{"title":"Amine functionalized Fe(III)-doped-ZnO nanoparticles based alginate beads for the removal of Cu(II) from aqueous solution","authors":"Aquib Jawed , Apporva Sharad , Ayush Chutani , Mehak , Lalit M. Pandey","doi":"10.1016/j.nanoso.2024.101199","DOIUrl":null,"url":null,"abstract":"<div><p>The current study investigates the removal of Cu(II) ions from an aqueous solution through adsorption over amine-modified Fe(III)-doped-ZnO nanoparticles (FZO) beads. The physico-chemical properties of the synthesized FZO and FZO-M beads were determined using field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, X-Ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The effects of various adsorption parameters, including pH, temperature, dosage, contact time and initial metal concentration, were investigated for the removal of Cu(II) ions. The synthesized FZO and FZO-M beads showed the complete removal of Cu(II) ions from a 50 ppm aqueous solution at a dosage of 1 g/L, pH of 4 and temperature of 25 °C within 720 min. The formation of both cuprous oxide (Cu<sub>2</sub>O) and cupric oxide (CuO) phases of copper oxides was achieved through the adsorption of Cu(II) over FZO and FZO-M beads, as revealed from FTIR, XRD and XPS analysis. The kinetics of the Cu(II) adsorption over both the synthesized beads follows a pseudo-second-order model, being faster for FZO-M beads than FZO beads. After amine modification of the FZO NPs, the maximum adsorption capacity of the FZO-M beads for the removal of Cu(II) ions was enhanced by 1.7 times and estimated to be 2144.5 mg/g, as per the Langmuir isotherm model. The Cu(II) removal mechanism, as identified by XPS analysis, revealed adsorption, complexation and copper oxides formation.</p></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":null,"pages":null},"PeriodicalIF":5.4500,"publicationDate":"2024-05-01","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/S2352507X24001100","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
The current study investigates the removal of Cu(II) ions from an aqueous solution through adsorption over amine-modified Fe(III)-doped-ZnO nanoparticles (FZO) beads. The physico-chemical properties of the synthesized FZO and FZO-M beads were determined using field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, X-Ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The effects of various adsorption parameters, including pH, temperature, dosage, contact time and initial metal concentration, were investigated for the removal of Cu(II) ions. The synthesized FZO and FZO-M beads showed the complete removal of Cu(II) ions from a 50 ppm aqueous solution at a dosage of 1 g/L, pH of 4 and temperature of 25 °C within 720 min. The formation of both cuprous oxide (Cu2O) and cupric oxide (CuO) phases of copper oxides was achieved through the adsorption of Cu(II) over FZO and FZO-M beads, as revealed from FTIR, XRD and XPS analysis. The kinetics of the Cu(II) adsorption over both the synthesized beads follows a pseudo-second-order model, being faster for FZO-M beads than FZO beads. After amine modification of the FZO NPs, the maximum adsorption capacity of the FZO-M beads for the removal of Cu(II) ions was enhanced by 1.7 times and estimated to be 2144.5 mg/g, as per the Langmuir isotherm model. The Cu(II) removal mechanism, as identified by XPS analysis, revealed adsorption, complexation and copper oxides formation.
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 .
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