Article
Materials Science, Ceramics
Linh H. Vu, An T. Pham, Nguyen Duy Thien, Nguyen Hoang Nam, Eric Riviere, Q. Nghi Pham, Nguyen K. Man, Nguyen Thanh Binh, Nguyen T. M. Hong, Le Viet Cuong, Thanh Long Nguyen, Duc H. Tran
Summary: The study examined the effects of adding SnO2 nanoparticles on the enhancement of critical current density (Jc) in Bi1.6Pb0.4Sr2Ca2Cu3O10+& delta; superconductors. Polycrystalline superconductors with varying levels of SnO2 doping were prepared. X-ray diffraction analysis showed that all samples consisted of Bi-2223 and Bi-2212 superconducting phases, with a decrease in the volume fraction of the Bi-2223 phase with SnO2 addition. Scanning electron microscopy data revealed a decrease in grain orientation and porosity with increased SnO2 doping levels. The addition of SnO2 nanoparticles led to an increase in Jc values, with the maximum values achieved at x = 0.002.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
R. Algarni, M. A. Almessiere, Y. Slimani, E. Hannachi, F. Ben Azzouz
Summary: Adding 10 nm nano-dysprosium oxide particles (Dy2O3) to YBa2Cu3O2-d has a significant impact on the pinning mechanisms and strength of pinning centers, enhancing the flux pinning properties. NP-Dy2O3 weakens the linkage between grains and decreases the inter-granular critical current density under low temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Gaurav Kumar, Mamta Dahiya, Rohit Kumar, Dinesh Kumar, Neeraj Khare
Summary: This study investigates the effect of adding potassium niobate (KNbO3) nanoparticles (NPs) on the pinning properties of YBCO compound. YBCO:xKNbO(3) (x = 0-1 wt%) nanocomposites were synthesized via a two-step process. The addition of KNbO3 NPs improved the critical current density (J(C)) and pinning properties of YBCO, with the highest enhancement observed in YBCO:0.5wt%KNbO3 nanocomposites. Furthermore, the decay rate of J(C) decreased in the nanocomposites compared to YBCO, indicating enhanced pinning properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Applied
Yongqiang Pan, Nan Zhou, Bencheng Lin, Jinhua Wang, Zengwei Zhu, Wei Zhou, Yue Sun, Zhixiang Shi
Summary: Fe1+yTe0.6Se0.4 shows great potential for applications due to its high critical current density (J(c)) and upper critical magnetic field (H-c2). However, the anisotropy of J(c) and the flux-pinning mechanism remain unclear. In this study, the anisotropy of J(c) in Fe1+yTe0.6Se0.4 was observed, and the origin of the anisotropy was discussed. The relationship between the pinning force density (F-p) and the field was analyzed, revealing a non-scaling behavior. The dominant pinning type in Fe1+yTe0.6Se0.4 was confirmed to be normal point pinning based on vortex dynamics analysis.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Soon-Gil Jung, Duong Pham, Jung Min Lee, Yoonseok Han, Won Nam Kang, Tuson Park
Summary: Surface damage induced by low energy ion irradiation can significantly enhance the critical current density (J(c)) and irreversible magnetic field (H-irr) of MgB2 thin films. This improvement is attributed to the introduction of additional point defects and atomic lattice displacement, leading to a change in the pinning mechanism from weak collective pinning to strong plastic pinning.
CURRENT APPLIED PHYSICS
(2021)
Article
Physics, Multidisciplinary
Sarah A. Alotaibi, Yassine Slimani, Munirah A. Almessiere, Essia Hannachi, Fatimah O. Al-qwairi, Munawar Iqbal, Faten Ben Azzouz, Ghulam Yasin
Summary: The study examined the combined effect of adding different weight percentages of nano-BaTiO3/WO3 particles in bulk YBCO superconductor, showing a reduction in orthorhombic distortion with increasing content of nanoparticles. The addition of BTO and WO3 nanoparticles led to alterations in critical transition temperature (Tc) and enhancement in self-field critical current density (Jc) and flux-pinning force (Fp) values in the YBCO superconductor.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Applied
Ahmad Shadkamfar, Mehdi Hosseini, Ali Moftakharzadeh
Summary: This study examines the influence of pinning centers on the critical current density of superconducting tapes. Vortex dynamics were studied by considering the interaction between vortices and pinning centers, as well as temperature fluctuations. Results showed that the critical current density decreases as magnetic flux increases. Additionally, a column-ordered pinning centers lattice was found to improve the critical current density for fields higher than the first matching field.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Muralidhar Miryala, Kotaro Kitamoto, Sai Srikanth Arvapalli, Dhruba Das, Milos Jirsa, Masato Murakami, Sri Ramachandra Rao Mamidanna
Summary: A certain increment in critical current density (J(c)) of bulk MgB2 has been achieved by using amorphous boron precursor and Dy2O3 doping. The optimal doping range of Dy2O3 is found to be 0.5-1.5 wt%, resulting in a high self-field J(c) of approximately 380 kA cm(-2) at 20 K. An improved high-field performance of 90 kA cm(-2) at 2 T, 20 K is observed with 1 wt% Dy2O3 doping. Raman studies show an increase in the phonon density of states (PDOS) with increasing Dy2O3 doping.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Ceramics
An T. Pham, Dzung T. Tran, Linh H. Vu, Nang T. T. Chu, Nguyen Duy Thien, Nguyen H. Nam, Nguyen Thanh Binh, Luu T. Tai, Nguyen T. M. Hong, Nguyen Thanh Long, Duc H. Tran
Summary: The effects of adding TiO2 nanoparticles on the flux pinning properties of the BPSCCO system were investigated. The addition of TiO2 decreased the volume fraction of Bi-2223 and degraded the texture structure of the samples. However, it enhanced the critical temperature and critical current density for certain doping levels.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Tatiana Prikhna, Alexander Kasatkin, Michael Eisterer, Viktor Moshchil, Andrii Shapovalov, Jacques Rabier, Anne Jouline, Xavier Chaud, Matthew Rindfleisch, Michael Tomsic, Semyon Ponomaryov
Summary: The critical current and pinning forces in MgB2 are most influenced by impurity oxygen distribution, higher borides inclusions, and carbon doping, whereas twin density and density of Y211 inclusions are relevant in MT-YBCO.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Physics, Applied
Daxing Huang, Di Chen, Hao Dong, Kai Wang, Wei-Kan Chu, Tongxin Wang, Meiqi Wang, Kaigui Zhu, Hongwei Gu, Zhifeng Ren, Fazhu Ding
Summary: Irradiation can precisely control defects and improve the superconducting properties of REBa2Cu3O7-delta (REBCO) coated conductors (CCs). Co-irradiation with O ions and protons significantly enhances the critical current density (J (c)) of GdBCO films, especially at low temperatures and high magnetic fields. Commercial CCs can nearly double their in-field J (c) through this cooperative irradiation-induced defect method.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
P. Paturi, H. Huhtinen
Summary: We present a method to achieve the maximum critical current density, J(c), for YBa2Cu3O6+x (YBCO) thin films. By optimizing both the mean free path and the flux pinning structure, the maximum values can be reached.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Hirofumi Yamasaki
Summary: The temperature dependence of the self-field and in-field critical current densities J(c)(T) was studied in YBa2Cu3O7-delta thin films with a high density of nanoprecipitates. The self-field J(c) is mainly influenced by flux pinning from relatively large nano-precipitates, while the in-field J(c) is affected by other factors.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Probhu Mandal, Doyel Rakshit, Tasaul Sk, Ajay Kumar Ghosh
Summary: This study investigates the transport critical current density at zero magnetic field and the magnetic critical current density in a composite system of bulk YBCO superconductor and insulating BTO. The vortex pinning behavior by BTO nanoparticles is explored, and the possibility of a transition from collective pinning to strong pinning and its dependence on BTO are analyzed based on the LO theory. The potential scenario of strong pinning induced by insulating nanoparticles is also studied using an exponent.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Rahmatul Hidayati, Jin Hee Kim, Soon-Gil Jung, Ki-Sub Cho, Jae Hyun Yun, Jong-Soo Rhyee
Summary: We investigated the superconducting properties of medium entropy alloys Nb2/5Hf1/5Zr1/5Ti1/5 synthesized by different methods. The samples exhibited different superconducting transition temperatures and critical magnetic fields. The spark plasma sintering method showed better performance in critical current density, suggesting possible practical applications.
Article
Chemistry, Applied
S. Akhtar, M. A. Almessiere, B. Unal, A. Demir Korkmaz, Y. Slimani, N. Tashkandi, A. Baykal, A. Ul-Hamid, A. Manikandan
Summary: Microspheres of Ni0.5Co0.5GaxFe2-xO4 (x≤1.0) spinel ferrites (NiCoGaFe-MSFs) and carbon spheres were synthesized via a hydrothermal technique. The microstructure of the microspheres was characterized using SEM, TEM, and XRD. The electrical and dielectric properties of NiCoGaFe-MSF were systematically studied at temperatures ranging from 20 to 120 degrees C (293.1 x 103 to 393.1 x 103) and frequencies up to 3.0 MHz. The results showed that the conductivity, dielectric properties, and impedance spectra of NiCoGaFe-MSFs were influenced by the Ga ion substitution ratios. The formation of semicircles in the impedance spectra was temperature-dependent, indicating a relaxation mechanism. The findings provide valuable insights for the design and application of spinel ferrite-based materials.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Physical
Komal Rizwan, Muhammad Bilal, Yassine Slimani, Pau Loke Show, Sami Rtimi, Arpita Roy, Hafiz M. N. Iqbal
Summary: Increasing global concern over hazardous pollutants in water bodies due to their toxicity and threat to the environment has led to the need for new or upgraded remediation methods. Advanced oxidation processes (AOPs) utilizing highly reactive oxidizing radicals like center dot O and center dot OH have shown efficacy in the mineralization of dye pollutants. Sonolysis, a newer AOP that employs ultrasound irradiation for generating oxidizing radicals, has become a robust hybrid AOP for degrading environmental contaminants. This review focuses on the degradation of dyes through ultrasound-based AOPs and discusses different sono-based methods and their efficacy for wastewater treatment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Essia Hannachi, Firdos Alam Khan, Yassine Slimani, Suriya Rehman, Zayneb Trabelsi, Sultan Akhtar, Ebtesam A. Al-Suhaimi
Summary: This study explores the structure, microstructure, anticancer, and antibacterial activities of ZnO NPs co-doped with Y and Ce elements, highlighting their strong biocompatibility, economic advantages, and less toxic effects. The results showed that the co-doping significantly reduced the viability of cancer cells, while having a lesser impact on non-cancerous cells. Furthermore, the co-doping demonstrated inhibitory effects on both Gram-positive and Gram-negative bacteria.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
M. A. Almessiere, H. Erdemi, A. Sadaqat, Y. Slimani, A. Baykal, M. A. Gondal
Summary: Hard-soft CoFe2O4/Ni0.3CuxZnyFe2O4 (x, y <= 0.5) nanofibers were synthesized and the effect of co-substitution of Cu and Zn on the dielectric properties was investigated. Microstructure and morphology were studied using various techniques. The dielectric features were evaluated as a function of frequency and temperature, and the conductivity behavior showed dependence on temperature and frequency. The conduction mechanism was analyzed using Cole-Cole plots and Koop's model.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Sherwan M. Mahdi Ismail, Sabah M. Ahmed, Ahmed Fattah Abdulrahman, Munirah A. AlMessiere
Summary: Zinc oxide (ZnO) nanoparticles were synthesized using leaf extracts from the Pinus Brutia (PB) tree. The impact of PB tree extracts and different pH values on the characteristics of ZnO NPs was investigated. The study showed that PB leaf extracts had a strong absorption peak at 275.3 nm in the UV-Visible spectrum. The FESEM analysis revealed that pH values affected the morphology and size of the GS ZnO NPs. XRD data confirmed that the GS ZnO NPs had a hexagonal and wurtzite crystal structure. UV-Visible analysis showed significant absorption peaks for ZnO NPs made at different pH levels, with high absorption in the UV range. The band-gap energy measured was in the range of 2.6-2.724 eV. Based on the results, GS ZnO NPs produced at pH 8 showed good quality and improvement compared to other pH values.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Crystallography
Essia Hannachi, M. I. Sayyed, Suhairul Hashim, Karem Mahmoud, Yassine Slimani
Summary: This research aims to study the radiation-protecting characteristics of calcium titanate (CaTiO3) perovskite-based ceramic material. The ceramics were prepared using the solid-state reaction method and treated at different temperatures. XRD and FT-IR analysis revealed a CaTiO3 phase formation with an orthorhombic structure. The size of the crystallites increased with rising temperatures, and the relative density also showed an increase. Monte Carlo simulation was used to assess the impact of temperature on the radiation-protecting characteristics, showing a decrease in gamma-photons average track length and an increase in the linear attenuation coefficient with temperature rise.
Article
Crystallography
Essia Hannachi, Karem G. Mahmoud, Yassine Slimani, M. I. Sayyed, Jack Arayro, Yasser Maghrbi
Summary: A series of barium titanate ceramics were prepared using the solid-state reaction route at various sintering temperatures. The structure of the ceramics was examined using X-ray diffraction and FTIR spectroscopy. Optical bandgap energy was estimated through UV-Vis-reflectance data. The ceramics' ability to attenuate ionizing radiation was evaluated using Monte Carlo simulation, and shielding parameters were assessed.
Article
Materials Science, Multidisciplinary
S. Caliskan, M. A. Almessiere, A. Baykal, Y. Slimani
Summary: Using first principles calculations, this study elucidates the influence of Se dopants on the electronic structure, magnetic and optical characteristics of CoNiFe2O4 spinel ferrites. The results show that Se dopants replace O atoms in the supercell, affecting the electronic structure, magnetism, and optical properties. The findings suggest that the energy band gap decreases with increasing Se concentration, and depending on the site occupation, a half metallic characteristic can be achieved. The significant spin polarization and promising optical characteristics indicate that Se doped CNFO spinel ferrites are potential candidates for spin dependent applications and visible light photocatalysis.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Y. Slimani, M. A. Almessiere, A. Baykal, S. E. Alsulaim, S. V. Trukhanov, D. S. Klygach, T. I. Zubar, M. G. Vakhitov, A. V. Trukhanov, R. Jermy, A. Ul-Hamid
Summary: The nanosized spinel ferrites (NSFs) of Co0.5Ni0.5ScxFe2-xO4 (x < 0.1), CoNiSc, were synthesized by sol-gel approach. The structural and phase formation were investigated using XRD, SEM, TEM, and HR-TEM, showing the formation of single-phase cubic spinel structure. The magnetic properties were strongly influenced by the introduction of Sc3+ ions. Microwave properties analysis revealed an increase in resonant frequency and amplitude with Sc substitution.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
S. Caliskan, M. A. Almessiere, A. Baykal, A. Demir Korkmaz, H. Gungunes, Z. Alsalem, Y. Slimani, E. Gokce Polat
Summary: Praseodymium ion (Pr3+) substituted Ni0.5Co0.5Fe2O4 nanospinel ferrites were synthesized via sonochemical route and showed a single cubic structure with a crystallite size of 9-11 nm. The morphology analysis revealed spherical particles. The magnetic study indicated an increase in superparamagnetic character with the addition of Pr3+ ions. The magnetic parameters showed dependence on cation distribution. The evaluation of Pr -> CoNi (x <= 0.10) NSFs received a score of 8 out of 10.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Physical
M. Sertkol, Y. Slimani, M. A. Almessiere, A. Baykal, S. Akhtar, E. G. Polat, S. Caliskan
Summary: Mn0.5Zn0.5DyxEuxFe2-2xO4 (x <= 0.1) nanospinel ferrites were synthesized using ultrasonication. The samples exhibited cubic spinel phase without impurities and nanostructure confirmed by XRD, TEM, and SEM. DR spectra revealed energy band gaps between 2.44 and 2.56 eV. The magnetic properties of DyEu -> MnZn (x <= 0.1) NSFs were influenced by Eu3+-Dy3+ ion inclusion, showing superparamagnetic and ferromagnetic behavior.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
E. Hannachi, M. I. Sayyed, Y. Slimani, M. A. Almessiere, A. Baykal, M. Elsafi
Summary: This study synthesized novel BTO/MnZnFeO ceramic composites via cost-effective and environmentally friendly approaches, and evaluated their crystal structure and shielding performance against gamma radiation. The X-ray diffraction results showed no chemical reaction within the MnZnFeO and BTO phases in the bi-phasic ceramic composites. The size of the crystallite decreased with increased MnZnFeO content. The experiments demonstrated the improved attenuation parameters of the BTO/MnZnFeO ceramic composites, including linear attenuation coefficients, half-value layer, average tenth value layer, and radiation absorption ratio. These composites performed well in shielding gamma radiation with photon energy lower than 100 keV.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
C. Bhagya Lakshmi, S. Anna Venus, S. Velanganni, A. Muthukrishnaraj, Manikandan Ayyar, Mohamed Henini
Summary: This study investigates the use of V2O5/ZnO and rGO-V2O5/ZnO nanocomposites as photoanodes to improve the power conversion efficiency of dye-sensitized solar cells. The structural and electrical characteristics of these nanocomposites are analyzed, and it is found that they can significantly enhance the performance of the solar cells.
Article
Chemistry, Multidisciplinary
Pitcheri Rosaiah, Ponnusamy Divya, Sangaraju Sambasivam, Ammar M. Tighezza, V. Kalaivani, A. Muthukrishnaraj, Manikandan Ayyar, Theophile Niyitanga, Haekyoung Kim
Summary: MnO2 NWs/MWCNT and MnO2 NWs/rGO composites were synthesized using a hydrothermal method, showing high specific discharge capacity and excellent cycling stability.
Article
Chemistry, Physical
Ghulam Abbas, Francisco C. Franco Jr, S. Janani, J. N. Cheerlin Mishma, A. Manikandan, S. Muthu, Christopher E. Anson
Summary: A new dimeric complex was synthesized through a one-pot reaction in MeOH and characterized by infrared spectroscopy, elemental analysis, and single crystal X-ray diffraction. The theoretical study and molecular docking analysis revealed the structural properties and potential biological activity of the complex.
JOURNAL OF MOLECULAR STRUCTURE
(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)
