Monodisperse α-Fe2O3 nanoplatelets: Synthesis and characterization

Ayachi, Ahmed Abdelhakim; Mechakra, H.; Silván, Miguel Manso; Boudjaadar, Smail; Achour, S.

doi:10.1016/j.ceramint.2014.10.024

Cited by 33 publications

(29 citation statements)

References 22 publications

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“…Furthermore, the intense and sharp peaks in XRD (Figure 1(b)) are indicative of good crystalline nature of the sample without producing any impurities and mixing of other phases of iron oxide. The XRD results are consistent with the recent research work reported by various workers on iron oxides [11,31,32].…”

Section: X-ray Diffraction (Xrd) Studiessupporting

confidence: 82%

“…The complete process includes nucleation of iron hydroxide (particle formation) by hydrolysis of iron complexes, growth regulation, nanorice formation due to urea decomposition, and dehydration due to calcination process. Initially, crystal nucleation of -FeOOH starts from the solution and tends to be regulated eventually in the form of anisotropic nanorice due to increases in temperature and shape directing molecules of urea [32]. The shape of the nanoparticles may be tuned by controlling many experimental parameters such as concentration of the precursor, reducing agents, and stabilizers with reaction conditions like temperature, ambient environment, and time.…”

Section: Possible Formation Mechanismmentioning

confidence: 99%

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Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Singh

Sharma

Kumar

et al. 2015

Indian Journal of Materials Science

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In the synthesis of nanostructure materials a specific emphasis has been focused on the control of shape and orientation of nanocrystals to obtain prerequisite properties of the materials. Nanorice is a new hybrid nanoparticle prolate geometry of nanoshells with reduced symmetry having new exciting optical behavior. Rice-shaped -FeOOH nanocrystals have been synthesized by a simple hydrolysis chemical method using ferric aqueous solution and urea as surfactant. The successive calcination of -FeOOH nanocrystals at 650 ∘ C results in the formation of the porous -Fe 2 O 3 (hematite) microspheres. The as-synthesized yield ofFeOOH nanocrystals was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), and optical spectroscopy. The successive transformation of rice-shaped -FeOOH nanostructures into porous -Fe 2 O 3 (hematite) microspheres through calcination process was confirmed by XRD, SEM, and EDAX studies. The water contact angle of as-prepared -Fe 2 O 3 microspheres shows hydrophobic behavior of the material.

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Section: X-ray Diffraction (Xrd) Studiessupporting

confidence: 82%

Section: Possible Formation Mechanismmentioning

confidence: 99%

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Singh

Sharma

Kumar

et al. 2015

Indian Journal of Materials Science

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“…A significant increase in the signal‐to‐noise ratio was observed as the N 2 flow rate increased from 0.2 to 0.6 L min −1 , the Raman peaks becoming more intense and narrow. This reveals a trend towards ordering i. e. towards proliferation of crystalline domains that are however still small enough for 0.2 and 0.4 L min −1 to lie below the detection limit of XRD . Hence, these samples are mainly amorphous retaining however a short‐range crystalline ordering that degrades with a reduction in N 2 flow rate.…”

Section: Resultsmentioning

confidence: 93%

Electrochemical Properties of APCVD α‐Fe₂O₃ Nanoparticles at 300 ^oC

et al. 2016

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The growth of hematite (Fe III oxide) by atmospheric pressure chemical vapor deposition was possible at 300 o C by controlling the nitrogen flow rate through the iron precursor bubbler. An increase of crystallinity along with the presence of compact interconnected nanoparticles was observed upon increasing the nitrogen flow rate. The amount of incorporated charge was the highest for the 0.6 L min À1 coating presenting reversibility after a period of 1400 s as obtained from chronoamperometry measurements. Additionally, the charge transfer of lithium-ions across the Fe III oxide / electrolyte interface was easier enhancing its performance presenting capacitance retention of 94 % after 500 scans. The importance of nitrogen flow rate towards the deposition of an anode with good stability and effective electrochemical behavior is highlighted.[a] Dr.

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“…Ayachi et al . synthesized α‐Fe 2 O 3 nanoplatelets by a hydrothermal process and that exhibited strong absorption of visible light and good photocatalytic degradation of methylene blue (MB) under simulated solar irradiation . Dang et al .…”

Section: Introductionmentioning

confidence: 99%

“…Alagiri et al have reported that α-Fe 2 O 3 microflower has been prepared through sol-gel method and exhibited the excellent photocatalytic perfomance by the degradation of methyl orange [27]. Ayachi et al synthesized α-Fe 2 O 3 nanoplatelets by a hydrothermal process and that exhibited strong absorption of visible light and good photocatalytic degradation of methylene blue (MB) under simulated solar irradiation [28]. Dang et al [29] prepared Fe 2 O 3 by chemical precipitation method, and the catalytic property of the precurosr of α-Fe 2 O 3 was excellent.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions

Wang

et al. 2019

Env Prog and Sustain Energy

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The removal of organic dye from aqueous solution is crucial to human health and environmental pollution. Herein, α‐Fe2O3 nanospheres were synthesized through sol–gel method and applied as adsorbents to remove methylene blue (MB) from aqueous solutions. The precursor samples annealed at different temperature were characterized by means of X‐ray diffraction and Raman spectroscopy. The results showed the as‐prepared sample was α‐Fe2O3 phase with well‐crystallized rhombohedra structure. Scanning electron microscopy and transmission electron microscope showed that the synthesized α‐Fe2O3 product was consisted of nanospheres. The Brunauer–Emmett–Teller showed the synthesized samples exhibited possessing high specific surface area with mesoporous structures. The as‐prepared synthesized α‐Fe2O3 nanospheres had excellent degraded properties; the maximum degradation rate for MB was around 94% within 10 min when the α‐Fe2O3 nanospheres content was 0.15 g L−1. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Monodisperse α-Fe2O3 nanoplatelets: Synthesis and characterization

Cited by 33 publications

References 22 publications

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Electrochemical Properties of APCVD α‐Fe₂O₃ Nanoparticles at 300 ^oC

Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions

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Monodisperse α-Fe2O3 nanoplatelets: Synthesis and characterization

Cited by 33 publications

References 22 publications

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe2O3 Microspheres

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe2O3 Microspheres

Electrochemical Properties of APCVD α‐Fe2O3 Nanoparticles at 300 oC

Synthesis of Alpha‐Fe2O3 nanospheres and its dark‐degradation for organic dye pollutions

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Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Simple Hydrolysis Synthesis of Uniform Rice-Shaped β-FeOOH Nanocrystals and Their Transformation to α-Fe₂O₃ Microspheres

Electrochemical Properties of APCVD α‐Fe₂O₃ Nanoparticles at 300 ^oC

Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions