Influence of the temperature in the electrochemical synthesis of cobalt ferrites nanoparticles

Mazarío, Eva; Morales, M.P.; Galindo, Rosario; Herrasti, P.; Menéndez, Nieves

doi:10.1016/j.jallcom.2011.10.073

Cited by 36 publications

(23 citation statements)

References 10 publications

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“…The electrochemical synthetic method allows for the control of the particle size by the simple variation of the reaction temperature (Mazario et al 2012). In particular, the experiments were carried out at 5, 20, 40 and 60°C.…”

Section: Nanoparticle Characterizationmentioning

confidence: 99%

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Martínez

Muñoz‐Bonilla

Mazarío

et al. 2015

Int. J. Environ. Sci. Technol.

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Well-dispersed magnetite nanoparticles of different sizes between 15 and 43 nm were synthesized by an electrochemical method in a controlled manner by simply changing the synthesis temperature. These nanoparticles were used as a reusable adsorbent to remove Cr(VI) from aqueous solution. The recovery efficiency was found to be highly dependent on environmental parameters, such as temperature and pH. In addition, it was demonstrated that the initial concentrations of both Cr(VI) and magnetite nanoparticles strongly influence the removal capability of these nanomaterials. Remarkably, the nanoparticle size has a key role on the Cr(VI) adsorption efficiency, which gradually increases as the diameter decreases due to the augmentation of the surface area. The low aggregation in the case of small particles that results from the low magnetization saturation values also contributes to the enhancement of the surface area available for Cr(VI) adsorption. In contrast, nanoparticles with larger sizes are more easily manipulated by a magnet, and the efficiency is largely maintained after five cycles. The adsorption process fits the Langmuir isotherm model well, and the reaction was found to follow a pseudo-second-order rate.

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Section: Nanoparticle Characterizationmentioning

confidence: 99%

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Martínez

Muñoz‐Bonilla

Mazarío

et al. 2015

Int. J. Environ. Sci. Technol.

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“…A series of zinc ferrites NPs with variable composition, ZnxFe(3-x)O4 (x = 0.2, 0.5, 0.8) and a particle size of ~12 nm were synthesized following an electrochemical method in aqueous medium as previously described. 33,34…”

Section: Methodsmentioning

confidence: 99%

Compositional Tuning of Light-to-Heat Conversion Efficiency and of Optical Properties of Superparamagnetic Iron Oxide Nanoparticles

Rivero

Jaque

et al. 2018

J. Phys. Chem. C

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Superparamagnetic iron oxide nanoparticles have played a fundamental role in the recent development on nanomedicine, being one of the most popular imaging and therapeutic agents. Recently, the ability of iron magnetic nanoparticles for efficient heat generation under infrared optical excitation has even boosted the interest of scientific community in this family of nanomaterials. Combination of magnetic and optical heating into a single nanostructure makes possible the development of advanced therapy treatments based on synergetic effects between these two heat sources that, in addition, could be combined with high penetration magnetic imaging. Despite of its potential, the application of iron oxide nanoparticles in photothermal treatments is limited because the lack of knowledge about the physical mechanisms behind their light-to-heat conversion capacity. In this work we have systematically investigated the photothermal efficiency of iron oxide nanoparticles with a variable composition achieved by partial replacement of iron by zinc atoms. We have experimentally found that the light-to-heat conversion efficiency gradually increases with the iron content, suggesting a dominant role of iron related transitions in the heating processes. Experimental data included in this work reveal a simple route to tailor the light activated heating processes in iron oxide nanoparticles towards fully controllable treatments.

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“…The lattice parameter calculated is very close (within a 1% deviation) to previous reports in the literature 36 in the tetrahedral position and [Fe 3+ /Fe 2+ ] in octahedral coordination in the magnetite spinel structure, respectively. In addition to the two sextets, there is one doublet with isomer shift= 0.2(1) mm/s and quadrupole splitting = 0.5(1) mm/s that may be due to the presence of some non-magnetic Fe 3+ oxide, oxyhydroxide or Fe3O4 itself with a particle size of less than 10 nm 11,37 . The effect of cooling to 77K (spectra no showed) shows up that the particle size is less than 10 nm, as the doublet was not observed at this temperature.…”

Section: Sample Characterization In the Different Configurationsmentioning

confidence: 99%

Design, Construction and Evaluation of a 3D Printed Electrochemical Flow Cell for the Synthesis of Magnetite Nanoparticles

Lozano

López

Menéndez

et al. 2018

J. Electrochem. Soc.

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A 3D-printed prototype of an electrochemical flow cell for the synthesis of superparamagnetic magnetite nanoparticles of medium size between 15 and 30 nm was constructed and its performance was evaluated. The cell consists of a series of rectangular channels in a parallel electrode arrangement. Electrolyte flows through the channels as the mL standard cell previously used. Magnetic saturation was 77.3 emu g-1 , slightly lower than the bulk material (92-100 emu g-1).

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Influence of the temperature in the electrochemical synthesis of cobalt ferrites nanoparticles

Cited by 36 publications

References 10 publications

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Compositional Tuning of Light-to-Heat Conversion Efficiency and of Optical Properties of Superparamagnetic Iron Oxide Nanoparticles

Design, Construction and Evaluation of a 3D Printed Electrochemical Flow Cell for the Synthesis of Magnetite Nanoparticles

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