Article
Materials Science, Multidisciplinary
Shahzadi Noreen, Abid Hussain
Summary: The nanostructured Cu0.25M0.75Fe2O4 (M = Mn, Mg, Ni, Co) ferrites were synthesized by the sol-gel auto-combustion method, and their structural, magnetic, morphological, and optical properties were investigated. XRD, UV-Vis, VSM, SEM, EDX, and FTIR were employed for characterization. The obtained spinel ferrites were found to be single-phased spinels with no secondary phase peaks. The substitution of M in Cu0.25M0.75Fe2O4 ferrites affected their magnetic properties, resulting in a transition from ferrimagnetic to ferromagnetic behavior. The UV-Vis analysis showed that the ferrites had a direct band gap.
Article
Chemistry, Physical
Asma Mohammadi Badizi, Hamed Maleki
Summary: In this study, (ZrO2)(1-x)-(CoFe2O4)(x) (0 ≤ x ≤ 1) nanoceramics were synthesized using the modified sol-gel method, and their structural, morphological, magnetic, optical, and thermal properties were investigated. The results confirmed the formation of zirconium oxide, cobalt ferrite, and nanocomposites, and showed the enhancement of magnetic properties and a significant reduction in optical band-gap. The system has promising application for magnetic photo-catalysts and in biomedical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Chemistry, Physical
Vasyl Mykhailovych, Andrii Kanak, Stefana Cojocaru, Elena-Daniela Chitoiu-Arsene, Mircea Nicolae Palamaru, Alexandra-Raluca Iordan, Oleksandra Korovyanko, Andrei Diaconu, Viorela Gabriela Ciobanu, Gabriel Caruntu, Oleh Lushchak, Petro Fochuk, Yuriy Khalavka, Aurelian Rotaru
Summary: In this study, spinel-type MgCr2O4 nanoparticles were synthesized using a sol-gel auto-combustion method with fructose, tartaric acid, and hexamethylenetetramine as chelating/fuel agents. The formation of impurity-free MgCr2O4 nanostructures was optimal at temperatures ranging from 500 to 750 degrees C. Characterization techniques such as FTIR, UV-VIS spectrophotometry, XRD, EDX, and FE-SEM were used to study the properties of the synthesized nanoparticles, revealing the importance of the chelating/fuel agent nature and energy release during auto-combustion on the final properties of MgCr2O4 nanoparticles.
Article
Engineering, Chemical
R. Mithun Prakash, C. Ningaraju, K. Gayathri, Y. N. Teja, M. Aslam Manthrammel, Mohd. Shkir, S. AlFaify, M. Sakar
Summary: This paper reports a solution auto-combustion (AC) process for the rapid synthesis of Fe3O4 nanoparticles derived from the sol-gel (SG) process. By using citric acid (CA) and tartaric acid (TA) as gelling agents in the SG process, citric acid acts as a fuel that combusts the gel and yields highly magnetic crystalline Fe3O4 nanoparticles in one step. In contrast, different concentrations of citric acid and any concentrations of tartaric acid do not induce combustion and only result in amorphous iron oxides. Upon annealing, the CA and TA derived iron oxide samples transform into crystalline alpha-Fe2O3 particles. Photocatalytic studies show that the synthesized Fe3O4 nanoparticles exhibit higher photocatalytic efficiency and stability under simulated solar light irradiation.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
R. M. Kershi
Summary: Rare-earth ions substitution can alter the properties of spinel nanoscale structures, as seen in the study on erbium-doped zinc-cobalt ferrite nanoparticles. The compounds exhibit a coexistence of spinel and orthoferrite phases with erbium ions content around 0.21. Doped compounds show improved mechanical and microstructural properties with lower gamma values, along with low particle size and high Curie temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Lingyu Liu, Chuang Li, Zihua Wang, Xue Zhong Wang
Summary: A new method for synthesizing Ni nanoparticles was presented, and its effectiveness was verified through the observation of sample properties under different conditions. Compared with other methods, this new approach is not only easier to scale up but also more environmentally friendly.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Md Abdullah-Al-Mamun, M. S. Sarker, M. R. Hasan, M. M. Haque, F. A. Khan, M. M. Rahman, M. K. R. Khan
Summary: The study found that the Er content has a significant impact on the crystalline structure and magnetic properties of CoFe2-xErxO4 nanoparticles, optimizing material performance by reducing crystallite size and increasing coercivity.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Ceramics
M. Rocha, Francisca P. Araujo, S. Castro-Lopes, Idglan S. de Lima, Edson Cavalcanti Silva-Filho, Josy Anteveli Osajima, Carla S. Oliveira, Bartolomeu C. Viana, Luciano C. Almeida, Y. Guerra, R. Pena-Garcia
Summary: In this study, the influence of Fe and Pr addition on the structural, optical, and antibacterial properties of spherical ZnO nanoparticles synthesized via sol gel method was investigated. The lattice constants values increased while the average crystallite size decreased with varying Pr concentration. Raman and FTIR spectroscopies confirmed the single-phase formation of ZnO and the presence of oxygen vacancies. The samples exhibited agglomerated spherical morphology and the textural properties were affected by the inclusion of Fe. The synthesized materials showed promising antimicrobial activity against Escherichia coli and Staphylococcus aureus due to nanomaterial-bacteria interactions.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Neha Aggarwal, Sukhleen Bindra Narang
Summary: The study shows that substitution of cobalt and zirconium in nickel-zinc spinel ferrites affects the structure and performance of the materials, with substituted samples exhibiting high dielectric and magnetic losses, and showing excellent microwave absorption performance in the X band at specific thicknesses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Hafiz Muhammad Ahsan, Kanhya Lal, Murtaza Saleem, Ghulam M. Mustafa, Muhammad Ahmad Khan, Ahmed S. Haidyrah, Shahid Atiq
Summary: The synthesis of pure ZnO with nominal Mn and Co co-doping was conducted using a cost-effective wet chemical route to explore their dielectric response. Structural and morphological analysis showed the influence of Mn and Co doping on crystal structure and particle morphology in ZnO. The higher dielectric constant observed was attributed to the presence of oxygen vacancies generated during the process.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
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, Inorganic & Nuclear
Shrikant M. Suryawanshi, Kamlesh Chandekar, Dilip S. Badwaik, Vijay V. Warhate, Nomdeo M. Gahane, Sarang R. Daf
Summary: Multi-metal spinel ferrite nanocrystals of Ni0.3Cu0.3Zn0.4Fe1.4Cr0.6O4 were synthesized using sol-gel auto-combustion route. The structural, magnetic, and dielectric properties of the nanocrystals were affected by calcination temperature. The prepared nanocrystals exhibited different crystallite sizes, lattice strains, dislocation densities, saturation magnetizations, retentivities, coercivities, magnetic anisotropies, dielectric constants, dielectric losses, conductivity values, and impedance values at low-frequency range. These nanocrystals have potential applications in capacitors, recording systems, high-frequency devices, and multilayer chip inductors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
M. S. I. Sarker, Marufa Yeasmin, Md Abdullah Al-Mamun, S. Manjura Hoque, M. K. R. Khan
Summary: The structural and magnetic properties of Gd doped CoFe2O4 nanoparticles synthesized by sol-gel method have been studied, showing their potential applications in various fields.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Loganathan Guganathan, Chinnaiyan Rajeevgandhi, Kaliyamurthy Sathiyamurthy, Kokila Thirupathi, Madhappan Santhamoorthy, Ellappan Chinnasamy, Chaitany Jayprakash Raorane, Vinit Raj, Seong-Cheol Kim, Pichapillai Anand
Summary: In this study, gadolinium orthoferrite nanoparticles were successfully synthesized using the sol-gel auto-combustion technique. The synthesized materials were characterized using various instrumental techniques, including FTIR, FE-SEM, HR-TEM, EDAX, XPS, and VSM. The results revealed the vibrational characteristics, surface morphology, elemental features, and magnetic properties of the gadolinium orthoferrite nanoparticles.
Article
Materials Science, Multidisciplinary
Ayushi G. Patel, Robert C. Pullar, Sher Singh Meena, Rajshree B. Jotania
Summary: Introduction of indium into X-type hexaferrites lattice by replacing iron leads to changes in the proportion of iron ions, reducing magnetization while increasing lattice constants and cell volume. Significant alterations are observed in magnetic, optical, dielectric properties, among others.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Faheem Ahmed, Ghazzai Almutairi, Prince M. Z. Hasan, Sarish Rehman, Shalendra Kumar, Nagih M. Shaalan, Abdullah Aljaafari, Adil Alshoaibi, Bandar AlOtaibi, Kaffayatullah Khan
Summary: Activated carbon derived from biomass (rice husk) with a certain degree of amorphous carbon structure and spherical morphology was synthesized. The activated carbon showed excellent cyclic reversibility and stability with enhanced electrochemical capacitive performance. This study provides insight into using rice husk for the fabrication of anodes, which could be used for renewable energy storage devices in the future.
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: Magnetic nanoparticles of NiFe2O4 were successfully synthesized using sol-gel techniques. The nanoparticles were characterized using various techniques, including X-ray diffraction, transmission electron microscopy, dielectric spectroscopy, magnetization measurements, and electrochemical studies. The results showed that the nanoparticles possessed single-phase nature with face-centred cubic crystalline structure. The average particle size was around 10 nm, and they exhibited ferromagnetic behavior. The nanoparticles also showed high dielectric constant and potential for application in supercapacitors.
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun H. Chae
Summary: CeXO2 (X: Fe, Mn) nanoparticles were synthesized and characterized for their structural, morphological, magnetic, and electrochemical properties. XRD, FE-TEM, dc magnetization, Raman analysis, and NEXAFS analysis confirmed the successful incorporation of Fe and Mn in CeO2 matrix and the formation of FCC fluorite structure. The Fe-doped CeO2 showed the lowest band gap and enhanced room temperature ferromagnetism. Ce0.95Fe0.05O2 electrode exhibited excellent electrochemical performance for energy storage devices.
Article
Chemistry, Multidisciplinary
Faheem Ahmed, Shalendra Kumar, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: In order to meet the growing demand for efficient and sustainable power sources, it is crucial to develop high-performance energy storage systems that are cost-effective and environmentally friendly. This study combines rice husk-activated carbon (RHAC), known for its abundance and low cost, with MnFe2O4 nanostructures to improve the overall capacitance and energy density of asymmetric supercapacitors (ASCs).
Article
Crystallography
Faheem Ahmed, Tentu Nageswara Rao, Nishat Arshi, Y. Prashanthi, Shalendra Kumar, Adil Alshoaibi
Summary: A validated LC-MS/MS method was developed for the determination of Spirodiclofen residues in different aquatic toxic media. Fe2O3-Ag2O/TiO2 nanocomposites were found to be excellent photocatalysts for the removal of Spirodiclofen pesticide from water. The nanocomposites showed a half-life value of approximately 8 hours, indicating their high efficacy in decontaminating pesticide residues in aquatic media samples.
Article
Green & Sustainable Science & Technology
Pramod Bhatt, M. K. Sharma, M. D. Mukadam, Sher Singh Meena, S. M. Yusuf
Summary: We synthesized a highly crystalline sodium intercalated manganese hexacyanoferrate open framework structure using a co-precipitation method. The effect of sodium intercalation on structural properties, electrochemical performance, and magnetic ordering was studied. The compounds showed ferrimagnetic nature and exhibited suitable capacitance values for electrochemical capacitors.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Chemistry, Inorganic & Nuclear
Abdullah Aljaafari, Faheem Ahmed, Nagih M. Shaalan, Shalendra Kumar, Abdullah Alsulami
Summary: This work presents the deposition of titanium nitride (TiN) thin film and its application as a diffusion barrier for copper interconnect using the DC sputtering technique. The deposited film was analyzed using XRD, FESEM, and XPS techniques. The TiN film exhibited a face-centered cubic structure and uniform grain dispersion. The TiN film showed high thermal stability, low resistivity, and excellent performance as a diffusion barrier up to 700 degrees C. However, at higher annealing temperatures, the formation of Cu3Si and TiSi2 compounds was observed.
Article
Materials Science, Ceramics
Varsha C. Pujari, Pramod D. Mhase, Rohini M. Mahindrakar, Sher Singh Meena, Sanjay R. Kamble, Sunil M. Patange, Santosh S. Jadhav
Summary: Different Nd doping concentrations of Ba-Ca hexaferrites were synthesized using sol-gel auto-ignition method. The results showed that Nd doping modulated the magnetic behavior of the hexaferrites, resulting in moderate saturation magnetization and high coercivity values.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Nagih M. Shaalan, Shalendra Kumar, Faheem Ahmed, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: In this study, a new strategy for improving the electrochemical performance of laser-induced graphene (LIG) supercapacitors (SCs) was reported. The LIG was prepared using a CO2 laser system, with polyimide polymer as the source material. The combination of graphene and NiO particles through CO2 laser doping process significantly enhanced the capacitance of LIG. The results showed a multilayered and waved structure of LIG, with NiO fine particles distributed in the graphene layers.
Article
Materials Science, Multidisciplinary
Pramod Bhatt, Nilasha Maiti, M. D. Mukadam, Sher Singh Meena, A. Kumar, S. M. Yusuf
Summary: We investigate the cluster spin-glass behavior and magnetocaloric properties of potassium-ion-intercalated copper hexacyanoferrate open framework material. The structural properties are analyzed through x-ray and neutron diffraction measurements, revealing a pure single-nanocrystalline phase with face-centered cubic crystal structure. The presence of a low-spin state of FeIII and FeII is observed through Mossbauer spectroscopy, while magnetization measurements and ac susceptibility measurements confirm the ferromagnetic interaction and spin-glass behavior of the compounds, respectively. The magnetocaloric effect is found to be higher for one compound compared to the other.
Article
Materials Science, Multidisciplinary
S. M. Yusuf, A. Jain, A. K. Bera, S. S. Meena, D. K. Shukla, J. Strempfer
Summary: The present study investigates the time, temperature, and magnetic field dependence of the magnetic order in a Ca3Co2O6 single crystal using resonant magnetic scattering. The results indicate contributions from quadrupole (E2E2) and dipolar-quadrupolar (E1E2) transition processes, suggesting the presence of high-order moments in addition to the magnetic dipole moment.
Article
Materials Science, Multidisciplinary
Kavita Kumari, Akshay Kumar, Su-Jeong Park, Naveen Yadav, Manish Kumar, Shalendra Kumar, Seok-Hwan Huh, Jong-Woo Kim, Bon-Heun Koo
Summary: One-dimensional SmCo/Co magnetic nanocomposites with varying reaction times were prepared through magnetically-assisted chemical reduction method. The samples exhibited different phase compositions and magnetic properties. The nanocomposite SC5 showed the highest aspect ratio, smallest crystallite size, and highest lattice strain. The magnetic response of the samples was greatly influenced by the reaction time, with SC5 showing the highest saturation magnetization and effective magnetic anisotropy. Spin-orbit coupling played a crucial role in determining the magnetic anisotropy, which was highest in SC5. The enhanced magnetic properties of the nanocomposites were attributed to the high fraction of magnetic phases and coupling between multiple phases.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Chemistry, Multidisciplinary
Deepa Singh, Yang Hu, Sher Singh Meena, Rishikesh Vengarathody, Maximilian Fichtner, Prabeer Barpanda
Summary: This study explores the use of iron-based fluorphosphate as a cathode for zinc-ion batteries, which can reversibly intercalate zinc ions and has the advantage of low cost.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Ayushi G. Patel, Robert C. Pullar, Sher Singh Meena, Rajshree B. Jotania
Summary: This study investigates phase formation and the effect of gallium substitution on the properties of polycrystalline X-type hexagonal ferrites. The synthesized samples show good magnetic behavior and soft magnetic properties, while the increase in gallium substitution has some influence on the properties of the samples.
JOURNAL OF MATERIALS CHEMISTRY C
(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)
