Exploring structural and magnetic properties of nanocrystalline iron oxide synthesized by autocombustion method

Rajpure, K.Y.

doi:10.1016/j.spmi.2014.11.012

Cited by 19 publications

(8 citation statements)

References 43 publications

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“…Similar results were reported by Toniolo et al and Rajpure, who used urea or glycine as fuels. It was shown that the contents of α and γ phases in the products could be tuned by changing the urea to iron nitrate ratio.…”

Section: Solution Combustion-derived Materialssupporting

confidence: 90%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol-gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual properties are outlined. To demonstrate the versatility of the approach, several application categories of SCS produced materials, such as for energy conversion and storage, optical devices, catalysts, and various important nanoceramics (e.g., bio-, electro-, magnetic), are discussed.

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Section: Solution Combustion-derived Materialssupporting

confidence: 90%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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“…The magnetic properties of γ-Fe 2 O 3 /SiO 2 -STZ were analyzed by VSM experiments (Figure 3). The saturation magnetization of the prepared nanocore-shell structure was 58.2 emu g −1 , corroborating its outstanding magnetic characteristics, which allow its magnetic separation as can be observed in Figure 3, Inset [28].…”

Section: Methodssupporting

confidence: 71%

Versatile Sulfathiazole-Functionalized Magnetic Nanoparticles as Catalyst in Oxidation and Alkylation Reactions

et al. 2019

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Catalyst design and surface modifications of magnetic nanoparticles have become attractive strategies in order to optimize catalyzed organic reactions for industrial applications. In this work, silica-coated magnetic nanoparticles with a core-shell type structure were prepared. The obtained material was successfully functionalized with sulfathiazole groups, which can enhance its catalytic features. The material was fully characterized, using a multi-technique approach. The catalytic performance of the as-synthesized material was evaluated in 1) the oxidation of benzyl alcohol to benzaldehyde and 2) the microwave-assisted alkylation of toluene with benzyl chloride. Remarkable conversion and selectivity were obtained for both reactions and a clear improvement of the catalytic properties was observed in comparison with unmodified γ-Fe2O3/SiO2 and γ-Fe2O3. Noticeably, the catalyst displayed outstanding magnetic characteristics which facilitated its recovery and reusability.

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“…The decrease in value of saturation magnetization after composite may be due to decrease in ferromagnetic components and the existence of the antiferromagnetic TiO 2 NTs phase. It may also be caused by the defects and disorders in the structure [32].…”

Section: Magnetization Studiesmentioning

confidence: 99%

Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G

Pang

Lim

Ong

et al. 2016

Ultrasonics Sonochemistry

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In this work, γ-Fe2O3 and TiO2 NTs/γ-Fe2O3 composites with good magnetism and sonocatalytic activity were prepared by a facile polyol method and utilize the principle of isoelectric point method, respectively. The structural and magnetic features of the prepared calcined γ-Fe2O3 and composite catalysts were investigated by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), surface analysis, UV-Vis diffuse reflectance spectra (UV-Vis DRS), vibrating sample magnetometry (VSM) and zeta potential analysis. The effects of calcination temperature on γ-Fe2O3 phase variation, physical properties and sonocatalytic properties were investigated. The porosity, specific surface area, band gap energy and sonocatalytic activity of γ-Fe2O3 were gradually decreased with calcination temperature increased. TiO2 NTs/γ-Fe2O3 with appropriate composition and specific structural features possess synergetic effects such as efficient separation of charge carriers and hydroxyl radicals produced by heterogeneous fenton and fenton-like reactions. This enhanced the sonocatalytic activity for the degradation of Orange G under ultrasonic irradiation. The sonocatalytic reactions obeyed pseudo first-order kinetics. All these information provide insight into the design and development of high-efficiency catalyst for wastewater treatment.

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Exploring structural and magnetic properties of nanocrystalline iron oxide synthesized by autocombustion method

Cited by 19 publications

References 43 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Versatile Sulfathiazole-Functionalized Magnetic Nanoparticles as Catalyst in Oxidation and Alkylation Reactions

Synthesis, characteristics and sonocatalytic activities of calcined γ-Fe2O3 and TiO2 nanotubes/γ-Fe2O3 magnetic catalysts in the degradation of Orange G

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