Hydrothermal synthesis of hematite (α-Fe2O3) nanoparticle forms: Synthesis conditions, structure, particle shape analysis, cytotoxicity and magnetic properties

Tadić, Marin; Trpkov, Djordje; Kopanja, Lazar; Vojnović, Sandra; Panjan, Matjaž

doi:10.1016/j.jallcom.2019.03.414

Cited by 174 publications

(92 citation statements)

References 97 publications

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“… 33 In another study, they concluded that shape anisotropy affected the coercivity of hematite NPs. 36 They observed that ellipsoid three-dimesional (3D) superstructures of hematite are much higher than that for irregularly shaped hematite NPs. 36 Similarly, physical orientation can be used to achieve either superparamagnetic or ferromagnetic maghemite NPs.…”

Section: Resultsmentioning

confidence: 99%

“… 36 They observed that ellipsoid three-dimesional (3D) superstructures of hematite are much higher than that for irregularly shaped hematite NPs. 36 Similarly, physical orientation can be used to achieve either superparamagnetic or ferromagnetic maghemite NPs. 35 Superparamagnetic properties in NPs are attributed to the random orientation of particles, whereas ferromagnetism is related to parallel orientation of particles.…”

Section: Resultsmentioning

confidence: 99%

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Size-Controlled Synthesis of Iron and Iron Oxide Nanoparticles by the Rapid Inductive Heating Method

et al. 2020

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Inductive heating synthesis is an emerging technique with the potential to displace the hot-injection synthesis method to prepare colloidal particles very rapidly with a narrow size distribution, controlled size, and high crystallinity. In this work, the inductive heating synthesis is applied to produce a short-temperature jump to mimic conditions like the hot-injection method to prepare traditional iron and iron oxide nanoparticles (IONPs) in the 3–11 nm size range within various solvents, precursors, and reaction time conditions. Moreover, this inductive heating technique can be used under unique experimental conditions not available for hot-injection reactions. These conditions include the use of very high initial monomer concentrations. Considering benefits over conventional methods, the inductive heating technique has the potential to provide an industrial level scale-up synthesis. The magnetization of these particles is consistent with the magnetization of the particles from the literature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Size-Controlled Synthesis of Iron and Iron Oxide Nanoparticles by the Rapid Inductive Heating Method

et al. 2020

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Section: Hematite (α-Fe2o3)mentioning

confidence: 99%

“…Curie temperature (TC = 682.85 °C), hematite has a paramagnetic phase [149,150]. The magnetic properties of hematite depend on numerous parameters like the crystallinity, subparticle structure, the size of the particle, exchange interactions, and cation doping [150]. Additionally to the size and shape of hematite crystallites, substituting with different metal ions is also a critical factor that can enhance the adsorption properties of hematite which are crucial for water purification [146].…”

Section: Hematite (α-Fe2o3)mentioning

confidence: 99%

Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

220

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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“…Hematite (α-Fe 2 O 3 ) is a naturally occurring iron oxide abundant in rocks and soils [17]. Different synthesis methods for various nanostructured α-Fe 2 O 3 , such as combustion [18,19], hydrothermal process [20][21][22], sol-gel [23,24], precipitation [25][26][27], and thermal oxidation, [28][29][30] have already been explored for various applications. Several studies have investigated the utilization of nanostructured α-Fe 2 O 3 for both adsorptive removal and photocatalytic degradation of pollutants [22,23,28,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Thermally grown Zn-doped hematite (α-Fe2O3) nanostructures for efficient adsorption of Cr(VI) and Fenton-assisted degradation of methyl orange

Aquino

Balela

2020

SN Appl. Sci.

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This work presents a facile method of growing zinc-doped α-hematite (Zn-doped α-Fe 2 O 3) nanostructures via thermal oxidation of Fe sheet in the presence of Zn 2+ mist. Both undoped and Zn-doped α-Fe 2 O 3 nanostructures exhibit blade-like morphology mixed with some nanowires. In general, smaller yet denser nanostructures are formed at higher oxidation temperatures. On the other hand, misting (water vapor) enhances the oxidation rate, leading to larger nanoblades. Raman and energy dispersive X-ray spectroscopy reveal the successful incorporation of Zn in the α-Fe 2 O 3 lattice. However, excessive Zn 2+ (0.01 M) promotes the formation of large Zn hydroxide chloride particles on top of the α-Fe 2 O 3 nanoblades. The undoped α-Fe 2 O 3 nanostructures prepared at 650 °C in water vapor effectively adsorb hexavalent chromium [Cr(VI)] in aqueous solution with about 95% removal efficiency. The sample oxidized in 0.005 M Zn 2+ mist is also efficient in the Fenton-assisted photodegradation of methyl orange with > 90% removal even after five degradation cycles.

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Hydrothermal synthesis of hematite (α-Fe2O3) nanoparticle forms: Synthesis conditions, structure, particle shape analysis, cytotoxicity and magnetic properties

Cited by 174 publications

References 97 publications

Size-Controlled Synthesis of Iron and Iron Oxide Nanoparticles by the Rapid Inductive Heating Method

Size-Controlled Synthesis of Iron and Iron Oxide Nanoparticles by the Rapid Inductive Heating Method

Insight on water remediation application using magnetic nanomaterials and biosorbents

Thermally grown Zn-doped hematite (α-Fe2O3) nanostructures for efficient adsorption of Cr(VI) and Fenton-assisted degradation of methyl orange

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