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Pahuja M, De I, Ahmed Siddiqui S, Das S, Afshan M, Alam K, Riyajuddin S, Rani S, Ghosh R, Rani D, Gill K, Singh M, Ghosh K. Seamless Architecture of Porous Carbon Matrix Decorated with Ta2O5 Nanostructure-based Recyclable Photocatalytic Cartridge for Toxicity Remediation of Industrial Dye Effluents. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Nikmanesh H, Jaberolansar E, Kameli P, Varzaneh AG. Effect of praseodymium in cation distribution, and temperature-dependent magnetic response of cobalt spinel ferrite nanoparticles. NANOTECHNOLOGY 2022; 33:275709. [PMID: 35299157 DOI: 10.1088/1361-6528/ac5ee4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
This work reports cation distribution, magnetic, structural, and morphological studies of rare-earth Pr doped cobalt ferrite nanoparticles CoFe2-xPrxO4(x= 0, 0.02, 0.04, 0.06 at%) fabricated by sol-gel auto-combustion method. X-ray diffraction analysis, field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and Fourier-transform infrared (FTIR) microscopy were utilized to study the structural and morphological characteristics of the prepared samples. Rietveld refinement by the Material Analyses Using Diffraction (MAUD) software showed the formation of mono-phase cubic spinel structure with Fd-3m space group; however, there was a trace of impure PrFeO3phase for the sample CoFe1.96Pr0.04O4(x= 0.06). Cation distribution was inferred from the XRD patterns using MAUD program. FESEM analysis revealed the spherical-shaped particles with dimensions close to the data extracted from XRD analysis and HRTEM images confirmed it. FTIR measurements revealed the presence of two prominent stretching vibrational modes confirming the successful formation of ferrite spinel structure. Magnetic properties of the nanoparticles were measured at two different temperatures 300 K and 10 K. For the low temperature of 10 K a high sensitive measurement method as Superconducting Quantum Interference Device (SQUID) magnetometry was used and Vibrating Sample Magnetometer (VSM) recorded the magnetic data at 300 K. Comparison of the magnetic results exhibited a significant enhancement with temperature drop due to the reduction in thermal fluctuations. Paramagnetic nature of rare-earth ions may be the main reason forMSdecrement from 76 emu g-1(x= 0.0) to 60 emu g-1(x= 0.02) at 300 K. At 10 K, the estimated cation distribution played a vital role in justification of obtained magnetic results. All the obtained data showed that the synthesized magnetic nanoparticles can be implemented in permanent magnet industry and information storage fields, especially when it comes to lower temperatures.
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Affiliation(s)
| | - Elnaz Jaberolansar
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Parviz Kameli
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Ali Ghotbi Varzaneh
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
- BCMaterials & University of Basque Country, Sarriena s/n, Leioa E-48940, Spain
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Nikmanesh H, Jaberolansar E, Kameli P, Varzaneh AG, Mehrabi M, Rostami M. Structural and magnetic properties of CoFe 2O 4ferrite nanoparticles doped by gadolinium. NANOTECHNOLOGY 2021; 33:045704. [PMID: 34673546 DOI: 10.1088/1361-6528/ac31e8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
This work's main purpose is to investigate the effect of Gd3+substitution on the structural, cation distribution, morphological, and magnetic characteristics of cobalt ferrite nanostructures. The nanostructures were synthesized through the sol-gel auto combustion technique. X-ray diffraction (XRD) analysis with the Rietveld refinement through the Material Analysis Using Diffraction (MAUD) program confirmed a single-phase spinel structure for lower contents of Gd3+. However, for higher concentrations, a trace of second phase GdFeO3was evident. The crystallite size reduction from 17 to 11 nm with Gd3+doping confirmed the formation of nanocrystalline Co-Gd ferrite. Cation distribution was another parameter inferred from the experimental data of XRD analyzed by the MAUD program. Fourier-transform infrared spectra confirmed the formation of spinel structure through two prominent vibrational modes observed at the desired wavelength range. FESEM analysis confirmed the data obtained from the XRD about the structure and morphology of the nano samples. Saturation magnetization (MS) of the nano samples evaluated at 10 K showed a decreasing behavior from 94 to 86 emu g-1by Gd3+doping, while a fluctuating trend ofMSwas observed at room temperature. Coercive field (HC) evaluated at 10 K reached a maximum value of about 1145 kA m-1for the sample CoFe1.96Gd0.04O4, and then it decreased. At the same time,HCexperienced no considerable change at 300 K. The possible concepts attributed to such a trend ofHCwere also investigated. Overall, the significant impact of Gd3+doping on the cobalt ferrite nanoparticles causes Gd-Co ferrite to have a desirable capacity of permanent magnet materials and storage of information with high density. As a result, this ferrite may be a proper candidate to be utilized, especially at lower temperatures.
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Affiliation(s)
| | - Elnaz Jaberolansar
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Parviz Kameli
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Ali Ghotbi Varzaneh
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
- BCMaterials & University of Basque Country, Sarriena s/n, Leioa 48940, Spain
| | - Mohsen Mehrabi
- Department of Physics, Persian Gulf University, Bushehr 75169, Iran
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Anju, Yadav RS, Pötschke P, Pionteck J, Krause B, Kuřitka I, Vilcakova J, Skoda D, Urbánek P, Machovsky M, Masař M, Urbánek M, Jurca M, Kalina L, Havlica J. High-Performance, Lightweight, and Flexible Thermoplastic Polyurethane Nanocomposites with Zn 2+-Substituted CoFe 2O 4 Nanoparticles and Reduced Graphene Oxide as Shielding Materials against Electromagnetic Pollution. ACS OMEGA 2021; 6:28098-28118. [PMID: 34723009 PMCID: PMC8552366 DOI: 10.1021/acsomega.1c04192] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/30/2021] [Indexed: 03/08/2024]
Abstract
The development of flexible, lightweight, and thin high-performance electromagnetic interference shielding materials is urgently needed for the protection of humans, the environment, and electronic devices against electromagnetic radiation. To achieve this, the spinel ferrite nanoparticles CoFe2O4 (CZ1), Co0.67Zn0.33Fe2O4 (CZ2), and Co0.33Zn0.67Fe2O4 (CZ3) were prepared by the sonochemical synthesis method. Further, these prepared spinel ferrite nanoparticles and reduced graphene oxide (rGO) were embedded in a thermoplastic polyurethane (TPU) matrix. The maximum electromagnetic interference (EMI) total shielding effectiveness (SET) values in the frequency range 8.2-12.4 GHz of these nanocomposites with a thickness of only 0.8 mm were 48.3, 61.8, and 67.8 dB for CZ1-rGO-TPU, CZ2-rGO-TPU, and CZ3-rGO-TPU, respectively. The high-performance electromagnetic interference shielding characteristics of the CZ3-rGO-TPU nanocomposite stem from dipole and interfacial polarization, conduction loss, multiple scattering, eddy current effect, natural resonance, high attenuation constant, and impedance matching. The optimized CZ3-rGO-TPU nanocomposite can be a potential candidate as a lightweight, flexible, thin, and high-performance electromagnetic interference shielding material.
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Affiliation(s)
- Anju
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Raghvendra Singh Yadav
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Petra Pötschke
- Leibniz
Institute of Polymer Research Dresden (IPF Dresden), 01069 Dresden, Germany
| | - Jürgen Pionteck
- Leibniz
Institute of Polymer Research Dresden (IPF Dresden), 01069 Dresden, Germany
| | - Beate Krause
- Leibniz
Institute of Polymer Research Dresden (IPF Dresden), 01069 Dresden, Germany
| | - Ivo Kuřitka
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Jarmila Vilcakova
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - David Skoda
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Pavel Urbánek
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Michal Machovsky
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Milan Masař
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Michal Urbánek
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Marek Jurca
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760 01 Zlín, Czech Republic
| | - Lukas Kalina
- Materials
Research Centre, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech
Republic
| | - Jaromir Havlica
- Materials
Research Centre, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech
Republic
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Falk T, Budiyanto E, Dreyer M, Pflieger C, Waffel D, Büker J, Weidenthaler C, Ortega KF, Behrens M, Tüysüz H, Muhler M, Peng B. Identification of Active Sites in the Catalytic Oxidation of 2‐Propanol over Co
1+x
Fe
2–x
O
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Spinel Oxides at Solid/Liquid and Solid/Gas Interfaces. ChemCatChem 2021. [DOI: 10.1002/cctc.202100352] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tobias Falk
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
| | - Eko Budiyanto
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim an der Ruhr Germany
| | - Maik Dreyer
- University of Duisburg-Essen 47057 Duisburg Germany
| | - Christin Pflieger
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
| | - Daniel Waffel
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
| | - Julia Büker
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
| | | | - Klaus Friedel Ortega
- Institute of Inorganic Chemistry Christian-Albrechts-Universität zu Kiel 24118 Kiel Germany
| | - Malte Behrens
- Institute of Inorganic Chemistry Christian-Albrechts-Universität zu Kiel 24118 Kiel Germany
| | - Harun Tüysüz
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim an der Ruhr Germany
| | - Martin Muhler
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
- Max Planck Institute for Chemical Energy Conversion 45470 Mülheim an der Ruhr Germany
| | - Baoxiang Peng
- Laboratory of Industrial Chemistry Ruhr University Bochum 44780 Bochum Germany
- Max Planck Institute for Chemical Energy Conversion 45470 Mülheim an der Ruhr Germany
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Lakshmanan A, Surendran P, Sakthy Priya S, Balakrishnan K, Geetha P, Rameshkumar P, Hegde TA, Vinitha G, Kannan K. Investigations on structural, optical, dielectric, electronic polarizability, Z-scan and antibacterial properties of Ni/Zn/Fe2O4 nanoparticles fabricated by microwave-assisted combustion method. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112794] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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