Synthesis and characterization of mesoporous α-Fe2O3 nanoparticles and investigation of electrical properties of fabricated thick films

Mirzaei, Ali; Janghorban, K.; Hashemi, B.; Hosseini, Seyyed Reza Attarzadeh; Bonyani, Maryam; Leonardi, Salvatore Gianluca; Bonavita, A.; Neri, G.

doi:10.2298/pac1604209m

Cited by 68 publications

(33 citation statements)

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“…), there are two absorption bands correspond to a-Fe 2 O 3 and assign to metal oxygen stretching frequencies. The band at 530 cm À1 refers to Fe-O deformation in the octahedral and tetrahedral sites and another band at 455 cm À1 is attributed to Fe-O deformation in the octahedral sites of hematite[45]. Obviously, there are few peaks in the range of 800 to 2000 cm À1 only appeared in the spec-…”

mentioning

confidence: 99%

Superstructured α-Fe2O3 nanorods as novel binder-free anodes for high-performing fiber-shaped Ni/Fe battery

Liu

Cao³

et al. 2020

Science Bulletin

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confidence: 99%

Superstructured α-Fe2O3 nanorods as novel binder-free anodes for high-performing fiber-shaped Ni/Fe battery

Liu

Cao³

et al. 2020

Science Bulletin

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“…Figure 8 shows the XPS spectra of F-15. The peaks due to 2p 3/2 and 2p 1/2 were observed at binding energies of 709 and 718 eV, respectively, and spaced apart with a binding energy difference of 13 eV as observed in α-Fe 2 O 3 nanostructures [17,18]. Further, satellite shake-up peaks were observed at the higher binding energy side of the above two main peaks.…”

Section: Magnetic Propertiesmentioning

confidence: 80%

A simple solid-state method to synthesize nanosized ferromagnetic $$\upalpha $$-$$\hbox {Fe}_{2}\hbox {O}_{3}$$ with enhanced photocatalytic activity in sunlight

Shete

Fernandes

2019

Bull Mater Sci

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α-Fe 2 O 3 was synthesized by preparing a mixture of Fe(III) nitrate with urea as a precursor. The yellowish coloured precursor was calcined at 400 • C for 2 h, resulting in the formation of bright red coloured hematite. The surface properties and catalytic activity were compared with a reference sample prepared without the use of urea. It was observed that urea-induced synthesis resulted in a sample having nanosize and large lattice strain, accompanied by the development of ferromagnetic behaviour. The catalytic activity was evaluated for the decomposition of H 2 O 2 through the photo-Fenton process in sunlight. The urea-synthesized sample showed an usually large photo-Fenton effect and the catalyst could be easily recovered and reused due to its ferromagnetic behaviour.

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“…The low frequency band at ~ 566 cm − 1 refers to the Fe–O deformation in the octahedral and tetrahedral sites of hematite, giving further evidence for the formation of α–Fe 2 O 3 in good agreement with the above XRD results. The weak peak at 2900 cm − 1 is related to the C–H stretching band, which means some organic compounds are not completely removed from the samples after calcinations [40–42]. Chen et al [43] prepared hexagonal α–Fe 2 O 3 nanostructures by a facile alcohol-thermal reaction.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Ethanol Chemical Sensor Based on Novel Ag-Doped Mesoporous α–Fe2O3 Prepared by Modified Sol-Gel Process

et al. 2018

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Mesoporous α–Fe2O3 has been synthesized via a simple sol-gel procedure in the presence of Pluronic (F-127) triblock copolymer as structure directing agent. Silver (Ag) nanoparticles were deposited onto α–Fe2O3 matrix by the photochemical reduction approach. Morphological analysis revealed the formation of Ag nanoparticles with small sizes < 20 nm onto the mesoporous structure of α–Fe2O3 possessing < 50 nm semi-spherical shape. The XRD, FTIR, Raman, UV-vis, PL, and N2 sorption isotherm studies confirmed the high crystallinity, mesoporosity, and optical characteristics of the synthesized product. The electrochemical sensing toward liquid ethanol has been performed using the current devolved Ag/α–Fe2O3-modified glassy carbon electrode (GCE) by cyclic voltammetry (CV) and current potential (I-V) techniques, and the obtained results were compared with bare GCE or pure α–Fe2O3. Mesoporous Ag/α–Fe2O3 was found to largely enhance the sensor sensitivity and it exhibited excellent sensing characteristics during the precision detection of low concentrations of ethanol. High and reproducible sensitivity of 41.27 μAmM− 1 cm− 2 at lower ethanol concentration region (0.05 to 0.8 mM) and 2.93 μAmM− 1 cm− 2 at higher concentration zone (0.8 to 15 mM), with a limit of detection (LOD) of 15.4 μM have been achieved. Investigation on reaction kinetics revealed a characteristic behavior of mixed surface and diffusion-controlled processes. Detailed sensing studies revealed also that the sensitivity toward ethanol was higher than that of methanol or isopropanol. With further effort in developing the synthesis and fabrication approaches, a proper utility for the current proposed protocol for fabricating a better sensor device performance is possible.

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Synthesis and characterization of mesoporous α-Fe2O3 nanoparticles and investigation of electrical properties of fabricated thick films

Cited by 68 publications

References 0 publications

Superstructured α-Fe2O3 nanorods as novel binder-free anodes for high-performing fiber-shaped Ni/Fe battery

Superstructured α-Fe2O3 nanorods as novel binder-free anodes for high-performing fiber-shaped Ni/Fe battery

A simple solid-state method to synthesize nanosized ferromagnetic $$\upalpha $$-$$\hbox {Fe}_{2}\hbox {O}_{3}$$ with enhanced photocatalytic activity in sunlight

Highly Sensitive Ethanol Chemical Sensor Based on Novel Ag-Doped Mesoporous α–Fe2O3 Prepared by Modified Sol-Gel Process

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