Article
Materials Science, Ceramics
Sheetal Sharma, Manoj Kumar
Summary: BiFe1-xCoxO3 samples (with x = 0.0, 0.01, 0.02, and 0.05; named as BFO, BFCO-1, BFCO-2, and BFCO-5) were prepared using the sol-gel process. The impact of Co3+ substitution on the structural, vibrational, and magnetic characteristics of BiFeO3 was studied. The structural analysis confirmed the polycrystalline nature with a distorted rhombohedral structure. The substitution of Co3+ increased the concentration of Fe2+ state and enhanced the magnetic behavior.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yogesh Kumar, S. Tripathi, Mangla Nand, R. Jangir, V. Srihari, A. Das, R. Singh, U. Deshpande, S. N. Jha, A. Arya
Summary: This study investigated the effect of Nd doping on the structural, optical, and electronic properties of lanthanum monazite structure. Pure and Nd-doped LaPO4 powders were prepared and analyzed for their composition, oxidation states, crystal structure, and bandgaps. The results confirmed the successful substitution of Nd in the LaPO4 matrix and provided insights into the local structure using extended X-ray absorption fine structure analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
S. K. Syamlal, Neha Gupta, Hari Prasanth Perumal, Dileep Kumar, Mukul Gupta, Pooja Gupta, Jaivardhan Sinha
Summary: This study investigates the effect of annealing on the structural and magnetic properties of Ta/CoFeB/TaOx thin film heterostructure. They found that annealing improves the interface quality, enhances the saturation magnetization and uniaxial magnetic anisotropy, and the thickness of the Ta spacer layer and annealing temperature play a crucial role in controlling the interface quality.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Muhammad Hadi, Emad H. Raslan, Rajesh Kumar, Muhammad Farzik Ijaz, Abdulaziz K. Assaifan
Summary: The synthesis of vanadium-doped BCZT ceramic oxides was reported in this paper, confirming the existence of a solubility limit of V in BCZT ceramics. Analysis revealed the influence of crystal structure and formation of oxygen vacancies on the luminescence and electrical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Ziyi Chen, Andrew G. Walsh, Xiao Wei, Manzhou Zhu, Peng Zhang
Summary: This study investigates the electronic properties of Ag-25(SR)(18) and Au-25(SR)(18) and develops a unique method to analyze the charge transfer behavior of nanoclusters. Experimental X-ray spectroscopy is used to demonstrate the bonding properties of silver nanoclusters, with the staple motif shown to have a significant impact on their electronic properties. The effective X-ray analysis techniques developed here provide new opportunities for the site-specific study of other nanoclusters.
Article
Chemistry, Physical
Khalid Mujasam Batoo, Ritesh Verma, Ankush Chauhan, Rajesh Kumar, Muhammad Hadi, Omar M. Aldossary, Y. Al-Douri
Summary: This study reported the synthesis of Gd and Nb co-doped BT ceramic oxides and investigated their structural and electrical properties. Various analysis techniques were used to characterize the samples, revealing the influence of Gd and Nb doping on the electrical properties of the ceramic materials, which were found to improve with increasing dopant concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Tuan V. Vu, I. V. Luzhnyi, G. L. Myronchuk, V. L. Bekenev, M. S. Bohdanyuk, A. A. Lavrentyev, B. V. Gabrelian, O. V. Parasyuk, O. Y. Khyzhun
Summary: The study reveals that Tl4PbI6 crystal has high quality, low hygroscopicity, high stability, and strong covalency. Using DFT calculations, it is confirmed that Tl4PbI6 is a direct band gap semiconductor with potential application in optoelectronic devices.
Article
Chemistry, Physical
Diana M. Arciniegas Jaimes, Valeria C. Fuertes, M. Cecilia Blanco, German Tirao, Silvina Limandri, Vivian M. Nassif, Gabriel J. Cuello, Alejandro Rodriguez, Edilso Reguera, Raul E. Carbonio
Summary: This study reports the synthesis, structural characterization, and magnetic properties of La3Mn2NbO9 double perovskite. The crystal structure shows a high degree of cation order and magnetization measurements reveal the presence of ferromagnetic and antiferromagnetic interactions at different temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ebrahim Abualgassem, Monzer Maarouf, Abdulhakim Bake, David Cortie, Khan Alam, Muhammad Baseer Haider
Summary: This study investigates the properties of cobalt-doped titanium nitride thin films grown by reactive co-sputtering. The films readily oxidize after exposure to the atmosphere and form cobalt-doped titanium oxynitride. The variable cobalt concentration in the films affects their optical, chemical, and magnetic properties. At higher cobalt concentrations, the films have a narrower bandgap and exhibit a temperature-dependent magnetic response with a mix of paramagnetism and superparamagnetism.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
S. K. Shaw, A. Gangwar, A. Sharma, S. K. Alla, S. Kavita, M. Vasundhara, Sher Singh Meena, P. Maiti, N. K. Prasad
Summary: A single phase equi-atomic high-entropy oxide with spinel structure was successfully synthesized using microwave assisted co-precipitation technique, exhibiting high crystallinity and stability at high temperatures. The uniform elemental distribution was confirmed through STEM-EDS elemental mapping. The ferrimagnetic behavior of the obtained HEO was confirmed through magnetic characterizations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
G. A. Alna'washi, A. M. Alsmadi, I. Bsoul, B. Salameh, Gassem M. Alzoubi, M. Shatnawi, S. M. Hamasha, S. H. Mahmood
Summary: The substitution of Fe3+ ions with a combination of Ni2+ and Ti4+ in SrM hexaferrites synthesized via mechanical ball-milling technique was investigated. XRD and XPS confirmed the phase purity and elemental distribution, respectively. The study revealed electron transfers between Fe3+ and Ni2+ ions with increasing Ni concentration, leading to changes in magnetic behavior and anisotropy constants.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Asmaa Ratep, Ismail Kashif
Summary: The study examines the impact of substituting CuO with Fe2O3 on the iron oxidation state and electrical conductivity of lithium borosilicate glass samples. Results indicate that the homogeneity of the glass increases with higher iron concentrations, and the ratios of Fe+2/Fe+3 are influenced by CuO. Moreover, iron ions in the glass samples mainly exist in the form of Fe2O3 in the ferrous state, with more than 7.5% concentration. Additionally, electrical conductivity is found to depend on the oxidation state of copper and the mixed transition metal effect.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Zexing Wang, Yunfeng Guo, Jiamao Li
Summary: In this paper, a series of Li2Zn[Ti1-x(Co1/3Nb2/3)x]3O8 ceramics were prepared via the conventional solid-state method. The influences of (Co1/3Nb2/3)4+ complex ions on the phase composition, spectral characteristics, microstructure, and microwave dielectric properties of Li2Zn[Ti1-x(Co1/3Nb2/3)x]3O8 ceramics were systematically studied. The study found that the presence of (Co1/3Nb2/3)4+ content affected the structure, performance, and microwave dielectric properties of Li2Zn[Ti1-x(Co1/3Nb2/3)x]3O8 ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jiayao Lu, Ying Li, Wenlong Huang
Summary: In this study, BaCe1-xLaxO3-delta oxides were synthesized and characterized for their crystal structure, conductivity, and chemical properties. The results showed variations in structure and properties among samples with different La content, with BaCe0.95La0.05O3-delta exhibiting the highest conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Samiya Islam, Md. Lutfor Rahman, Md. Rassel Moni, Bristy Biswas, Md. Farid Ahmed, Nahid Sharmin
Summary: Nanocrystalline zinc ferrite (NZF) was successfully synthesized using sol-gel method with tartaric acid and PVA solution as chelating agent and binder respectively. Characterization and properties of NZF were investigated using various techniques. The crystallite and particle size of ZnFe2O4 samples increased with annealing temperature, while lattice parameters and strain decreased. The synthesized NZF showed net magnetic moment and narrow energy band gaps. The dielectric properties and impedance of NZF were measured. The synthesized particles have potential applications as gas sensors, humidity sensors and photocatalysts.
ARABIAN JOURNAL OF CHEMISTRY
(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)