Economically attractive route for the preparation of high quality magnetic nanoparticles by the thermal decomposition of iron(III) acetylacetonate

Effenberger, Fernando Bacci; Couto, Ricardo Alexandre Alves de; Kiyohara, Pedro Kunihiko; Machado, Giovanna; Masunaga, Sueli H.; Jardim, Renato de Figueiredo; Rossi, Liane M.

doi:10.1088/1361-6528/aa5ab0

Cited by 55 publications

(28 citation statements)

References 40 publications

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“…The saturation magnetization (Ms) was 82 and 79 emu g −1 for as-prepared and calcined Fe 3 O 4 @SiO 2 samples, respectively. In addition, the magnetic size distributions (〈d〉 ~ 6 nm and σ = 0.4) estimated from the Langevin function fitted to M(H) curves, a procedure found elsewhere [23], are also similar for both samples. Therefore, the magnetic core is preserved after thermal treatment.…”

Section: Silica-coated Magnetite: Thermal Stabilitysupporting

confidence: 63%

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Vono

Damasceno

Matos

et al. 2017

Pure and Applied Chemistry

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Magnetic separation can be considered a green technology because it is fast, efficient, consumes low energy, and minimizes the use of solvents and the generation of waste. It has been successfully used in laboratory scale to facilitate supported catalysts' handling, separation, recovery, and recycling. Only few materials are intrisically magnetic, hence the application of magnetic materials as catalyst supports has broaden the use of magnetic separation. Iron oxides, silica-coated iron oxides, and carbon-coated-cobalt are among the most studied catalyst supports; however, other metal oxide coatings, such as ceria and titania, are also very interesting for application in catalysis. Here we report the preparation of magnetically recoverable magnetic supports containing silica, ceria, and titania. We found that the silica shell protects the iron oxide core and allows the crystalization of ceria and titania at high temperature without compromising the magnetic properties of the catalyst supports.

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Section: Silica-coated Magnetite: Thermal Stabilitysupporting

confidence: 63%

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Vono

Damasceno

Matos

et al. 2017

Pure and Applied Chemistry

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show abstract

“…The selected literature was classified into four main groups:Methods of synthesis of IONPs [13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56]Characterization of IONPs [57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,…”

Section: Resultsmentioning

confidence: 99%

Magnetic Iron Oxide Nanoparticles: Synthesis, Characterization and Functionalization for Biomedical Applications in the Central Nervous System

et al. 2019

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Magnetic Nanoparticles (MNPs) are of great interest in biomedicine, due to their wide range of applications. During recent years, one of the most challenging goals is the development of new strategies to finely tune the unique properties of MNPs, in order to improve their effectiveness in the biomedical field. This review provides an up-to-date overview of the methods of synthesis and functionalization of MNPs focusing on Iron Oxide Nanoparticles (IONPs). Firstly, synthesis strategies for fabricating IONPs of different composition, sizes, shapes, and structures are outlined. We describe the close link between physicochemical properties and magnetic characterization, essential to developing innovative and powerful magnetic-driven nanocarriers. In conclusion, we provide a complete background of IONPs functionalization, safety, and applications for the treatment of Central Nervous System disorders.

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“…Some key aspects of semiconductor materials' properties are noted to be a crucial matter for the device performance as different parameters in synthesis can result in different physical properties of materials. The morphology, size, crystallinity, and optical properties are needed to be considered, since those characteristics can be affected by the procedure of materials preparation, the concentration of precursors [21][22][23], surfactant selection, and solvent selection [24,25]. The post-treatment after the 3 electrolyte and Pt/Fluorine-doped tin oxide glass (Pt-FTO) as a counter electrode, we obtained the best performance from Bi 7 O 9 I 3 as the annealed BiOI films at 300 • C. Based on this result, we expect that this study can open future work in photovoltaic application based on the BiOI.…”

Section: Introductionmentioning

confidence: 99%

Study of Annealing Temperature Effect on the Photovoltaic Performance of BiOI-Based Materials

et al. 2019

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Bismuth oxyiodide (BiOI) is expected to be promising material for photovoltaic devices since it has good activity under the visible range. Here, we studied the annealing treatment on BiOI and its effect on the photovoltaic application. Firstly, the synthesized BiOI from Bi(NO3)3 and KI was annealed at varied temperatures (100–550 °C). The structural investigation by X-ray diffraction and Raman spectroscopy analysis was supported with morphology and optical analysis by scanning electron microscope (SEM) and UV-Visible spectroscopy. Due to the heating treatment, it could result in iodine-deficient bismuth-based materials, namely Bi7O9I3, Bi5O7I, and β-Bi2O3. Secondly, the photovoltaic test measurement was performed by solar simulator air mass (AM) 1.5 illumination which presented the current-voltage curve from each material. The enhancement of photovoltaic performance was given by the increase of temperature up to 300 °C. At that temperature, the performance of the device which consisted of Bi7O9I3 achieved three times higher efficiency than the annealed parent BiOI at 100 °C. Hence, the structural changing owing to the oxygen addition to BiOI structure had an impact on the photoelectrochemical cell. Based on this work, it is possible to attempt BiOI derivation with suitable holes and electron transport layers for better photovoltaic performance.

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Economically attractive route for the preparation of high quality magnetic nanoparticles by the thermal decomposition of iron(III) acetylacetonate

Cited by 55 publications

References 40 publications

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Magnetic Iron Oxide Nanoparticles: Synthesis, Characterization and Functionalization for Biomedical Applications in the Central Nervous System

Study of Annealing Temperature Effect on the Photovoltaic Performance of BiOI-Based Materials

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