reduce environmental and human health damage caused by their presence in rivers, streams, and lakes. In this study, we develop and characterize the crystallinity and thermal properties of novel magnetic hydrogels based on polysaccharides, zeolites, and magnetite (Fe3O4) magnetic nanoparticles (MNs) functionalized with 3-aminopropyltriethoxysilane (Fe3O4@NH2), supported in poly(methacrylic acid)-co-polyacrylamide networks. The potential of the hydrogel for herbicide removal, specifically paraquat, is also investigated. The Fourier-transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetric, kinetic, and swelling degree analysis results demonstrate that MNs do not affect the physicochemical properties and pesticide sorption. However, minor changes, such as the peak at 2θ = 35.57º representing the (311) plane of Fe3O4, confirmed the incorporation of MNs into the polymer matrix. The increase in pH caused an increase in the swelling degree from 1.2 to 10.0 w.w−1, indicating an increase both the pore size, and possibly, in the removal properties. The adsorption results of paraquat through ultraviolet–visible spectroscopy measurements show a small difference in absorptive capacity (qeq) between pure hydrogel (12.95 mg.g−1) and hydrogel with 2.0 % functionalized Fe3O4 NPs (12.99 mg.g−1). Overall, incorporating Fe3O4 NPs in the hydrogel matrix yields materials with promising characteristics and while offering easier, safer removal from the environment.
期刊介绍:
Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .