Preparation and characterization of magnetic graphene oxide nanocomposite (GO-Fe3O4) for removal of strontium and cesium from aqueous solutions

Aytaş, Şule; Yusan, Sabriye; Sert, Şenol; Gök, Cem

doi:10.24294/can.v4i1.1291

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…The calculated E value is used to predict the reaction mechanism of the adsorption process. If the E value is less than 8 kJ/mol, it indicates a physical adsorption, while the E value is higher than 8 kJ/mol, the adsorption process is chemical in nature [48]. In our cases, E value is 222 kJ/mol that means adsorption process is chemical in nature for rGO.…”

Section: Pb(ii) Adsorption Evaluations On Synthesized Adsorbentsmentioning

confidence: 62%

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

Kaptanoglu

Yusan

2022

Environmental Research and Technology

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Graphene oxide (GO) and reduced graphene oxide (rGO) are efficient and low-cost adsorbent carbon-based materials for removing Pb(II) ions from wastewater. This study focuses on the synthesizing GO and rGO by green methods with Tour approach and reduction with L-ascorbic acid, respectively and were characterized by X-ray diffraction, Fourier transform infra-red spectroscopy, Raman spectroscopy and scanning electron microscopy with energy dispersive X-ray spectroscopy. The prepared GO and rGO were used to adsorb Pb(II) ions from aqueous solutions. From the adsorption isotherms, the maximum adsorption capacities of Pb(II) ions on GO and rGO calculated from the Langmuir (117.6 mg/g) and Dubinin–Radushkevich isotherms (138.5 mg/g), respectively, higher than reported studies in the literature. By thermodynamic investigation, it was found that the adsorption of Pb(II) ions on GO and rGO was spontaneous and exothermic.

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Section: Pb(ii) Adsorption Evaluations On Synthesized Adsorbentsmentioning

confidence: 62%

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

Kaptanoglu

Yusan

2022

Environmental Research and Technology

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“…Langmuir isotherm predicts the formation of a monolayer on the adsorbent and assumes that the adsorbed La(III)/Ce(III) ions are homogeneously distributed on the surface of the adsorbent (MPC) [30]. The linear forms of the Langmuir isotherm model are defined by the equation as follows:…”

Section: Langmuir Isothermsmentioning

confidence: 99%

Removal of lanthanum and cerium from aqueous solution using chitosan-functionalized magnetite-pectin

Yacouba,

Oral,

Sert

et al. 2023

Preprint

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In this study magnetite-pectin-chitosan (MPC) nanocomposite was synthetized using a partial reduction co-precipitation method. The structure and morphology of the material were characterized by scanning electron spectroscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR) and vibrating sample magnetometry (VSM). The adsorption of Lanthanum and Cerium ions onto MPC was studied in a batch system as a function of initial pH of solution, contact time, initial concentration and temperature. The La(III)/Ce(III) ions was increased when the initial pH of the solution increased. The optimum pH for La/Ce adsorption was 5 and the maximum adsorption was reached within 30 min. The thermodynamics parameters such as enthalpy change (∆°H), entropy change (∆°S) and Gibbs free energy change (∆°G) were calculated. The results suggested that the adsorption was exothermic and spontaneous. To determine the adsorption characteristics, models of Langmuir, Dubinin-Radushkevich, Freundlich, Temkin and Flory-Huggins adsorption isotherms were applied. Langmuir isotherm model described the data of adsorption very well. The adsorption capacity was found to be 8.17 mg/g and 9.72 mg/g for lanthanum and cerium, respectively.

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“…Technological applications of conductive polymers have been observed for electronics, energy devices, biomedical fields, and so on [4] . Graphene is a one-atom-thick two-dimensional nanosheet material [5] . Graphene oxide is simply a graphene derivative having oxygen-containing surface functionalities on graphene nano-sheet.…”

Section: Introductionmentioning

confidence: 99%

High-tech graphene oxide reinforced conducting matrix nanocomposites—Current status and progress

Kausar,

Ahmad,

Lam

2023

Charact. Appl. Nanomater.

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Graphene oxide can be referred to as oxidized graphene. Similar to graphene, oxidized graphene possesses remarkable structural features, advantageous properties, and technical applications. Among polymeric matrices, conducting polymers have been categorized for p conjugated backbone and semiconducting features. In this context, doping, or nano-additive inclusion, has been found to enhance the electrical conduction features of conjugated polymers. Like other carbon nanostructures (fullerene, carbon nanotube, etc.), graphene has been used to reinforce the conjugated matrices. Graphene can be further modified into several derived forms, including graphene oxide, reduced graphene oxide, and functionalized graphene. Among these, graphene oxide has been identified as an important graphene derivative and nanofiller for conducting matrices. This overview covers essential aspects and progressions in the sector of conjugated polymers and graphene oxide derived nanomaterials. Since the importance of graphene oxide derived nanocomposites, this overview has been developed aiming at conductive polymer/graphene oxide nanocomposites. The novelty of this article relies on the originality and design of the outline, the review framework, and recent literature gathering compared with previous literature reviews. To the best of our knowledge, such an all-inclusive overview of conducting polymer/graphene oxide focusing on fundamentals and essential technical developments has not been seen in the literature before. Due to advantageous structural, morphological, conducting, and other specific properties, conductive polymer/graphene oxide nanomaterials have been applied for a range of technical applications such as supercapacitors, photovoltaics, corrosion resistance, etc. Future research on these high-performance nanocomposites may overcome the design and performance-related challenges facing industrial utilization.

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Preparation and characterization of magnetic graphene oxide nanocomposite (GO-Fe3O4) for removal of strontium and cesium from aqueous solutions

Cited by 6 publications

References 31 publications

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

Removal of lanthanum and cerium from aqueous solution using chitosan-functionalized magnetite-pectin

High-tech graphene oxide reinforced conducting matrix nanocomposites—Current status and progress

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