Synthesis, optical and magnetic properties of α-Fe2O3 nanoparticles with various shapes

Zhang, Xin; Niu, Yongan; Li, Yao; Hou, Xiaoning; Wang, Yibo; Bai, Rui; Zhao, Jiupeng

doi:10.1016/j.matlet.2013.02.070

Cited by 88 publications

(28 citation statements)

References 18 publications

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“…Regardless of the different additives, XRD patterns over fused Fe-based catalysts in Figure 1 [37]. The absence of additives reflection peaks can be considered as resulting from these three factors: (1) these additives are amorphous over fused samples; (2) Fe2O3 forms solid solution with these additives oxides with the structure of hematite; (3) additives forms very fine oxides particles beyond the detection limit of XRD.…”

Section: Characterization Of Fresh Catalystsmentioning

confidence: 99%

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Reddy

Harb

et al. 2017

Applied Catalysis B: Environmental

209

103

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Highlights  Regardless preparation methods and Fe loading, Fe-Al2O3 catalysts showed the best CMD performance.  The selective formation of CNTs over Fe-Al2O3 catalysts is also speculated to be vital for their good CMD activity.  The graphite is proposed to be spurted out from an unstable over-stoichiometric iron carbide Fe3C1+x decomposition back to Fe3C and C.  At a low SV of 1.875 L/gcat•h, this catalyst showed a stable methane conversion of c.a. 70% for as long as 400 min.

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Section: Characterization Of Fresh Catalystsmentioning

confidence: 99%

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Reddy

Harb

et al. 2017

Applied Catalysis B: Environmental

209

103

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“…It is not only the temperature but also the morphology that seems to significantly influence the magnetic properties. The increased value of the coercivity could be attributed to the magnetic spin orientation along the axis that eases magnetization 19 . On account of the grain boundaries and free surface, the magnetic properties improved 20 .…”

Section: Magnetic Measurementsmentioning

confidence: 99%

Preparation and Characterization of Nickel ferrite Nanoparticles via Co-precipitation Method

2018

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Nickel ferrite (NiFe 2 O 4 ) nanoparticles were synthesized using co-precipitation method. The X-ray diffraction (XRD) pattern was used to determine the structure of NiFe 2 O 4 nanoparticles. The presence of NiFe 2 O 4 nanoparticles was confirmed by the FT-IR spectrum. The details of the surface morphology of NiFe 2 O 4 nanoparticles were obtained by Scanning Electron Microscopic analysis. The particle size of the NiFe 2 O 4 nanoparticles could be determined by means of Transmission Electron Microscopy. This work aimed at the investigation of the dielectric properties such as the dielectric loss and the dielectric constant of NiFe 2 O 4 nanoparticles at varied frequencies and temperatures. In addition, the magnetic properties of the NiFe 2 O 4 nanoparticles were studied.

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“…It is widely used in catalysts, 1 batteries, 2 water treatment 3 and other fields. [4][5][6] In recent years, considerable efforts have been made for the preparation of nanostructured α-Fe 2 O 3 particles. Since the chemical and physical properties of α-Fe 2 O 3 can depend on the shape and/or dimensions, the α-Fe 2 O 3 nanostructures with various morphologies, including nanotubes, 7 nanoellipsoids and nanospheres, 8 nanofibers, 9 platelets, 10 nanorings, 11 nanoflowers 12 and nanowires, 13 have been successfully prepared.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of monodisperse α-Fe₂O₃ nanocubes

Liu

Wang

et al. 2015

Materials Research Innovations

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Monodisperse α-Fe 2 O 3 nanocubes with a mean size of 70 nm have been successfully synthesised by a hydrothermal process using Fe(NO 3 ) 3 and NaOH as raw materials. The morphology and nanostructure of products were characterised by X-ray diffraction, transmission electron microscopy and field-emission scanning electron microscopy. The results revealed that reaction temperature had a remarkable effect on the morphology of the α-Fe 2 O 3 nanoparticles. Furthermore, α-FeOOH was generated as the intermediate during the hydrothermal dehydration reaction and the nanocrystals experienced a complex time-dependent evolution. For the hydrothermal synthesis of α-Fe 2 O 3 nanocubes, the optimum temperature and reaction time were 180°C and 6 hours, respectively. In addition, the products obtained rapid purification via a heat treatment at 600°C for 1 hour.

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Synthesis, optical and magnetic properties of α-Fe2O3 nanoparticles with various shapes

Cited by 88 publications

References 18 publications

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Preparation and Characterization of Nickel ferrite Nanoparticles via Co-precipitation Method

Hydrothermal synthesis of monodisperse α-Fe₂O₃ nanocubes

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Synthesis, optical and magnetic properties of α-Fe2O3 nanoparticles with various shapes

Cited by 88 publications

References 18 publications

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Fe catalysts for methane decomposition to produce hydrogen and carbon nano materials

Preparation and Characterization of Nickel ferrite Nanoparticles via Co-precipitation Method

Hydrothermal synthesis of monodisperse α-Fe2O3 nanocubes

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Product

Resources

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Hydrothermal synthesis of monodisperse α-Fe₂O₃ nanocubes