Article
Materials Science, Ceramics
Xiaodong Jing, Mohan Guo, Ziyu Li, Ciyu Qin, Zitao Chen, Zuoguang Li, Huayang Gong
Summary: Rare earth doped cobalt ferrite nanoparticles were synthesized and the effect mechanism of rare earth ions replacing cobalt and iron ions on cobalt ferrite was studied. The different roles of rare earth dopants in changing cation distribution, structure, and magnetism properties were investigated, showing that rare earth doping can not only induce crystal structure changes but also improve particle distribution uniformity.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zhanmeng Liu, Gang Chen, Xian Li, Xiuguo Lu
Summary: This study successfully prepared two new adsorbents for the adsorption of rare earth elements, which showed good adsorption performance and recycling properties. With advantages of low cost, high adsorption efficiency, magnetic separation, and reusability, MnFe2O4-Al2O3 and MnFe2O4@SiO2-CS hold great application prospects in adsorbing rare earth elements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Chemistry, Applied
Changye Mang, Zhijun Ma, Jun Luo, Mingjun Rao, Xin Zhang, Zhiwei Peng
Summary: Doping rare earth elements into Co-Zn ferrite nanoparticles can enhance their permeability and improve their electromagnetic wave absorption performance. The study shows that with increasing doping amounts, the particle morphology and absorption performance of the nanoparticles change.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Physical
Xueyun Zhou, Jun Wang, Dongsheng Yao
Summary: In this study, RE0.01Ni0.3Zn0.4Mn0.3Fe2O4 (RE=Fe, La, Nd, Sm, Gd, Dy, Yb) ferrites with precisely controlled composition were prepared. It was found that the lattice constant decreases with the increase of atomic number of rare earth. The infrared spectra showed changes in the tetrahedral and octahedral bonds. The introduction of rare earth slightly reduced the saturation magnetization and initial permeability, but had the same effect on Ms. These ferrites exhibited spin glass state or superparamagnetism at high temperature, and Sm, Gd, and Dy doped ferrites displayed unique dielectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Y. Belaiche, K. Minaoui, M. Ouadou, Y. Mouhib, M. Elansary
Summary: In this study, rare-earth multi-doped Zn-Ni-Co spinel ferrite nanoparticles were synthesized and their thermal behavior, crystal structure, morphology, and magnetic properties were investigated. The results showed that these nanoparticles exhibited excellent magnetic properties, making them potential candidates for applications in high-frequency electromagnetic interference suppression, electronics, communication, and gigahertz antenna.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Engineering, Chemical
Lingxian Han, Yu Peng, Jiutong Ma, Zhan Shi, Qiong Jia
Summary: This study for the first time employed copolymer precursors to construct HCPs and successfully applied them to the adsorption of REEs, laying a foundation for further design and application of various HCPs in the field of adsorption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Astita Dubey, Soma Salamon, Supun B. Attanayake, Syaidah Ibrahim, Joachim Landers, Marianela Escobar Castillo, Heiko Wende, Hari Srikanth, Vladimir V. Shvartsman, Doru C. Lupascu
Summary: Ionic engineering is used to substitute rare-earth elements in BiFe0.95Mn0.05O3 NPs, resulting in morphological changes and improved piezoresponse and magnetic hyperthermia potential. The increment in magnetization has an impact on the hyperthermia results.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Multidisciplinary Sciences
Jian Wang, Yusuke Hirayama, Zheng Liu, Kazuyuki Suzuki, Wataru Yamaguchi, Kwangjae Park, Kenta Takagi, Hiroaki Kura, Eiji Watanabe, Kimihiro Ozaki
Summary: This study provides new insights into the formation mechanism of the tetragonal FeNiN precursor phase during the nitridation of FeNi nanopowders through detailed microstructure analysis. The work is expected to promote the synthetic optimization of fully ordered FeNi alloys for various magnetic applications.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
I. S. B. Ferraz, T. J. Castro, J. Mantilla, J. A. H. Coaquira, V. K. Garg, A. C. Oliveira, A. Franco Jr, P. C. Morais, S. W. da Silva
Summary: Aluminum-substituted cobalt ferrite nanoparticles synthesized by combustion reaction method exhibit excellent structural and property characteristics, making them promising candidates for applications in stress sensors, actuators, and magnetostrictive filters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Lorena Molina-Calderon, Carlos Basualto-Flores, Veronica Paredes-Garcia, Diego Venegas-Yazigi
Summary: Rare earth elements (REEs) are important raw materials for high-tech devices. Magnetic Nanohydrometallurgy (MNHM) is a promising technology that combines nanotechnology with the hydrometallurgy process to extract and separate metal ions as REEs from diluted leaching solutions. MNAs with superparamagnetism are used as adsorbents, allowing for easy separation from aqueous media by an external magnetic field.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Patricia Gomes, Barbara Costa, Joao P. F. Carvalho, Paula I. P. Soares, Tania Vieira, Celia Henriques, Manuel Almeida Valente, Silvia Soreto Teixeira
Summary: Cancer is a leading cause of death worldwide and traditional treatments have limitations and severe side effects. Magnetic hyperthermia is an alternative method that can be used alone or in conjunction with chemotherapy or radiotherapy. The use of cobalt ferrite particles synthesized through an innovative biogenic sol-gel method was evaluated for its suitability in magnetic hyperthermia applications through thermal, structural, magnetic, and cytotoxic analyses.
Article
Chemistry, Multidisciplinary
Diana Zahn, Joachim Landers, Marco Diegel, Soma Salamon, Andreas Stihl, Felix H. Schacher, Heiko Wende, Jan Dellith, Silvio Dutz
Summary: This study reports the synthesis and characterization of high coercivity cobalt ferrite nanoparticles using a wet co-precipitation method. The results show that the properties of the nanoparticles, including crystallinity, coercivity, and magnetization, can be tuned by varying the synthesis conditions and atmosphere. The influence of cobalt fraction on the magnetic and structural properties of the particles is also investigated, revealing a direct correlation between high-field magnetization, an antiferromagnetic phase, and the estimated transition temperature.
Article
Engineering, Electrical & Electronic
Liqiong Shao, Aimin Sun, Yanchun Zhang, Lichao Yu, Nanzhaxi Suo, Zhuo Zuo
Summary: The Ni-Mg-Co magnetic ferrite nanoparticles doped with Al3+, La3+, Ce3+, Pr3+ and Sm3+ exhibit a single-phase spinel structure, with decreases in average crystallite size after rare-earth ion doping and an increase in size after Al3+ doping. The magnetic properties, including remanent magnetization, square degree, coercivity rectangle degree and anisotropy constant, all show variations after doping with rare-earth ions and Al3+.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Physics, Applied
Abdullah Almohammedi, Yasser A. M. Ismail, Mohd T. Khan, Mohamed Benghanem, Saleh N. Alamri, Tetsuo Soga, Mohamad Rusop
Summary: In this study, a thin film of Sn metal was used as the back electrode for organic solar cells. The effects of post-thermal annealing on the performance parameters of the solar cell and the morphological and electrical properties of the Sn thin films were investigated. The results showed that appropriate post-annealing could improve the performance parameters of the solar cells.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ahmed Abdel-Salam, Sayed Y. Attia, Fouad El-Hosiny, M. A. Sadek, Saad G. Mohamed, M. M. Rashad
Summary: Sb(OH)3 is successfully synthesized via a simple hydrothermal method as a high-performance catalyst for organic reactions, addressing the issues of high cost and poor environmental friendliness in traditional synthesis methods.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ahmed Mourtada Elseman, M. M. Rashad
Summary: Apart from perovskite crystallization, the hole transport layer (HTL) plays a significant role in regulating charge transportation for inverted perovskite solar cells (PSCs). In this study, effective p-i-n PSCs based on a solid solution-coating of Kesterite Cu2ZnSnS4 (CZTS) as HTL were demonstrated in both air and nitrogen environments. The CZTS-HTL based on N-2 annealing achieved higher hole extraction efficiency and a substantial improvement in power conversion efficiency (PCE) compared to air-annealed devices.
Article
Chemistry, Multidisciplinary
Ahmed M. Elseman, Ahmed S. Radwan, Mohamed M. Makhlouf, Mohamed M. Rashad
Summary: The synthesis of three new 3-arylazo-thieno[3,2-b]pyranone dyes, their physical, chemical and optoelectronic properties, including optical and thermal characteristics, have been studied. The results suggest that these dyes could be strong candidates for p-type semiconductors and have potential applications in solar cells and light-harvesting.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
H. G. Abd-Elbaky, M. Rasly, Reem G. Deghadi, Gehad G. Mohamed, M. M. Rashad
Summary: In recent years, the eco-friendly strong-base free synthesis has been applied to the synthesis of spinel cobalt ferrites, leading to successful preparation of the ferrites. By adjusting the composition and structure, the magnetic and optical properties of the cobalt ferrites were controlled, providing a feasible approach for magneto-optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Ahmed I. Abdel-Salam, Sayed Y. Attia, Saad G. Mohamed, Fouad I. El-Hosiny, M. A. Sadek, M. M. Rashad
Summary: The purpose of this study is to improve the electrochemical performance of supercapacitors by designing and exploring novel active electrode materials. A hierarchical structure of nickel-cobalt-sulfide nanostructures (NiCo2S4) decorated on electrospun N-doped carbon nanofiber (CNF), called NiCo2S4@CNF, was fabricated using a one-step hydrothermal approach. The NiCo2S4@CNF hierarchical structure exhibited a large surface area and high porosity, serving as ion diffusion channels, resulting in high specific capacitance and specific capacity values. The NiCo2S4@CNF//CNF hybrid supercapacitor demonstrated superior energy density and stability, making it a promising electrode material for supercapacitor applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
Ahmed Mohamed Ibrahim, Fatehy M. Abdel-Haleem, Azza Salah, Mahmoud S. Rizk, Samir A. Abdel-Latif, Ali Omar Turky, Mohamed M. Rashad, Ahmed Barhoum
Summary: In this study, a potentiometric sensor based on carbon paste electrodes was developed for the determination of salicylates in pharmaceutical formulations and biofluids. The sensor showed high sensitivity, fast response time, low detection limit, good selectivity, and stability.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Amal G. Mahdy, Abeer A. Emam, E. A. Mussa, A. Y. Abdel-All, M. M. Rashad, Aya M. Abuelftooh, Saad G. Mohamed
Summary: The nanoscale Li2Mn0.8Ni0.2SiO4/MnO2 composite was successfully synthesized via a two-step method, involving the preparation of MnO2 nanoparticles and the synthesis of Li2Mn0.8Ni0.2SiO4 using an EDTA-assisted sol-gel method. The nanocomposite exhibited an orthorhombic crystal structure with a Pmn2(1) space group and mesoporous properties. The electrode showed excellent electrochemical performance, making it a promising candidate for high-efficiency energy storage electrode materials.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Alaa E. Abd El-Samad, Nasr Gad, Mostafa El-Aasser, Mohamed M. Rashad, Ahmed Mourtada Elseman
Summary: This study utilized the ball milling method to fabricate less toxic and high-quality lead halide perovskite materials. Zinc doping decreased the bandgap energy and improved the material properties. Meanwhile, simulation research found that cobalt-doped materials had higher photovoltaic conversion efficiency. The work highlighted the potential of new perovskite semiconductors in creating novel nanostructured superior materials.
Article
Engineering, Chemical
Hesham A. Hassan, Ali Omar Turky, Ali M. Hassan, Hosni A. G. Ahmed, Mohmed. M. Rashad
Summary: Titanium-substituted lanthanum strontium manganite (LSMO) nanoparticles with titanium ratios of 0.1, 0.2, 0.3, 0.4, and 0.5 were prepared using an organic acid precursor pathway. The insertion of titanium led to an increase in crystallite size, change in optical properties, and an increase in band gap energy. The refractive index, however, slightly decreased with increased titanium concentration.
PARTICULATE SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mohamed A. Nawwar, Magdy S. Abo Ghazala, Lobna M. Sharaf El-Deen, Badawi Anis, Abdelhamid El-Shaer, Ahmed Mourtada Elseman, Mohamed M. Rashad, Abd El-hady B. Kashyout
Summary: GeSn compounds have been widely studied in photodetectors due to their detection limit in the NIR and mid-IR region. In this article, p-i-n structures based on GeSn junctions were fabricated and the impact of As and Sn doping on the strain characteristics of GeSn was studied. The direct transitions and tuning of their band energies were investigated, and the barrier height and spectral responsivity were controlled with the incorporation of As. The heterojunctions prepared showed spectral responses in the near UV and NIR regions, making them suitable for UV and NIR photodetection applications.
Article
Chemistry, Multidisciplinary
E. M. Elsayed, Ashraf K. Eessaa, M. M. Rashad, S. M. Abdelbasir, A. M. El-Shamy
Summary: Nanocrystalline zinc oxide (ZnO) films were electrodeposited onto indium doped tin oxide (ITO) substrates using aqueous solutions of zinc nitrate at temperatures ranging from 25 0C to 75 0C. Linear sweep voltammetry and chronopotentiometry techniques were used to investigate the deposition process and the effects of different factors. Temperature and current were found to have a significant influence on the growth of ZnO films. The nucleation mechanism was found to be instantaneous at potentials between -800 and -1200 mV, and non-instantaneous and gradual at voltages higher than -1400 mV. X-ray analysis confirmed the presence of Zincite phase with a crystallite size of 61 nm, and the films exhibited a smooth and compact surface.
EGYPTIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hesham A. Hassan, Ali Omar Turky, Ali M. Hassan, Hosni A. Gomaa, Mohmed M. Rashad
Summary: In this study, titanium substituted lanthanum strontium manganite (LSMTO) nanopowders were prepared and their structural, microstructure, magnetic properties, anti-microbial activity, and anti-cancer activity were investigated. The results showed that substitution of Ti4+ ion increased the crystallite size and affected the magnetization-temperature relationship. Furthermore, the LSMTO powders exhibited cytotoxic effects on HepG-2 cells.
EGYPTIAN JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Motaz G. Fayed, Saad G. Mohamed, Yosry F. Barakat, E. E. El-Shereafy, M. M. Rashad
Summary: Spinel Li2Co1-xCuxTi3O8 nanopowders were synthesized via a sol-gel auto-combustion scheme and their physical and chemical properties were characterized through various testing methods. The Li2Co0.75Cu0.25Ti3O8 electrode exhibited good reversible charge-discharge capacity and cycling stability in the lithium-ion battery.
BULLETIN OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Moustafa A. Shawkey, Ahmed M. Hassan, Mohamed M. Rashad
Summary: The paper compares the effects of different mixtures with ground granulated blast-furnace slag (GGBS) replacement and different sizes of concrete blocks on heat generation and the risk of cracking in mass concrete.
EGYPTIAN JOURNAL OF CHEMISTRY
(2022)
