Article
Chemistry, Analytical
M. Diaz, K. Doederer, J. Keller, M. Cataldo, B-C Donose, Y. Ali, P. Ledezma
Summary: This study investigated the mechanisms governing ferrate electro-generation using different sacrificial iron materials as electrodes. It was found that the stability of the electrode and the presence of silicon influenced the efficiency of ferrate generation, with grey cast iron showing significantly enhanced performance compared to other materials.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Automation & Control Systems
Mohammed Abdul Khalik, Saden H. Zahiri, Syed H. Masood, Suresh Palanisamy, Stefan Gulizia
Summary: This study investigates the effects of in situ electro-plastic treatment (ISEPT) on the microstructure evolution of commercially pure titanium, showing that the treatment can lead to grain refinement and an increase in microhardness while reducing costs and energy consumption.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
I Cvijovic-Alagic, S. Laketic, J. Bajat, A. Hohenwarter, M. Rakin
Summary: The study found that the HPT treatment significantly improved the grain refinement and hardness of the Ti-45Nb alloy, while also enhancing the corrosion resistance of the alloy in simulated physiological conditions.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zhizhi Wang, Xiaomei Gu, Haijun Pan
Summary: A novel cyclic quenching process was proposed to refine the microstructure and improve the mechanical properties of 18CrNiMo7-6 steel. The results showed that the cyclic quenching treatment led to a finer and more uniform distribution of average austenite, and significantly increased the ultimate tensile strength, total elongation, and hardness value of the steel. Multi-cycle treatment played an important role in enhancing the mechanical properties of the steel.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Abhishek Rastogi, Suresh Neelakantan
Summary: In this study, stress-induced martensitic transformation (SIMT) has been effectively demonstrated to achieve a significant cold reduction of -43% and -45% in the metastable Ti-10V-2Fe-3Al and Ti-5Al-5V-5Mo-3Cr alloys, respectively. The presence of stress-induced alpha '' martensites provides preferential nucleation sites for new strain-free grains formation upon recrystallization annealing. Thermomechanical treatment results in a grain refinement of -93% and -80% for Ti-1023 and Ti-5553 alloys, respectively. The diffusivities of alloying elements, such as Fe, Mo, V, Cr, and Al, have been confirmed to alter the stability of the fl phase during recrystallization annealing, as evidenced by Electron Probe Micro Analyzer (EPMA). The effect of grain size on the SIMT ability based on microhardness variations has also been deduced.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Esmaeil Damavandi, Salman Nourouzi, Roohollah Jamaati, Sayed Mahmood Rabiee, Jerzy A. Szpunar
Summary: The precipitation behavior in an Al-Si-Cu alloy during ECAP at 400 degrees C was investigated. The solution-treated A390 Al alloy showed improved tensile properties after ECAP, with enhanced strength and ductility. The high-temperature ECAP process led to refinement and modification of microstructure, enhancing the overall mechanical properties of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Energy & Fuels
Sheharyar Pervez, Muhammad Zahir Iqbal
Summary: This study explores the energy storage profile of a strontium sulfide electrode and analyzes its capacitive and diffusive contributions using a model, while examining the correlation between regression parameters. It aims to uncover electrochemical features that are obscured by current methods of presenting data in cyclic voltammetry experiments.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Materials Science, Multidisciplinary
Hamed Mirzadeh
Summary: This review paper focuses on the grain refinement and dynamic recrystallization (DRX) of Mg alloys during hot working. The grain refinement methods for Mg alloys, including solidification, fusion-based and solid-state metal additive manufacturing, annealing, and severe plastic deformation, are overviewed. The critical conditions, flow behaviors, microstructural evolution, and necklace formation during DRX in Mg alloys are summarized. The dependency of DRX grain size and its kinetics on deformation conditions, initial microstructure, alloying elements, dynamic precipitation, and particle stimulated nucleation are critically discussed. Furthermore, metadynamic recrystallization and the improvement of mechanical properties, such as strength-ductility synergy and superplasticity, are overviewed. Research gaps and future suggestions are also introduced.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Shouzhen Cao, Jianchao Han, Hongfeng Wang, Shulong Xiao, Lijuan Xu, Yuyong Chen
Summary: Cyclic heat treatment is effective in improving the microstructure and properties of the as-cast Ti-46Al-1Cr-2V alloy. The treatment results in refined grain size and increased elongation at room temperature. The treated alloy shows excellent tensile strength and plasticity at 800 degrees C due to fine grain strengthening and complex twinning movement.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Panjun Wang, Lingwei Ma, Xuequn Cheng, Xiaogang Li
Summary: The study found that grain refinement can decrease corrosion resistance in one type of solution but increase it in another; grain refinement can induce self-passivation, and the presence of texture can result in anisotropic corrosion behavior in low alloy steels.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Seungkyun Yim, Huakang Bian, Kenta Aoyagi, Akihiko Chiba
Summary: The study introduced a multi-stage heat treatment method to refine the microstructure of Ti-48Al-2Cr-2Nb alloy, achieving a tailored duplex structure with improved tensile strength and elongation. This study provides a simple pathway to refine the grain size and interlamellar spacing of gamma-TiAl alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Construction & Building Technology
Xin Yu, An Yuan, Gan Cui, Jianguo Liu, Xiao Xing, Zili Li
Summary: Stray current discharged by subway trains into the soil can cause pipe-soil potential fluctuations and severe corrosion. This study investigated the pitting corrosion behavior of X70 steel in a weakly alkaline simulated soil solution under different potential fluctuation ranges. Electrochemical measurement and surface characterization were used to study the influence of pipe-to-soil potential fluctuation on passivation film and pitting corrosion. X70 steel exhibited passivation characteristics in the weakly alkaline solution, with the passivation film showing a dynamic process of continuous growth or growth-dissolution due to alternating polarization. The density of the passivation film determined the initiation and development trend of pitting.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wenxue Zhang, Hailin He, Youping Yi, Shiquan Huang
Summary: Rings made of 2219 Al alloy often have poor mechanical properties due to coarse elongated grains and a large number of coarse Al2Cu particles. A novel thermomechanical process was tested to refine the microstructure and improve the mechanical properties. The process involved higher temperature multi-directional forging and lower temperature ring rolling, resulting in increased spherical shapes, reduced coarse Al2Cu particles, and finer grain structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Guan-Qiang Wang, Ming-Song Chen, Hong-Bin Li, Y. C. Lin, Wei-Dong Zeng, Yan-Yong Ma
Summary: The study investigated the uniform refinement mechanisms in a Ni-based superalloy during two-stage annealing treatment. By selecting suitable times for aging annealing treatment and recrystallization annealing treatment, a mixed microstructure with abnormal coarse recrystallization grains and fine grains can be achieved.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Mouna Nacef, Mohamed Lyamine Chelaghmia, Omar Khelifi, Maxime Pontie, Meriem Djelaibia, Randa Guerfa, Valerie Bertagna, Christine Vautrin-Ul, Aissat Fares, Abed Mohamed Affoune
Summary: This study focuses on the electrocatalytic oxidation of glycerol using Ni modified pencil graphite electrodes in alkaline solution. The Ni/PGEs elaborated at pH = 6.92 showed the best performance for glycerol electrooxidation. Moreover, glycerol demonstrated better electrooxidation performance compared to ethanol at 35 and 45 degrees Celsius.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Aliakbar Taghipour, Yousef Mazaheri, Jascha McDavid, Shahram Sheikhi, Moritz Braun, Junjun Shen, Benjamin Klusemann, Soeren Ehlers
Summary: The microstructure-properties relations and strengthening mechanisms of additively manufactured 316L stainless steel were comprehensively investigated in this study. The orientation dependency and strain hardening were studied, showing higher strength and better strength-elongation balance for the laser-based powder bed fusion (LPBF) samples compared to the wrought material.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Ceramics
Mohsen Soleimani, Arash Fattah-alhosseini, Hassan Elmkhah, Kazem Babaei, Omid Imantalab
Summary: This study evaluates the tribological and corrosion behavior of nano-structured CrN/CrAlN and CrCN/CrAlCN coatings applied on 430 stainless steel. The coatings were characterized using X-ray diffraction, field emission scanning electron microscopy, and nano-indentation techniques. The adhesion of the coatings to the substrate was also evaluated. The results showed that CrCN/CrAlCN exhibited the lowest friction coefficient and better resistance against corrosion compared to the CrN/CrAlN coating, which can be attributed to its higher hardness, denser structure, lower surface roughness, and low wettability.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yemurai Vengesa, Arash Fattah-alhosseini, Hassan Elmkhah, Omid Imantalab, Mohsen K. Keshavarz
Summary: This study investigated the tribological and corrosion performances of as-deposited and annealed CrN/CrAlN multilayer coatings on 304 stainless steel substrates deposited by cathodic arc evaporation process. The results showed that annealing led to the decomposition of CrN into Cr2N. Additionally, the surface roughness and wettability of the annealed samples increased as the annealing temperature increased. The hardness decreased due to the increase in crystallite size. The sample annealed at 400 degrees C exhibited the lowest wear rate and the specimen annealed at 700 degrees C showed the highest corrosion resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Mosab Kaseem, Tehseen Zehra, Tassawar Hussain, Young Gun Ko, Arash Fattah-alhosseini
Summary: This work investigated the influence of sealing treatment on the structural and electrochemical properties of AZ31 Mg alloy coated by plasma electrolytic oxidation (PEO). The results showed that sealing in hot solutions triggered hydration reactions and promoted the incorporation of Co3O4 into the coating. In contrast, sealing in cold solutions resulted in less compact coatings. A nearly fully sealed coating with high electrochemical stability was successfully formed in the hot solution containing 1 gr of cobalt nitrate hexahydrate.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Mosab Kaseem, Tehseen Zehra, Burak Dikici, Ali Dafali, Arash Fattah-alhosseini
Summary: The formation of inorganic-organic hybrids (IOH) on metallic substrates plays a crucial role in improving their structural and functional features. In this study, an organic coating (OC) consisting of coumarin-3-carboxylic acid (3-CCA) and albumin (ALB) was grown on an inorganic layer (IC) produced by plasma electrolysis of AZ31 Mg alloy. The synergistic actions between OC and IC resulted in the formation of a flake-like structure that sealed the structural defects of IC and provided chemical protection and photocatalytic performance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Review
Chemistry, Physical
Zahra Pouramini, Seyyed Mojtaba Mousavi, Aziz Babapoor, Seyyed Alireza Hashemi, Chin Wei Lai, Yousef Mazaheri, Wei-Hung Chiang
Summary: The use of antibiotics and dyes has caused severe water pollution and health risks, necessitating their elimination from water sources. Adsorption and photodegradation are economical, simple, and reusable methods for removing harmful water contaminants. Metal-organic frameworks (MOFs), such as ZIF-8 and ZIF-67, are effective adsorbents and photocatalysts due to their high porosity, adjustability, and crystal structure. This article reviews the design and synthesis methods of ZIF-8 and ZIF-67 composites and discusses their role as adsorbents and photocatalysts in wastewater pollution removal, aiming to provide insights for the development of highly effective ZIF-8/67-based materials.
Review
Chemistry, Multidisciplinary
Seyyed Mojtaba Mousavi, Seyyed Alireza Hashemi, Masoomeh Yari Kalashgrani, Ahmad Gholami, Yousef Mazaheri, Mohsen Riazi, Darwin Kurniawan, Mohammad Arjmand, O. Madkhali, Mahmood D. Aljabri, Mohammed M. Rahman, Wei-Hung Chiang
Summary: The increasing demand for clean and reliable energy sources has led to a surge in academic interest in harnessing the potential of biological resources for energy generation and storage. This review evaluates recent progress in bio-based polymer composites for energy generation and storage, discussing energy storage systems such as supercapacitors and batteries, as well as the future possibilities of solar cells. The review also examines the current state of high-performance equipment for each technology and explores the prospects and opportunities of using bioresources for energy generation and storage, and developing cost-effective polymer composites for solar cells.
Article
Materials Science, Ceramics
Erfan Lotfi-Khojasteh, Hassan Elmkhah, Meisam Nouri, Omid Imantalab, Arash Fattah-Alhosseini
Summary: The wear and electrochemical behaviors of CrN/AlCrN multilayered coatings annealed at different temperatures were investigated in this study. The deposition of the coatings was done using the cathodic arc evaporation technique. Characterization techniques such as SEM, field emission SEM, X-ray diffraction, and Rockwell-C indenter were used to analyze the coatings and the interdiffusion between the layers. The results showed that the interdiffusion of the layers increased with increasing annealing temperature, leading to changes in mechanical and corrosion properties of the coatings.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mosab Kaseem, Arash Fattah-alhosseini
Summary: This study investigates the effect of iron nitrate on the corrosion behavior of a 6061 Al alloy treated with a plasma electrolytic oxidation coating. PEO coatings were applied on Al alloy samples using an alkaline-aluminate electrolyte with and without iron nitrate. The presence of iron nitrate resulted in the integration of Fe2O3 particles into the coating layer and reduced the porosity and size of micropores formed during plasma activity. As a result, the coating formed in the electrolyte with iron nitrate exhibited superior corrosion resistance compared to the one without iron nitrate.
Article
Materials Science, Multidisciplinary
Maryam Molaei, Arash Fattah-Alhosseini, Meisam Nouri, Mosab Kaseem
Summary: This study investigates the effect of incorporating anatase TiO2 nanoparticles at three different concentrations into ceramic-like oxide plasma electrolytic oxidation (PEO) coatings on pure titanium substrate on their friction and wear behavior in simulated body fluid (SBF) aqueous solution. The wear performance of the coatings was characterized using a ball-on-disk friction and wear tester, and the morphology and dimensions of wear tracks were analyzed by scanning electron microscopy (SEM) and 2D depth profilometry. The results showed that the concentration of TiO2 nanoparticles strongly influenced the coefficient of friction, wear volume loss, and wear rate of the coatings, with coatings containing TiO2 nanoparticles exhibiting lower COF, less wear volume loss, reduced wear rate, and improved wear resistance compared to coatings without TiO2 nanoparticles. The coating with 3 g/L of TiO2 nanoparticles demonstrated the best wear protection properties among all the coatings tested.
Article
Materials Science, Ceramics
Maryam Sadat Sharifiyan, Arash Fattah-Alhosseini, Minoo Karbasi
Summary: WO3 nanoparticles were grown hydrothermally on porous titania (TiO2) PEO-coated on Ti in an alkaline electrolyte using pulsed direct current mode. The hydrothermal parameters including precursor concentration, temperature, and time were optimized to achieve the best photodegradation of methylene blue mediated by the PEO/HT hybrid coatings under visible illumination. The improvement in photocatalytic performance was attributed to the participation of more WO3 nanoparticles and the expansion of the light absorption range of TiO2 up to the visible light range.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Hamed Bahramian, Arash Fattah-alhosseini, Minoo Karbasi, Elham Nikoomanzari, Stefanos Giannakis
Summary: In this study, copper oxide-embedded TiO2 coatings were introduced on pure titanium through plasma electrolytic oxidation, which exhibited photocatalytic capacity for tetracycline degradation. The impact of ionization process and temperature on the photocatalytic efficiency were investigated. Coatings containing CuO nanoparticles showed finer micropores, higher specific areas, and higher wettability. The highest photocatalytic efficiency reached 70% and could be increased to 92% under specific conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Sina Yaghoubi, Aziz Babapoor, Sayyed Mojtaba Mousavi, Seyyed Alireza Hashemi, Vahid Rahmanian, Ahmad Gholami, Navid Omidifar, Mojtaba Binazadeh, Fatemeh Fallahi Nezhad, Yousef Mazaheri, Wei-Hung Chiang, Chin Wei Lai
Summary: Metal-organic framework (MOF) membranes, constructed with organic ligands and metal ions or clusters, have wide applications in biomedicine. However, there are still fundamental gaps in the studies on MOF membranes.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ahmad Keyvani, Neda Kamkar, Razieh Chaharmahali, Milad Bahamirian, Mosab Kaseem, Arash Fattah-alhosseini
Summary: Orthopaedic implants often use magnesium and its alloys, which have better mechanical compatibility with bone tissue but lower corrosion resistance. This study investigated the use of plasma electrolytic oxidation (PEO) to modify the surface of AZ31 magnesium alloy and examined the effects of different concentrations of hydroxyapatite (HA) nanoparticles on coating morphology and corrosion characteristics. The sample with 3 g/l HA showed the best anticorrosion performance with the smallest average pore size, thickest coating, and lowest corrosion current density.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Reza Hosseini, Arash Fattah-alhosseini, Minoo Karbasi, Stefanos Giannakis
Summary: In this study, a visible light-responsive black TiO2 photocatalytic coating with controlled formation of oxygen vacancies and Ti3+ species was developed to enhance photocatalytic reactions. By precisely controlling semiconductor defects, electron/hole recombination is reduced and the band gap is narrowed, leading to improved catalytic efficiency. The results demonstrate exceptional stability and effectiveness of the coating in tetracycline degradation.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
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)
