Thermal treatment of magnetite nanoparticles

Kalska-Szostko, B.; Wykowska, U.; Satuła, D.; Nordblad, Per

doi:10.3762/bjnano.6.143

Cited by 63 publications

(41 citation statements)

References 49 publications

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“…Even if FESEM analysis evidenced the presence of magnetite nucleated around metallic silver particles, which can have a nucleating effect [34], it seems that silver influenced the place of nucleation and the shape of crystals but not the quantity of crystalline phase. The amount of magnetite observed in the bulk samples (both SC45 and Ag-SC45) is slightly lower respect the samples in powders form; these results can be explained considering that bulk samples were subjected to an annealing at 600°C and at this temperature the transformation magnetite-hematite can occur [41]. In any case, the magnetite amount is in accordance with the results obtained by Bruno et al [16] for the pure SC45.…”

Section: Characterizations Of Ag-sc45supporting

confidence: 90%

Multifunctional ferrimagnetic glass–ceramic for the treatment of bone tumor and associated complications

et al. 2017

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Silver-containing ferrimagnetic glass-ceramic (Ag-SC45) was synthesized by means of melt and quenching technique. Samples were subjected to morphological, compositional, structural analyses, ability to generate heat, magnetic measurements at high and low magnetic field and antibacterial test using S. aureus strain. The influence of silver introduction and the effect of annealing process were investigated. Morphological, compositional and structural analyses evidenced the formation of metallic silver particles embedded in the glass-ceramic. The hysteresis cycles showed slight differences in the hysteresis cycle area ratio and coercive field values as a function of the annealing treatment and of silver presence, while no difference was evidenced in the specific power loss. All samples demonstrated the ability to produce heat when exposed to an alternating magnetic field. Finally, preliminary antibacterial test showed that Ag-SC45 samples not subjected to annealing possessed an antibacterial effect.

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Section: Characterizations Of Ag-sc45supporting

confidence: 90%

Multifunctional ferrimagnetic glass–ceramic for the treatment of bone tumor and associated complications

et al. 2017

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“…Dehydration of coagulated complexes based on iron hydroxides or/and oxyhydroxides is followed by iron oxide formation [6,8]. High temperature dehydration and oxidation of iron oxides, hydroxides are followed by several temperature-dependent phase interchanges between phases hematite-maghemite-magnetite [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…In oxygen-rich atmosphere, magnetite usually goes through several temperature-dependent stages during rapid oxidation [10][11][12] It can be concluded that increasing temperature favours the oxidative magnetite/maghemite transformation toward hematite formation.…”

Section: Introductionmentioning

confidence: 99%

Recycling of a wastewater to iron oxide micro structures

Horváth¹,

Simo²,

Šalgó³

et al. 2019

Environ. Res. Commun.

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The proposed work describes new perspectives for recycling of a salty industrial wastewater to microstructured iron oxides with capturing potential for minor carbon-and metallic contaminations. Byproducts generated by electrochemical treatment of a rubber wastewater with sacrificial steel anode were separated, dried, desalinated, and thermally processed at 800 and 1100°C in a nitrogen atmosphere to investigate the effects of chemically bound oxygen on iron oxide formation. The obtained powder products were different phases of iron oxides, such as hematite, maghemite, magnetite; depending on the annealing temperature. All of the phases are interesting from a recycling point of view, the microstructure, elementary composition and crystallinity of the solid products before and after thermal treatment were investigated via SEM-EDX and PXRD techniques.

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“…Thermal decomposition of all sample at this temperature are decreasing, this shows that all the decomposition stopped. In addition, at temperature 500°C, the magnetite is changed into hematite 48 .…”

Section: -Gptms-argmentioning

confidence: 99%

Preparation of L-Arginine-Modified Silica-Coated Magnetite Nanoparticles for Au(III) Adsorption

Amaria¹,

Nuryono²,

Suyanta³

2017

Orient. J. Chem

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L-arginine-modified silica-coated magnetite nanoparticles (Fe 3 O 4 /SiO 2 -GPTMS-Arg) have been synthesized by sol-gel process for adsorption of Au(III) ion in aqueous solution. Modification of L-arginine on silica coated magnetite through a coupling agent of 3-glycidoxypropyl-trimethoxysilane (GPTMS) was performed in a various mole ratio of GPTMS:Arg 1:0; 1:1; 1:2 and 1:3. The products of Fe 3 O 4 /SiO 2 -GPTMS-Arg were characterized with XRD, FTIR, EDX, TGA, and Kjeldahl methods. The results showed that based on characterization data Fe 3 O 4 /SiO 2 -GPTMS-Arg has been successfully synthesized with the optimum mole ratio of 1:2. The optimum adsorption of Au(III) occurs at pH 3 and contact time of 60 min. The adsorption capacity followed Langmuir isotherm model was found 0.638 mmol.g -1 for the Fe 3 O 4 /SiO 2 -GPTMS-Arg 1:2. Fe 3 O 4 /SiO 2 -GPTMS-Arg nanoparticles show a potential adsorbent for an effective Au(III) ion removal.

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Thermal treatment of magnetite nanoparticles

Cited by 63 publications

References 49 publications

Multifunctional ferrimagnetic glass–ceramic for the treatment of bone tumor and associated complications

Multifunctional ferrimagnetic glass–ceramic for the treatment of bone tumor and associated complications

Recycling of a wastewater to iron oxide micro structures

Preparation of L-Arginine-Modified Silica-Coated Magnetite Nanoparticles for Au(III) Adsorption

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