Article
Materials Science, Multidisciplinary
C. N. Anumol, M. Chithra, V. Argish, B. N. Sahu, Subasa C. Sahoo
Summary: This study investigated the magnetic properties of nanocomposites of Co-ferrite and Zn-ferrite with different weight percentages and annealing temperatures. The results showed that magnetization and coercivity values were correlated with annealing temperature and the weight percentage of the constituent ferrites in the samples.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Crystallography
Abdulrahman Mallah, Fatimah Al-Thuwayb, Mohamed Khitouni, Abdulrahman Alsawi, Joan-Josep Sunol, Jean-Marc Greneche, Maha M. Almoneef
Summary: The sol-gel process was used to synthesize ferrite Ni0.3Zn0.7Cr2-xFexO4 nanoparticles, which were then calcined at various temperatures. The structure and magnetic properties of the nanoparticles were characterized by XRD, SEM, VSM, and Mossbauer spectrometry. The results showed that the nanoparticles had a single-phase spinel structure and low magnetization due to the absence of ferromagnetic Ni2+ ions and weak interactions between Fe3+ ions.
Article
Chemistry, Multidisciplinary
Yuruo Zheng, Ghulam Hussain, Shuyi Li, Shanta Batool, Xiawa Wang
Summary: In this study, nanoparticles of Co1-xRexFe2O4 and CoFe2-xRexO4 (0 <= x <= 0.05) were synthesized by the sol-gel method. The substitution of Re led to slightly increased lattice parameters and shift in Raman spectra peak positions. The surface Re exchange changed the coordination environment of metals and induced Fe-site structure distortion. The magnetic measurements showed that all samples exhibited ferromagnetic behavior across the entire temperature range.
Article
Engineering, Electrical & Electronic
Yanchun Zhang, Aimin Sun, Zhaxi Suonan
Summary: Ni-Mg-Zn ferrite was prepared via sol-gel method with different complexing agents. XRD and FTIR analysis showed spinel phase structure, while SEM and TEM revealed spherical cube-shaped particles. EDS analyzed elemental composition, and VSM characterized magnetic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Sanjeet Kumar Paswan, Pawan Kumar, Suman Kumari, Subhadeep Datta, Manoranjan Kar, J. P. Borah, Lawrence Kumar
Summary: This study investigates the structural, optical, temperature-dependent magnetic, and electrical properties of nanocrystalline NiFe1.97RE0.03O4 (RE = La3+ and Sm3+) compound. The results show that rare earth ion substitution leads to a decrease in lattice constant and particle size. The optical and magnetic properties of rare earth substituted samples are different from pure nickel ferrite, while their electrical properties exhibit similar behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Ceramics
S. Divya, P. Sivaprakash, S. Raja, S. Esakki Muthu, Ikhyun Kim, N. Renuka, S. Arumugam, Tae Hwan Oh
Summary: Ferrite nanostructure materials, with their unique magnetic, dielectric, electrical, and catalytic properties, are of vital importance in various applications such as high frequency, memory, imaging, sensor, energy, and biomedical fields. This study investigated the structural, morphological, vibrational, optical, electrical, and magnetic properties of Co1-xZnxFe2O4 nanoparticles prepared by sol-gel auto-combustion method. The results showed that Zn doping significantly affected the crystallite size, lattice constant, unit cell, X-ray density, dislocation density, hopping length, Fe-O stretching vibration, particle size, charge carrier type, dielectric constant, and saturation magnetization of the material.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Alina V. Semchenko, Vitaly V. Sidsky, Igor Bdikin, Vladimir E. Gaishun, Svitlana Kopyl, Dmitry L. Kovalenko, Oleg Pakhomov, Sergei A. Khakhomov, Andrei L. Kholkin
Summary: La doping and higher crystallization temperature result in increased grain size and preferred orientation, while decreasing effective piezoelectric coefficient and increasing non-polar phase surface area. La doping enhances grain size and self-polarization, important for future piezoelectric applications.
Article
Engineering, Environmental
Ayesha Idrees, Ali Shan, Muhammad Danish, Waqas Qamar Zaman, Ali Mohsin, Zain Abbas, Jingyao Huang, Tanvir Shahzad, Yong Sun, Zhiqiang Xu, Shuguang Lyu
Summary: This study evaluated the characteristics and catalytic performance of CuFe2O4 synthesized by three different methods, with the solvothermal method showing superior specific surface area and micro-pore volume. The results highlighted the importance of preparation means in determining the catalytic potential of ferrite.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Jingwu Zheng, Danni Zheng, Liang Qiao, Yao Ying, Yiping Tang, Wei Cai, Wangchang Li, Jing Yu, Juan Li, Shenglei Che
Summary: Utilizing a Co-Ba composite ferrite insulation layer to clad reduced iron powder improved the performance of soft magnetic composites, achieving a balance between core loss and permeability with enhanced properties at an optimized annealing temperature. Analysis through magnetic testing and simulation confirmed the effectiveness of the coating in enhancing the magnetic properties of Fe-based SMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jefferson A. Lopes Matias, Evanimek B. Sabino da Silva, Rafael A. Raimundo, Djalma Ribeiro da Silva, Joao B. L. Oliveira, Marco A. Morales
Summary: Nanocrystalline Co sillenite-Co3O4 composites were prepared by combustion and sol-gel methods, and further characterized by various techniques. The sillenite phase exhibited nanostructured with similar content in products from both synthesis methods, showing both ferromagnetic and antiferromagnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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
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
Materials Science, Ceramics
Seyedeh Mansoureh Hashemi, Zahra Ataollahi, Saeed Hasani, Amir Seifoddini
Summary: The cobalt ferrite magnetic nanoparticles were synthesized using the sol-gel auto-combustion method with different amounts of egg white protein. The addition of albumin reduced the average crystallite size and increased the coercivity and saturation magnetization of the nanoparticles. The presence of albumin caused cation redistribution, affecting magnetic anisotropy and inversion degree.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Yuheng Guo, Haiyan Li, Shouqiang Li, Leilei Chen, Zhenhai Li
Summary: This study prepared Zn-doped YIG nanoparticles by the sol-gel method and explored the effect and mechanism of Zn ion doping on the crystal structure, peak intensity, and magnetic properties of YIG. The results provide important theoretical support for the application of YIG devices in microwave and high-temperature fields.
Article
Materials Science, Ceramics
Hamnesh Mahajan, Shammi Kumar, Anjori Sharma, Ibrahim Mohammed, Manisha Thakur, Amarjeet Kaur, A. K. Srivastava
Summary: Sol-gel methodology was used to produce Mn0.3Co0.2Zn0.5Fe2O4 ferrite nanoparticles at different sintering temperatures. XRD, FTIR, FESEM, EDX, VSM, and electrochemical studies were conducted to analyze the properties of the synthesized specimens. The results showed the formation of spinel structure, agglomerated grains, stoichiometry confirmation, enhanced saturation magnetization with higher sintering temperature, and higher specific capacitance for Mn0.3Co0.2Zn0.5Fe2O4 (1150 degrees C).
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
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
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)