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Your search keyword '"Almuqrin, Aljawhara H."' showing total 38 results
Start Over Author "Almuqrin, Aljawhara H." Publisher mdpi ag
38 results on '"Almuqrin, Aljawhara H."'

12. Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting

Author

Hadia, N. M. A., primary, Khalafalla, Mohammed A. H., additional, Abdel Salam, Fatma M., additional, Ahmed, Ashour M., additional, Shaban, Mohamed, additional, Almuqrin, Aljawhara H., additional, Hajjiah, Ali, additional, Hanafi, H. A., additional, Alruqi, Mansoor, additional, Mourad, Abdel-Hamid I., additional, and Rabia, Mohamed, additional

Published
2022
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15. A Study of Ta2O5 Nanopillars with Ni Tips Prepared by Porous Anodic Alumina Through-Mask Anodization

Author

Vorobjova, Alla I., primary, Tishkevich, Daria I., additional, Outkina, Elena A., additional, Shimanovich, Dmitry L., additional, Razanau, Ihar U., additional, Zubar, Tatiana I., additional, Bondaruk, Anastasia A., additional, Zheleznova, Ekaterina K., additional, Dong, Mengge, additional, Aloraini, Dalal A., additional, Sayyed, M. I., additional, Almuqrin, Aljawhara H., additional, Silibin, Maxim V., additional, Trukhanov, Sergey V., additional, and Trukhanov, Alex V., additional

Published
2022
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16. Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

Author

Mostafa, Maha, primary, Saleh, Oday, additional, Henaish, Ahmed Maher, additional, Abd El-Kaream, Samir Ali, additional, Ghazy, Ryad, additional, Hemeda, Osama M., additional, Dorgham, Ali M., additional, Al-Ghamdi, Hanan, additional, Almuqrin, Aljawhara H., additional, Sayyed, M. I., additional, Trukhanov, Sergei V., additional, Trukhanova, Ekaterina L., additional, Trukhanov, Alex V., additional, Zhou, Di, additional, and Darwish, Moustafa A., additional

Published
2022
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20. The Effect of WO3-Doped Soda Lime Silica SLS Waste Glass to Develop Lead-Free Glass as a Shielding Material against Radiation

Author

Khazaalah, Thair Hussein, primary, Shahrim Mustafa, Iskandar, additional, Al-Ghamdi, Hanan, additional, Abdul Rahman, Azhar, additional, Sayyed, M. I., additional, Almuqrin, Aljawhara H., additional, Mohd Zaid, Mohd Hafiz, additional, Hisam, Rosdiyana, additional, Abdul Malik, Muhammad Fadhirul Izwan, additional, Seth Ezra, Nabasu, additional, and Mohd Shariff, Hanisha, additional

Published
2022
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36. Structural and Magnetic Phase Transitions in BiFe 1 - x Mn x O 3 Solid Solution Driven by Temperature.

Author

Karpinsky DV, Silibin MV, Latushka SI, Zhaludkevich DV, Sikolenko VV, Al-Ghamdi H, Almuqrin AH, Sayyed MI, and Belik AA

Abstract

The crystal structure and magnetic state of the (1 − x)BiFeO3-(x)BiMnO3 solid solution has been analyzed by X-ray diffraction using lab-based and synchrotron radiation facilities, magnetization measurements, differential thermal analysis, and differential scanning calorimetry. Dopant concentration increases lead to the room-temperature structural transitions from the polar-active rhombohedral phase to the antipolar orthorhombic phase, and then to the monoclinic phase accompanied by the formation of two-phase regions consisting of the adjacent structural phases in the concentration ranges 0.25 < x1 < 0.30 and 0.50 ≤ x2 < 0.65, respectively. The accompanied changes in the magnetic structure refer to the magnetic transitions from the modulated antiferromagnetic structure to the non-colinear antiferromagnetic structure, and then to the orbitally ordered ferromagnetic structure. The compounds with a two-phase structural state at room temperature are characterized by irreversible temperature-driven structural transitions, which favor the stabilization of high-temperature structural phases. The magnetic structure of the compounds also exhibits an irreversible temperature-induced transition, resulting in an increase of the contribution from the magnetic phase associated with the high-temperature structural phase. The relationship between the structural parameters and the magnetic state of the compounds with a metastable structure is studied and discussed depending on the chemical composition and heating prehistory.

Published
2022
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37. A Study of Ta 2 O 5 Nanopillars with Ni Tips Prepared by Porous Anodic Alumina Through-Mask Anodization.

Author

Vorobjova AI, Tishkevich DI, Outkina EA, Shimanovich DL, Razanau IU, Zubar TI, Bondaruk AA, Zheleznova EK, Dong M, Aloraini DA, Sayyed MI, Almuqrin AH, Silibin MV, Trukhanov SV, and Trukhanov AV

Abstract

The paper discusses the formation of Ta 2 O 5 pillars with Ni tips during thin porous anodic alumina through-mask anodization on Si/SiO 2 substrates. The tantalum nanopillars were formed through porous masks in electrolytes of phosphoric and oxalic acid. The Ni tips on the Ta 2 O 5 pillars were formed via vacuum evaporation through the porous mask. The morphology, structure, and magnetic properties at 4.2 and 300 K of the Ta 2 O 5 nanopillars with Ni tips have been studied using scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometry. The main mechanism of the formation of the Ta 2 O 5 pillars during through-mask anodization was revealed. The superparamagnetic behavior of the magnetic hysteresis loop of the Ta 2 O 5 nanopillars with Ni tips was observed. Such nanostructures can be used to develop novel functional nanomaterials for magnetic, electronic, biomedical, and optical nano-scale devices.

Published
2022
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38. Photovoltaic Properties of ZnO Films Co-Doped with Mn and La to Enhance Solar Cell Efficiency.

Author

Amjad M, Khan MI, Alwadai N, Irfan M, Ikram-Ul-Haq, Albalawi H, Almuqrin AH, Almoneef MM, and Iqbal M

Abstract

In the present investigation, ZnO films co-doped with Mn and La were synthesized by the sol-gel technique. XRD analysis revealed that ZnO had a hexagonal structure. Mixed hexagonal and cubic phases appeared in ZnO containing Mn (1%) and La (1.5%). The grain size, d-spacing, unit cell, lattice parameters, atomic packing fraction, volume, strain, crystallinity, and bond length of co-doped ZnO films were determined as a function of doped ion contents. Through UV analysis, it was found that pristine ZnO had E g = 3.5 eV, and it decreased when increasing the doping concentration, reaching the minimum value for the sample with 1% Mn and 1% La. The optical parameters of the films, such as absorption, transmittance, dielectric constants, and refractive index, were also analyzed. DSSCs were fabricated using the prepared ZnO films. For pure ZnO film, the values were: efficiency = 0.69%, current density = 2.5 mAcm -2 , and open-circuit voltage = 0.56 V. When ZnO was co-doped with Mn and La, the efficiency increased significantly. DSSCs with a ZnO photoanode co-doped with 1% Mn and 1% La exhibited maximum values of J sc = 4.28 mAcm -2 , V oc = 0.6 V, and efficiency = 1.89%, which is 174% better than pristine ZnO-based DSSCs. This material is good for the electrode of perovskite solar cells.

Published
2022
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