Magnetite (Fe3O4) nanoparticles: Synthesis, characterization and electrochemical properties

Tipsawat, Pannawit; Wongpratat, Unchista; Phumying, Santi; Chanlek, Narong; Chokprasombat, Komkrich; Maensiri, Santi

doi:10.1016/j.apsusc.2017.11.053

Cited by 70 publications

(29 citation statements)

References 11 publications

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“…Characterisation results for the synthesized magnetite revealed the presence of peaks at 21, 24, 35, 40, 50, 61, 63, 69, and 74 theta degrees. As such, the results obtained in this study are in agreement with the existing literature (Tipsawat et al, 2018, Bezdorozhev et al, 2017, Tahar et al, 2018. Moreover, quantitative results revealed that there was no presence of other peaks in magnetite's diffraction pattern, which, if existed, could suggest the existence of other impurities in the matrices of the synthesized mineral.…”

Section: Magnetitesupporting

confidence: 91%

Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept

Akinwekomi

Maree²,

Masindi

et al. 2020

Minerals Engineering

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Pollution of water resources by acid mine drainage (AMD) has been an issue of primary concern in recent decades, since it negatively affects the environment and its suitability to foster life. As such, efforts to recover, valorise and beneficiate minerals acquired from AMD treatment process have been ongoing, albeit with minimal success. With that in mind, this study unpacks novel ways of beneficiating AMD via the synthesis of valuable minerals with myriads of industrial applications. To this end, real AMD was used to synthesize goethite, hematite, magnetite, and gypsum (product minerals). Drinking water was also reclaimed as part of the treatment process, hence rendering this system a zero-liquid-discharge (ZLD) process. For the synthesis of goethite, hematite, and magnetite, Fe(III) and Fe(II) were recovered via sequential precipitation in batch reactors. Lime was added to treated water to synthesize high-grade gypsum. Furthermore, reverse osmosis (RO) was employed to reclaim drinking water as per South African drinking water standards (SANS 241) specifications. Product minerals were ascertained using advanced analytical techniques. Concisely, this study proved that AMD can be beneficiated into valuable minerals, which could be utilized in a number of industrial applications. The profits from selling the product minerals can potentially aid in offsetting the running costs of the treatment process, hence making this

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Section: Magnetitesupporting

confidence: 91%

Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept

Akinwekomi

Maree²,

Masindi

et al. 2020

Minerals Engineering

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“…The crystalline structure of MXs was composed mainly of magnetite that had similar the diffraction peaks at 2θ values of 18°, 30°, 35.5°, 43°, 57°, and 62° which were corresponding to 111, 220, 311, 400, 511, and 440 of the crystallographic planes of magnetite (ICDD card no. 00-01900629) according to the results of Tipsawat et al [45]. It can be observed that MXs with low M/R ratio had low-intensity and broadened diffraction peaks than MXs with high M/R ratio.…”

Section: Xrd Analysismentioning

confidence: 82%

Synthesis and Characterization of Magnetic Xerogel Monolith as an Adsorbent for As(V) Removal from Groundwater

et al. 2021

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Arsenic contamination of groundwater is still a global problem due to the toxicity at low dose on human health confirmed by epidemiological studies. Magnetic xerogel monoliths (MXs) were synthesized by the sol-gel polymerization using resorcinol, formaldehyde, alkaline catalyst and magnetite. The varying molar ratios of magnetite and resorcinol (M/R) in the gel were evaluated for As(V) removal from groundwater. The surface chemistry, structure and morphology of MXs related to arsenic adsorption were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and point of zero charge. Batch adsorption experiments were carried out to investigate the effects of Fe contents, initial pH and adsorbent dose on As(V) removal performance. The MXs with molar ratio of M/R at 0.15 gave the maximum As(V) adsorption capacity and removal with values of 62.8 µg/g and 86.7%, respectively. The adsorption data were well described by the Elovich equation of the kinetic model and the Freundlich isotherm. The thermodynamic studies demonstrated that the adsorption process was endothermic and spontaneous in nature. MXs showed to be a good alternative for As(V) removal from groundwater and achieving the efficient desorption, and thus fulfilled the Mexican standard for drinking water.

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“…The grain edges of Fe 3 O 4 particles were clear without any attachment, and the crystallization was insufficient. A series of weak diffraction rings could be found in the SAED pattern, which were indexed to the (111) and (311) crystal planes of magnetite Fe 3 O 4 [ 59 ]. The element analysis results suggested that four elements were detected in pure Fe 3 O 4 powders.…”

Section: Resultsmentioning

confidence: 99%

Magnetically Recyclable Wool Keratin Modified Magnetite Powders for Efficient Removal of Cu2+ Ions from Aqueous Solutions

Zhang

Guo

et al. 2021

Nanomaterials

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The treatment of wastewater containing heavy metals and the utilization of wool waste are very important for the sustainable development of textile mills. In this study, the wool keratin modified magnetite (Fe3O4) powders were fabricated by using wool waste via a co-precipitation technique for removal of Cu2+ ions from aqueous solutions. The morphology, chemical compositions, crystal structure, microstructure, magnetism properties, organic content, and specific surface area of as-fabricated powders were systematically characterized by various techniques including field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), thermogravimetric (TG) analysis, and Brunauer–Emmett–Teller (BET) surface area analyzer. The effects of experimental parameters such as the volume of wool keratin hydrolysate, the dosage of powder, the initial Cu2+ ion concentration, and the pH value of solution on the adsorption capacity of Cu2+ ions by the powders were examined. The experimental results indicated that the Cu2+ ion adsorption performance of the wool keratin modified Fe3O4 powders exhibited much better than that of the chitosan modified ones with a maximum Cu2+ adsorption capacity of 27.4 mg/g under favorable conditions (0.05 g powders; 50 mL of 40 mg/L CuSO4; pH 5; temperature 293 K). The high adsorption capacity towards Cu2+ ions on the wool keratin modified Fe3O4 powders was primarily because of the strong surface complexation of –COOH and –NH2 functional groups of wool keratins with Cu2+ ions. The Cu2+ ion adsorption process on the wool keratin modified Fe3O4 powders followed the Temkin adsorption isotherm model and the intraparticle diffusion and pseudo-second-order adsorption kinetic models. After Cu2+ ion removal, the wool keratin modified Fe3O4 powders were easily separated using a magnet from aqueous solution and efficiently regenerated using 0.5 M ethylene diamine tetraacetic acid (EDTA)-H2SO4 eluting. The wool keratin modified Fe3O4 powders possessed good regenerative performance after five cycles. This study provided a feasible way to utilize waste wool textiles for preparing magnetic biomass-based adsorbents for the removal of heavy metal ions from aqueous solutions.

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Magnetite (Fe3O4) nanoparticles: Synthesis, characterization and electrochemical properties

Cited by 70 publications

References 11 publications

Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept

Beneficiation of acid mine drainage (AMD): A viable option for the synthesis of goethite, hematite, magnetite, and gypsum – Gearing towards a circular economy concept

Synthesis and Characterization of Magnetic Xerogel Monolith as an Adsorbent for As(V) Removal from Groundwater

Magnetically Recyclable Wool Keratin Modified Magnetite Powders for Efficient Removal of Cu2+ Ions from Aqueous Solutions

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