Structural, magnetic and Raman study of CoFe2O4@C core–shell nanoparticles

Bakhshi, Hamed; Shokuhfar, Ali; Afghahi, Seyyed Salman Seyyed

doi:10.1016/j.ceramint.2015.05.009

Cited by 14 publications

(2 citation statements)

References 53 publications

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“…Figure S2 displays the FT-IR transmission spectrum within a wavenumber scale of 400 and 4000 cm −1 for Cu 0.1 Co 0.9 Fe 2 O 4 nano systems, which is in the FT-IR range of the spectra for all tested samples that has three specific metal/oxygen bond vibrations labelled υ 1 , υ 2 , and υ 3 . The lower frequency peaks (υ 1 = 415 cm −1 ) and (υ 2 = 480 cm −1 ) are recognized by bivalent tetrahedral A-site metal-O 2 group chelates and extending vibrations for tri-valent metal/oxygen (Fe 3+ -O 2− ) bonds within an octahedral B-site, respectively [38]. The higher frequency peaks (υ 3 = 587 cm −1 ) are associated with an extending tri-valent metal/oxygen (Fe 3+ -O 2− ) bond vibration in an octahedral B-site structure [39].…”

Section: Analysis Of Infrared Spectroscopymentioning

confidence: 99%

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Alsaedi,

Abu Al-Ola,

Alhaddad

et al. 2024

Polymers

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Nanoparticles of spinel ferrites with a composition of Co0.9Cu0.1Fe2O4 (AM NPs) were effectively synthesized via a hydrothermal route. The structure of ferrite nanoparticles was characterized with X-ray diffraction, which showed a single cubic spinel phase. Energy-dispersive X-ray (EDX) spectroscopy and field emission-scanning electron microscopy (FE-SEM) were employed to analyse elemental composition and surface morphology, respectively. Moreover, the effects of the Co0.9Cu0.1Fe2O4 on the morphology of [PLA = polylactic acid] nanocomposites were examined through polarized light optical microscopy (POM) and X-ray diffraction (XRD). The thermal behaviours for tested samples were studied through [DSC = differential scanning calorimetry] and [TGA = thermal gravimetric analysis]. A great number of minor PLA spherulites were detected using POM in the presence of the Co0.9Cu0.1Fe2O4 ceramic magnetic nanoparticles (AM), increasing with AM nanoparticle contents. X-ray diffraction (XRD) analysis showed that the presence of nanoparticles led to an increase in the intensity of diffraction peaks. The DSC findings implied that the crystallization behaviours for the efficient PLA as well as its nanocomposites were affected by the addition of AM nanoparticles. They act as efficient nucleating agents because they shift the temperature of crystallization to a lower value. The Avrami models were used to analyse kinetics data. The experimental data were well described using the Avrami method for all samples tested. The addition of AM to the PLA matrix resulted in a decrease in the crystallization half-time t1/2 values, indicating a faster crystallization rate. TGA data showed that the occurrence of AM nanoparticles decreased the thermal stability of PLA.

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Section: Analysis Of Infrared Spectroscopymentioning

confidence: 99%

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Alsaedi,

Abu Al-Ola,

Alhaddad

et al. 2024

Polymers

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“…On the other hand, various factors such as particle size and surface to volume ratio affect the magnetic properties of manganese-zinc ferrite nanoparticles [11]. Some oxide ceramics, due to properties such as unparalleled spin of electrons, chemical stability, and electrical resistance, are classified as magnetic materials [12]. Glycine, which is used as a fuel in the process of nanoparticle synthesis, is compatible with the environment [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nano Mn-Zn ferrites by gel combustion method with three different fuels and investigation of their structure and properties

Vahdati

Sedghi

2020

Materials Science-Poland

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The purpose of studying the properties of zinc-manganese nanoferrite was to compare organic fuels that were produced in conditions created by the auto gel combustion method, using citric acid, glycine, and urea with different pH values: (citric acid = 6, glycine = 3 and urea = 0). The samples were prepared in stoichiometric ratios to gain Mn0:5Zn0:5Fe2O4, and all the samples were calcined in the same condition (500 °C and 30 minutes). It should be noted that the entire process of synthesis was photographed to analyze the effect of fuels during the combustion process. Combustion reactions were studied by simultaneous thermal analysis (STA), FT-IR spectroscopy, and X-ray diffraction (XRD), also the Rietveld method was used to determine the type and amount of crystalline phases. Magnetic properties of the samples were measured by vibration sample magnetometer (VSM), and their morphology and powder agglomeration was observed by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Superior magnetic properties of the sample synthesized with glycine were achieved. Urea gave the smallest particle size, while citric acid produced intermediate properties.

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Template‐Assisted Synthesis of Honeycomb‐Like CoFe₂O₄/CNTs/rGO Composite as Anode Material for Li/Na‐Ion Batteries

et al. 2019

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CoFe2O4 is a fascinating anode material due to its high theoretical capacity. However, the low electronic conductivity, limited electrochemical kinetics and huge volume expansion lead to poor electrochemical performance. Here, the CoFe2O4/CNTs/rGO ternary composite with a honeycomb‐like structure (PS‐CFO/CNTs/rGO) has been synthesized via a spray drying method assisted by polystyrene (PS) soft template. The rational 3D porous structure design not only enhances the transport capacity of Li/Na ions, but also provides buffer spaces for alleviating volume expansion, resulting in rapid electrochemical kinetics and improved electrode integrity during cycling. In particular, to improve the electrochemical performance, a facile pre‐treatment process combining heat‐treatment and pre‐sodiation treatment is first developed for the anode materials of sodium‐ion batteries (SIBs). As a result, at 1 A g−1 after 365 cycles, the pronounced capacity of PS‐CFO/CNTs/rGO composite can be maintained at 750 mAh g−1 for lithium‐ion batteries (LIBs), and after 5000 cycles, maintained at 195 mAh g−1 for the SIBs.

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Structural, magnetic and Raman study of CoFe2O4@C core–shell nanoparticles

Cited by 14 publications

References 53 publications

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Synthesis of nano Mn-Zn ferrites by gel combustion method with three different fuels and investigation of their structure and properties

Template‐Assisted Synthesis of Honeycomb‐Like CoFe₂O₄/CNTs/rGO Composite as Anode Material for Li/Na‐Ion Batteries

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Structural, magnetic and Raman study of CoFe2O4@C core–shell nanoparticles

Cited by 14 publications

References 53 publications

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Effect of Nano Spinel Ferrites Co0.9Cu0.1Fe2O4 on Non-Isothermal Cold Crystallization Behaviours and Kinetics of Its Composites with Polylactic Acid

Synthesis of nano Mn-Zn ferrites by gel combustion method with three different fuels and investigation of their structure and properties

Template‐Assisted Synthesis of Honeycomb‐Like CoFe2O4/CNTs/rGO Composite as Anode Material for Li/Na‐Ion Batteries

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Template‐Assisted Synthesis of Honeycomb‐Like CoFe₂O₄/CNTs/rGO Composite as Anode Material for Li/Na‐Ion Batteries