One-step synthesis of hematite (α-Fe2O3) nano-particles by direct thermal-decomposition of maghemite

Darezereshki, Esmaeel

doi:10.1016/j.matlet.2010.11.030

Cited by 166 publications

(74 citation statements)

References 18 publications

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“…Magnetic saturation of samples a and b was about 35 and about 5 for samples c and d. It was very different from the magnetic saturation of bulk maghemite (~ 72). 19,20 The results showed that the magnetic saturation increased with decreasing the particles' size. As the magnetic hysteresis of samples a and b was 0, it confirmed the superparamagnetic properties of these samples.…”

Section: Vsmmentioning

confidence: 98%

Investigation and Characterization of Maghemite (γ-Fe2O3) Nanoparticles and Its Cytotoxicity Studies

Khodabakhshi¹,

Bahari²

2017

IJPER

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Objective: The expansion of wet chemical method for the synthesis of iron oxide nanoparticles with magnetic properties is reported. Methods: Iron oxide nanoparticles were investigated in the procedure using Transmission Electron Microscopy (TEM). It has been seen that the distribution size changed by changing of Molarity precursor and heating the sample. The magnetization evaluations were performed using a Vibrating Sample Magnetometer device (VSM) to specify the magnetic answer. The Thermo Gravimetric Analyses (TGA) displayed the size-dependent weight loss of the magnetic nanoparticles. In this work, the cytotoxic activity of various samples of Maghemite on cancer cell lines HELA was studied. The in vitro cytotoxicity tests were also performed to determine the cell viability as a work of size and heat of the magnetic nanoparticles. Results: The samples c and d at T=300°C had a little magnetic hysteresis that can use in cancer cure with hyperthermia therapy method. Conclusions: These samples became amorphous and they were nontoxicity.

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Section: Vsmmentioning

confidence: 98%

Investigation and Characterization of Maghemite (γ-Fe2O3) Nanoparticles and Its Cytotoxicity Studies

Khodabakhshi¹,

Bahari²

2017

IJPER

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“…The existence of the hysteresis loop below T M (AF region) shows that uncompensated spins exist at the surface of particles. The influence of the shape and microstructure of the particles on the coercivity is well known and an increase of the coercivity with increasing aspect ratio has been reported [26][27][28][29][30][31][32][33][34][39][40][41][42][43]47,55,78]. For example, in nanosized Fe, increases of aspect ratio by a factor 5 (from one to five) increases coercivity ten times [78].…”

Section: Morphologymentioning

confidence: 99%

“…A recent paper by Gupta et al reported on hematite rods with nonzero coercivity H C = 107 Oe and remanent magnetization M r = 0.064 emu/g at room temperature, as well as dependence of the Morin transition on the applied magnetic field [48]. Darezereshki prepared hematite nano-particles by direct thermal-decomposition of maghemite with coercivity H C = 101 Oe and remanent magnetization M r = 0.00654 emu/g at room temperature [30], whereas Tsuzuki et al prepared hematite nano-platelets by mechanochemical/thermal processing with H C = 160 Oe and M r = 0.2 emu/g at room temperature [27]. Moreover, the magnetic properties are strongly affected by the synthetic conditions and the search for methods capable of tailoring these parameters is a current research field.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles

Tadić

Čitaković

Panjan

et al. 2011

Journal of Alloys and Compounds

115

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“…The shift in the peaks of Zn-O peak and the Fe-O may be attributed to the change in particle size and hence the metal ion-oxygen bond distances (Thomas and George 2009; Ladgaonkar et al 2002). The peaks at around 3400-3500 cm -1 in the FTIR spectra can be ascribed to the -OH group of water adsorbed on the surface of the nanopowders (Sumetha 2008;Darezereshki 2011).…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity of nanocrystalline ZnO, α-Fe2O3 and ZnFe2O4/ZnO

Ahmed¹,

Chandrasekhar

Jahagirdar³

et al. 2015

Appl Nanosci

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Nanocrystalline powders of ZnO, a-Fe 2 O 3 and ZnFe 2 O 4 /ZnO were prepared by solution combustion method. The characterization of the nano powders was done by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The ZnO and a-Fe 2 O 3 nanopowders exhibited the wurtzite and hexagonal phases, respectively. The PXRD pattern of ZnFe 2 O 4 /ZnO indicated the spinel phase of zinc ferrite and wurtzite phase of zinc oxide. The three nanopowders were used as photocatalysts for the removal of the azodye brilliant yellow (BY) from its aqueous solution. A comparison of the results indicated that ZnFe 2 O 4 /ZnO showed better photocatalytic activity for the removal of BY than ZnO and a-Fe 2 O 3 . This was attributed to the synergistic effect between ZnFe 2 O 4 and ZnO resulting in better charge separation and reducing the electron-hole recombination. The photocatalytic activity followed the order: ZnO \ a-Fe 2 O 3 \ ZnFe 2 O 4 /ZnO.

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One-step synthesis of hematite (α-Fe2O3) nano-particles by direct thermal-decomposition of maghemite

Cited by 166 publications

References 18 publications

Investigation and Characterization of Maghemite (γ-Fe2O3) Nanoparticles and Its Cytotoxicity Studies

Investigation and Characterization of Maghemite (γ-Fe2O3) Nanoparticles and Its Cytotoxicity Studies

Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles

Photocatalytic activity of nanocrystalline ZnO, α-Fe2O3 and ZnFe2O4/ZnO

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