Synthesis of Nanosize‐Necked Structure α‐ and γ‐Fe2O3 and its Photocatalytic Activity

Apte, Sanjay K.; Naik, Sonali D.; Sonawane, Ravindra S.; Kale, Bharat B.; Baeg, Jin‐Ook

doi:10.1111/j.1551-2916.2006.01424.x

Cited by 145 publications

(66 citation statements)

References 18 publications

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“…Although the neck-structured property of γ-Fe 2 O 3 and α-Fe 2 O 3 nanoparticles with photocatalytic activity synthesized by combustion method have already been reported by Apte et al [21] whereas we first time report the synthesis of neck-structured Fe 3 O 4 , γ-Fe 2 O 3 and α-Fe 2 O 3 nanoparticles with hyperthermia ability by simple hydrothermal decomposition.…”

Section: Shape Analysis By Fe-sem and Temmentioning

confidence: 52%

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe3O4, γ-Fe2O3 and α-Fe2O3) Nanoparticles

et al. 2011

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Novel neck-structured Fe3O4, γ-Fe2O3 and α-Fe2O3 magnetic nanoparticles were successfully prepared by a modified hydrothermal method. Ferrous chloride tetrahydrate was solely used as a precursor for the novel nanomaterials. The X-ray diffractometric study revealed the purity of the nanomaterials thus synthesized. All of the products were characterized using a field-emission scanning electron microscope (FE-SEM) and a transmission electron microscope (TEM) for the particle size and morphology. Neck-structured particle morphology was observed for the first time in all of iron oxides with magnetic properties. The particle size observed was 50–60 nm. The synthesized nanomaterials showed excellent magnetization values when magnetic hysteresis loops were measured using a superconducting quantum interference device (SQUID). Moreover, the as-prepared magnetic nanoparticles suspensions showed significant temperature increments under an AC (alternating current) magnetic-field induction condition at room temperature which indicates the hyperthermia feasibility. Keywords: Magnetic materials; Neck-structured; Hyperthermia; Heat dissipation. © 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v4i1.8727J. Sci. Res. 4 (1), 99-107 (2012)

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Section: Shape Analysis By Fe-sem and Temmentioning

confidence: 52%

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe3O4, γ-Fe2O3 and α-Fe2O3) Nanoparticles

et al. 2011

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“…Such behavior is ascribed to surface effects in nanoparticles. The values of Ms of ZnFe2O4 particles was much higher than the bulk Ms values of 5 emu/g [37]. Such behavior is related to cation distribution, which can change from a normal spinel structure to a mixed spinel structure [28].…”

Section: The Magnetization Measurements (Vsm Analysis)mentioning

confidence: 98%

“…Figure 4 [36,37]. The peaks at 1380 and 1600 cm −1 are attributed to the C=O stretching modes, respectively, because of the coordination of the carboxylate groups of the citric acid by metal ions.…”

Section: The Magnetization Measurements (Vsm Analysis)mentioning

confidence: 99%

Manganese and Zinc Spinel Ferrites Blended with Multi-Walled Carbon Nanotubes as Microwave Absorbing Materials

et al. 2017

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Magnetic and dielectric materials can be blended to enhance absorption properties at microwave frequencies, although the materials may have relatively weak attenuation capabilities by themselves. The specific goal of this work is to enhance microwave absorption properties of materials with interesting dielectric behavior by blending them with magnetic materials based on transition metals. The synthesized Mn 1−x Zn x Fe 2 O 4 (x = 0.0 and 1.0) spinel ferrite nanoparticles (MZF NPs) were blended with commercial multi-walled carbon nanotubes (MWCNTs) in various proportions with a binder matrix of paraffin. This simple and efficient process did not cause a significant variation in the energy states of MWCNTs. MZF NPs were synthesized with a citric acid assisted sol-gel method. Their electromagnetic characteristics and microwave absorption properties were investigated. These properties were derived from the microwave scattering parameters measured via the transmission line technique by using a vector network analyzer (VNA) in conjunction with an X band waveguide system. The return loss (RL) values of the samples were obtained from the electromagnetic constitutive parameters (permittivity and permeability). The results indicate that the minimum RL value and the bandwidth change significantly with the amount of ferrite material in the blend. These results encourage further development of MWCNTs blended with ferrite nanoparticles for broadband microwave applications.

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“…Necked structure morphology of g-Fe 2 O 3 was obtained by Apte et al [38] from the combustion reaction of ferric nitrate. Conventional batch methodology techniques reported for production of nanoparticles generate the large-size particles with wide size distribution due to the lack of precise control on mixing, nucleation, and growth process during the particle formation [39].…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Properties of Colloids in a Continuous‐Flow Microreactor System

et al. 2015

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The effect of reactant concentration, flow rate, and surfactant type on the size and distribution of synthesized nanoparticles was studied. Two tubular microreactors made of polyvinyl chloride (PVC) and stainless steel (SS) were used for production of iron oxide nanoparticles from FeCl 3 and NaBH 4 as precursors by a chemical reduction route. The diameter of the microreactor and other process parameters were found to influence the size and size distribution of iron oxide nanoparticles. The axial dispersion in the PVC microreactor was less than in the SS microreactor due the large ratio of microreactor volume to flow rate. The formation of iron oxide was detected by Fourier transform infrared, X-ray diffraction, and field emission scanning electron microscopy (FESEM). Synthesis of stable colloidal iron oxide nanoparticles with narrow size distribution in this continuous-flow microreactor system was confirmed.

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Synthesis of Nanosize‐Necked Structure α‐ and γ‐Fe₂O₃ and its Photocatalytic Activity

Cited by 145 publications

References 18 publications

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Manganese and Zinc Spinel Ferrites Blended with Multi-Walled Carbon Nanotubes as Microwave Absorbing Materials

Effect of Process Parameters on Properties of Colloids in a Continuous‐Flow Microreactor System

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Synthesis of Nanosize‐Necked Structure α‐ and γ‐Fe2O3 and its Photocatalytic Activity

Cited by 145 publications

References 18 publications

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, &gamma;-Fe<sub>2</sub>O<sub>3</sub> and &alpha;-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, &gamma;-Fe<sub>2</sub>O<sub>3</sub> and &alpha;-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Manganese and Zinc Spinel Ferrites Blended with Multi-Walled Carbon Nanotubes as Microwave Absorbing Materials

Effect of Process Parameters on Properties of Colloids in a Continuous‐Flow Microreactor System

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Synthesis of Nanosize‐Necked Structure α‐ and γ‐Fe₂O₃ and its Photocatalytic Activity

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles

Hydrothermal Novel Synthesis of Neck-structured Hyperthermia-suitable Magnetic (Fe<sub>3</sub>O<sub>4</sub>, γ-Fe<sub>2</sub>O<sub>3</sub> and α-Fe<sub>2</sub>O<sub>3</sub>) Nanoparticles