Hojjatollah Soleimani - Profile on Academia.edu (original) (raw)
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Papers by Hojjatollah Soleimani
Corrigendum to “In-situ preparation of CoFe2O4 nanoparticles on eggshell membrane-activated carbon for microwave absorption” [Heliyon 9 (3) (March 2023) Article e13256]
Heliyon
Heliyon
This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on egg... more This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on eggshell membranes (ESM) to mitigate the increasing problem of electromagnetic interference (EMI). A simple carbonization process was adopted to synthesize CF nanoparticles on ESM. The study further examines the composites' surface morphology and chemical composition and evaluates their microwave absorption performance (MAP) at X-band frequency. Results showed that the composite of CF and ESM -CESM@CF, exhibited a strong RL peak value of -39.03 mm with an optimal thickness of 1.5 mm. The combination of CF and ESM demonstrates excellent impedance matching and EM wave attenuation. The presence of numerous interfaces, conduction loss from the morphology, interfacial polarisation, and dual influence from both CF and ESM contribute to the high MAP of the composite. CESM@CF composite is projected as an excellent biomass-based nano-composite for EM wave absorption applications.
Hydrothermal synthesis of flake-like cobalt oxide nanoparticles for electromagnetic waves absorption at X-band (8.2–12.4 GHz) frequency
Materials Science and Engineering: B
Impact of Graphene Nanofluid on Ionic Polarization in Reservoir Sandstone under Electric Double Layer
Defect and Diffusion Forum
The improved oil recovery (IOR) is a way of enhancing the reservoir properties with the use of na... more The improved oil recovery (IOR) is a way of enhancing the reservoir properties with the use of nanomaterials to detach the oil molecule from the trapped zone. The polarization effect on reservoir sandstone under an electric double layer is one of the major research interests. The nanoparticles agglomeration such as graphene nanofluid due to poor dispersion in reservoir zone can be a major challenge that can lead to low reservoir permeability are well elucidated. This study investigated the influence of graphene nanofluid on the ionic polarization under an electric double layer in reservoir sandstone. Saturated Berea sandstone was used to investigate the interaction of ionic species on reservoir sandstone with the aid of Field-emission microscopy (FESEM), Energy dispersive X-ray mapping (EDX), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectral analysis, and Core flooding experiment. This research gives information on the adsorption of ions within an electric double layer ...
Synthesis and Sintering
The rapid advancement in information technology, communication, and electronic devices elevates t... more The rapid advancement in information technology, communication, and electronic devices elevates the need to develop suitable materials for microwave absorption (MA) which should have the properties of an ideal microwave absorber. Porous activated carbon from agricultural wastes has piqued the interest of MA researchers due to their distinct properties such as good specific surface area, high dielectric loss, good electrical conductivity, and low density. Herein banana peel activated carbon was prepared by activating banana peel precursor with KOH and carbonizing at different temperatures. The difference in the porous structure with varying carbonization temperature was visible in the FESEM image, validated by BET analysis. The Banana Peel Activated carbon samples exhibited good microwave absorption performance, with BP-AC700 displaying a minimum Reflection Loss (RL) of −40.62 dB at 10.72 GHz & 3.0 mm thickness. In addition, the obtained effective absorption bandwidth of 3.5 GHz span...
Determination of Reflection and Transmission Coefficient of Ptfe at X-Band Frequency Using NRW and Fem Methods
mass-malaysia.net
Page 1. Solid State Science and Technology, Vol. 17, No 2 (2009) 32-42 ISSN 0128-7389 Correspondi... more Page 1. Solid State Science and Technology, Vol. 17, No 2 (2009) 32-42 ISSN 0128-7389 Corresponding Author: hassan.soleimani11@gmail.com 32 DETERMINATION OF REFLECTION AND TRANSMISSION COEFFICIENT ...
In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ros... more In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ross Weir (NRW) method to determine both the complex permittivity and permeability of the lanthanum iron garnet-filled PVDF-polymer nanocomposite loaded in a rectangular waveguide. The complex permittivity and permeability values were in turn used in Finite Element Method to calculate the S-parameter and were found to be in good agreement with the measured values.
Method of Moment Analysis Using Open-Ended Coaxial Sensor in Determination of Corn Reflection Coefficient
Electromagnetic properties of polytetrafluoroethylene at microwave frequencies using finite element modeling waveguide adapter
ABSTRACT Experimental and theoretical approaches were shown great potential to determine electrom... more ABSTRACT Experimental and theoretical approaches were shown great potential to determine electromagnetic properties of dielectric materials at microwave frequencies. In this study, the application of Finite Element Modeling (FEM) of waveguide adapter was utilized to investigate the distribution of electric and magnetic fields intensity of Polytetrafluoroethylene (PTFE) as dielectric sample. Essentially, the electric and magnetic fields intensity in various regions of waveguide were obtained. The computations of the reflection and transmission coefficients of dielectric sample were determined by implementation of Finite Element Methods and Nicolson-Rose-Wire (NRW) method as well. The results were compared with the experimental achievement results using the waveguide adapter in conjunction with a Vector Network Analyzer (VNA) at Microwave frequencies. The general observation indicate that, the level of transmission was greater than reflection for PTFE as dielectric material sample. Furthermore, among the two applied methods, the FEM is more accurate than the NRW method.
Determination of complex permittivity and permeability of lanthanum iron garnet filled PVDF-polymer composite using rectangular waveguide and Nicholson–Ross–Weir (NRW) method at X-band frequencies
Measurement, 2012
... 4. Conclusions. PVDF-13% LIG as a nanocomposite sample were prepared in the form of a rectang... more ... 4. Conclusions. PVDF-13% LIG as a nanocomposite sample were prepared in the form of a rectangular sheet with 1, 2 and 3 mm thicknesses. ... 377–382. [16]; Hassan Soleimani, Zulkifly Abbas, Noorhana Yahya, Hojjatollah Soleimani, Mohammad Yeganeh Ghotbi, J. Compos. ...
Journal of Nano Research, 2012
In our previous work, the lanthanum iron garnet-filled PVDF-polymer nanocomposite has been prepar... more In our previous work, the lanthanum iron garnet-filled PVDF-polymer nanocomposite has been prepared. The reflection and transmission coefficients of PVDF/LIG were measured using rectangular waveguide in conjunction with a microwave vector network analyzer (VNA) at X-band frequencies (8 GHz 12 GHz). In this study, the distribution of electric field intensity of PVDF/ LIG which was loaded in rectangular waveguide was simulated based on Finite Element Method (FEM) formulation to show the essential differences of intensity of emitted electrical field. The computations of reflection and transmission coefficients of PVDF/ LIG were determined by using implementation FEM modeling rectangular waveguide. The FEM results were compared with the experimental achievement results using the rectangular waveguide. An excellent agreement between measured and simulated results was obtained based on the values of mean relative errors.
Microwave characterization of lanthanum iron garnet-filled PVDF-polymer composite using rectangular waveguide at X-band frequency
Journal of Composite Materials, 2012
... Applied Science Department, Universiti Teknologi PETRONAS, 31750 Seri Iskandar, Malaysia Emai... more ... Applied Science Department, Universiti Teknologi PETRONAS, 31750 Seri Iskandar, Malaysia Email: hassan.soleimani11@gmail.com; hassan.soleimani@petronas.com ... This article reports the results obtained in the syn-thesis and characterization of nanostructured LIG by sol ...
In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ros... more In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ross Weir (NRW) method to determine both the complex permittivity and permeability of the lanthanum iron garnet-filled PVDF-polymer nanocomposite loaded in a rectangular waveguide. The complex permittivity and permeability values were in turn used in Finite Element Method to calculate the S-parameter and were found to be in good agreement with the measured values.
Corrigendum to “In-situ preparation of CoFe2O4 nanoparticles on eggshell membrane-activated carbon for microwave absorption” [Heliyon 9 (3) (March 2023) Article e13256]
Heliyon
Heliyon
This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on egg... more This study explores the potential of using cobalt ferrite (CF) nanoparticles grown in situ on eggshell membranes (ESM) to mitigate the increasing problem of electromagnetic interference (EMI). A simple carbonization process was adopted to synthesize CF nanoparticles on ESM. The study further examines the composites' surface morphology and chemical composition and evaluates their microwave absorption performance (MAP) at X-band frequency. Results showed that the composite of CF and ESM -CESM@CF, exhibited a strong RL peak value of -39.03 mm with an optimal thickness of 1.5 mm. The combination of CF and ESM demonstrates excellent impedance matching and EM wave attenuation. The presence of numerous interfaces, conduction loss from the morphology, interfacial polarisation, and dual influence from both CF and ESM contribute to the high MAP of the composite. CESM@CF composite is projected as an excellent biomass-based nano-composite for EM wave absorption applications.
Hydrothermal synthesis of flake-like cobalt oxide nanoparticles for electromagnetic waves absorption at X-band (8.2–12.4 GHz) frequency
Materials Science and Engineering: B
Impact of Graphene Nanofluid on Ionic Polarization in Reservoir Sandstone under Electric Double Layer
Defect and Diffusion Forum
The improved oil recovery (IOR) is a way of enhancing the reservoir properties with the use of na... more The improved oil recovery (IOR) is a way of enhancing the reservoir properties with the use of nanomaterials to detach the oil molecule from the trapped zone. The polarization effect on reservoir sandstone under an electric double layer is one of the major research interests. The nanoparticles agglomeration such as graphene nanofluid due to poor dispersion in reservoir zone can be a major challenge that can lead to low reservoir permeability are well elucidated. This study investigated the influence of graphene nanofluid on the ionic polarization under an electric double layer in reservoir sandstone. Saturated Berea sandstone was used to investigate the interaction of ionic species on reservoir sandstone with the aid of Field-emission microscopy (FESEM), Energy dispersive X-ray mapping (EDX), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectral analysis, and Core flooding experiment. This research gives information on the adsorption of ions within an electric double layer ...
Synthesis and Sintering
The rapid advancement in information technology, communication, and electronic devices elevates t... more The rapid advancement in information technology, communication, and electronic devices elevates the need to develop suitable materials for microwave absorption (MA) which should have the properties of an ideal microwave absorber. Porous activated carbon from agricultural wastes has piqued the interest of MA researchers due to their distinct properties such as good specific surface area, high dielectric loss, good electrical conductivity, and low density. Herein banana peel activated carbon was prepared by activating banana peel precursor with KOH and carbonizing at different temperatures. The difference in the porous structure with varying carbonization temperature was visible in the FESEM image, validated by BET analysis. The Banana Peel Activated carbon samples exhibited good microwave absorption performance, with BP-AC700 displaying a minimum Reflection Loss (RL) of −40.62 dB at 10.72 GHz & 3.0 mm thickness. In addition, the obtained effective absorption bandwidth of 3.5 GHz span...
Determination of Reflection and Transmission Coefficient of Ptfe at X-Band Frequency Using NRW and Fem Methods
mass-malaysia.net
Page 1. Solid State Science and Technology, Vol. 17, No 2 (2009) 32-42 ISSN 0128-7389 Correspondi... more Page 1. Solid State Science and Technology, Vol. 17, No 2 (2009) 32-42 ISSN 0128-7389 Corresponding Author: hassan.soleimani11@gmail.com 32 DETERMINATION OF REFLECTION AND TRANSMISSION COEFFICIENT ...
In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ros... more In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ross Weir (NRW) method to determine both the complex permittivity and permeability of the lanthanum iron garnet-filled PVDF-polymer nanocomposite loaded in a rectangular waveguide. The complex permittivity and permeability values were in turn used in Finite Element Method to calculate the S-parameter and were found to be in good agreement with the measured values.
Method of Moment Analysis Using Open-Ended Coaxial Sensor in Determination of Corn Reflection Coefficient
Electromagnetic properties of polytetrafluoroethylene at microwave frequencies using finite element modeling waveguide adapter
ABSTRACT Experimental and theoretical approaches were shown great potential to determine electrom... more ABSTRACT Experimental and theoretical approaches were shown great potential to determine electromagnetic properties of dielectric materials at microwave frequencies. In this study, the application of Finite Element Modeling (FEM) of waveguide adapter was utilized to investigate the distribution of electric and magnetic fields intensity of Polytetrafluoroethylene (PTFE) as dielectric sample. Essentially, the electric and magnetic fields intensity in various regions of waveguide were obtained. The computations of the reflection and transmission coefficients of dielectric sample were determined by implementation of Finite Element Methods and Nicolson-Rose-Wire (NRW) method as well. The results were compared with the experimental achievement results using the waveguide adapter in conjunction with a Vector Network Analyzer (VNA) at Microwave frequencies. The general observation indicate that, the level of transmission was greater than reflection for PTFE as dielectric material sample. Furthermore, among the two applied methods, the FEM is more accurate than the NRW method.
Determination of complex permittivity and permeability of lanthanum iron garnet filled PVDF-polymer composite using rectangular waveguide and Nicholson–Ross–Weir (NRW) method at X-band frequencies
Measurement, 2012
... 4. Conclusions. PVDF-13% LIG as a nanocomposite sample were prepared in the form of a rectang... more ... 4. Conclusions. PVDF-13% LIG as a nanocomposite sample were prepared in the form of a rectangular sheet with 1, 2 and 3 mm thicknesses. ... 377–382. [16]; Hassan Soleimani, Zulkifly Abbas, Noorhana Yahya, Hojjatollah Soleimani, Mohammad Yeganeh Ghotbi, J. Compos. ...
Journal of Nano Research, 2012
In our previous work, the lanthanum iron garnet-filled PVDF-polymer nanocomposite has been prepar... more In our previous work, the lanthanum iron garnet-filled PVDF-polymer nanocomposite has been prepared. The reflection and transmission coefficients of PVDF/LIG were measured using rectangular waveguide in conjunction with a microwave vector network analyzer (VNA) at X-band frequencies (8 GHz 12 GHz). In this study, the distribution of electric field intensity of PVDF/ LIG which was loaded in rectangular waveguide was simulated based on Finite Element Method (FEM) formulation to show the essential differences of intensity of emitted electrical field. The computations of reflection and transmission coefficients of PVDF/ LIG were determined by using implementation FEM modeling rectangular waveguide. The FEM results were compared with the experimental achievement results using the rectangular waveguide. An excellent agreement between measured and simulated results was obtained based on the values of mean relative errors.
Microwave characterization of lanthanum iron garnet-filled PVDF-polymer composite using rectangular waveguide at X-band frequency
Journal of Composite Materials, 2012
... Applied Science Department, Universiti Teknologi PETRONAS, 31750 Seri Iskandar, Malaysia Emai... more ... Applied Science Department, Universiti Teknologi PETRONAS, 31750 Seri Iskandar, Malaysia Email: hassan.soleimani11@gmail.com; hassan.soleimani@petronas.com ... This article reports the results obtained in the syn-thesis and characterization of nanostructured LIG by sol ...
In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ros... more In this study, an optimization approach is shown to improve the accuracy of the Nicholson and Ross Weir (NRW) method to determine both the complex permittivity and permeability of the lanthanum iron garnet-filled PVDF-polymer nanocomposite loaded in a rectangular waveguide. The complex permittivity and permeability values were in turn used in Finite Element Method to calculate the S-parameter and were found to be in good agreement with the measured values.