Article
Materials Science, Multidisciplinary
P. Maltoni, T. Sarkar, G. Barucca, G. Varvaro, D. Peddis, R. Mathieu
Summary: The role of synthesis approach in developing SrFe12O19/CoFe2O4 (SFO/CFO) NCs was investigated, focusing on tuning the magnetic features of the softer phase (CFO) by introducing Zn2+ in the spinel structure. Various techniques were used to clarify the relationship between morphology, size, and magnetic properties, showing the feasibility of obtaining successful exchange-coupled systems. Optimizing the intrinsic magnetic properties of CFO was highlighted as crucial for tuning the extrinsic ones of the NCs, with the enhancement of remanent magnetization being a key factor in improving magnetic performance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
M. A. Almessiere, Y. Slimani, H. Attia, S. I. M. Sheikh, Ali Sadaqat, M. G. Vakhitov, D. S. Klygach, M. Sertkol, A. Baykal, A. V. Trukhanov
Summary: The study investigated the magnetization properties and exchange coupling of hard/soft nanocomposites by varying the ratios of different elements. The sample with the highest Zn content and the same Ni and Cu contents achieved higher saturation magnetization values at 10 K and 300 K. The waveguide approach was employed to study the electrodynamic properties of the samples.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Antonio B. Mapossa, Washington Mhike, Jose L. Adalima, Shepherd Tichapondwa
Summary: Heterogeneous photocatalysis using titanium dioxide and zinc oxide has gained popularity due to their high activity and low cost, but commercial application is limited by technical constraints. Coupling different semiconductor materials to develop visible-light-active and easily recoverable nanocomposites is an effective strategy to overcome limitations.
Article
Materials Science, Ceramics
K. Khan, Hur Abbas, K. Nadeem
Summary: Soft/hard nanocomposites (NCs) with different hard ferrite ratios (x = 0, 25, 50, 75, and 100) were synthesized using in-situ auto-combustion sol-gel method. The XRD patterns confirmed the presence of hexaferrite and spinel ferrite phases without impurities. FTIR and Raman spectra confirmed the fabrication of desired material without impurities. The M-H loops showed strong interphase exchange-coupling among hard-soft ferrite phases, and the impedance analysis indicated the potential use of these NCs in various technological applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Paramdeep Kaur, Sneha Singh, Renu, Jyoti, Vinod Kumar, K. B. Tikoo, Anupama Kaushik, Sonal Singhal
Summary: This study focused on the synthesis of eco-friendly and magnetic retrievable catalysts using reduced graphene oxide and multiwalled carbon nanotubes as support for strontium hexaferrite. The composites showed improved catalytic activity for the oxidative degradation of organic pollutants due to the synergistic interactions between different components, providing larger specific surface areas and more catalytically active sites. Additionally, the synthesized composites exhibited excellent recyclability, making them promising candidates for industrial catalysts.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
C. Ekpunobi Arinzechukwu, Samson O. Aisida, Ada Agbogu, Ishaq Ahmad, Fabian I. Ezema
Summary: In this study, a bioinspired procedure was used to maximize the properties of nickel-zinc ferrite nanoparticles (NiZnFNPs) with polyethylene glycol as a capping agent. The addition of PEG improved the spherical morphology of NiZnFNPs and made it suitable for moderate hyperthermia applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
Munirah A. Almessiere, Yassine Slimani, Norah A. Algarou, Maksim G. Vakhitov, Ayse Demir Korkmaz, Abdulhadi Baykal, Denis S. Klygach, Tatiana I. Zubar, Anwar Ul-Hamid, Sergei V. Trukhanov, Alex V. Trukhanov
Summary: SrInxFe12-xO4/Ni0.5Zn0.5Fe2O4 (0.00 <= x <= 0.04) nanocomposites (SIFO/NZFO NCs) were synthesized using a one-pot sol-gel auto-combustion technique. The impact of indium doping on the magnetic properties of the nano-composites was investigated, and it was found that the saturation magnetization, remanence magnetization, and coercive field showed a non-monotonic dependence on the indium content.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
M. G. Moustafa, H. H. Hamdeh, M. A. Sebak, M. H. Mahmoud
Summary: Ball milling can improve the physical properties of the synthesized Mn-Zn ferrites, such as crystalline size and microstrain. Additionally, it enhances the magnetic order and changes the chemical order. As a result, these Mn-Zn ferrites have great potential for applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Muhammad Jamshaid, Aziz Ur Rehman, Ome Parkash Kumar, Shahid Iqbal, Muhammad Altaf Nazir, Aqsa Anum, Hasan M. Khan
Summary: The structure, dielectric response, and photocatalytic properties of Dy-Ni substituted calcium-lead hexaferrite were investigated. The doped materials showed potential for use in optical devices and dye degradation.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Amit Joshi, R. C. Srivastava, Reena Dhyani, Chandra Shekhar Joshi
Summary: The properties of nanocomposites of yttrium-doped cobalt ferrite and polythiophene were investigated. Yttrium-doped cobalt ferrite nanoparticles were synthesized and their nanocomposites with polythiophene were prepared. Characterization techniques such as XRD, FTIR, Raman spectroscopy, FESEM, VSM, and impedance analyzer were used to analyze the nanocomposites. The incorporation of polythiophene in ferrite resulted in enhanced dielectric behavior and lower magnetization.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
V. Balasubramani, V. Mowlika, A. Sivakumar, Njod Al Sdran, F. Maiz, Mohd Shkir
Summary: Research on tuning the magnetic properties of divalent ferrite materials has its own significance due to their wide applications in modern electronic and magnetic devices. This study focuses on the sono-chemical synthesis and characterization of pure and Sn doped CoFe2O4 nanoparticles (NPs). The obtained results reveal a stable cubic crystallographic structure, stable hard ferromagnetic state, and higher coercivity in Sn doped CoFe2O4 NPs compared to pure CoFe2O4. These findings suggest the potential application of Sn doped CoFe2O4 NPs in magnetic data storage.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Environmental Sciences
M. Abdullah, G. Murtaza, Muhammad Azhar Khan
Summary: CuFe2O4 nanoparticles were synthesized via the sol-gel auto combustion method and hybridized with layer-structured graphene. The nanoparticles exhibited a crystallite size up to 53 nm, with variations depending on the copper ferrite content. Fourier transform infrared spectroscopy confirmed the presence of carboxyl stretching, aromatic stretching, and Fe-O bonds. Scanning electron microscopy images revealed the surface morphology of the nanoparticles and nanocomposites, while vibrating sample magnetometer results showed their magnetic properties. Energy dispersive X-ray spectroscopy and Brunauer-Emmett-Teller surface area analysis confirmed the composition and surface characteristics of the materials. The composite demonstrated excellent adsorption capacities for As(III) and As(V) due to the synergistic effect of CuFe2O4 and graphene.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Materials Science, Multidisciplinary
Adnan Sharif, Mujahid Mustaqeem, Tawfik A. Saleh, Aziz Ur Rehman, Muhammad Ahmad, Muhammad Farooq Warsi
Summary: This study explores the incorporation of Mg0.5Zn0.5Fe2O4 nanoparticles into a PVA network using ultrasound-assisted liquid-phase method to address dispersion and stabilization issues. TEM and FTIR confirmed the encirclement of PVA chains around nanoparticles, and XRD demonstrated a single-phase cubic crystalline structure in the composites.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
H. F. Abosheiasha, Diaa-Eldin A. Mansour, M. A. Darwish, S. T. Assar
Summary: Until recently, multifunctional epoxy nanocomposites (MENCs) have attracted the attention of researchers due to their tunable properties. This study focuses on epoxy/Li0.5Al0.35Fe2.15O4/Al2O3 nanocomposites with varying Al2O3 content. The samples were characterized and it was found that increasing the Al2O3 nanofillers enhances thermal conductivity but decreases thermal stability. The samples also exhibit soft ferrimagnetic behavior. The study explains the interesting results of decreasing electrical conductivity and dielectric properties for the composite samples based on a dual interface nanolayer model.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Prabhakaran Thandapani, Radhamanohar Aepuru, Fanny Beron, Mangalaraja Ramalinga Viswanathan, Kokkarachedu Varaprasad, Fabio Luis Zabotto, Jose A. Jimenez, Juliano C. Denardin
Summary: In recent days, there is increasing interest in the development of multicaloric materials for cooling application, and multiferroic materials are being considered as suitable alternatives to conventional refrigerants. A study was conducted on the fabrication of poly(methyl methacrylate)/poly(vinylidenefluoride-co-hexafluoropropylene) (PMMA/PVDF-HFP) blend and PMMA/PVDF-HFP/Zn0.5Cu0.5Fe2O4 flexible multiferroic nanocomposite films. The results showed that PMMA/PVDF-HFP/Zn0.5Cu0.5Fe2O4 nanocomposite films exhibited both magnetocaloric and magnetoelectric effects.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Ceramics
Pablo Arevalo-Cid, Josefa Isasi, Amador C. Caballero, Fatima Martin-Hernandez, Ramon Gonzalez-Rubio
Summary: Chitosan-coated Fe3O4 nanoparticles were prepared and the coating was modified by varying the volume of glutaraldehyde. The presence of chitosan improved the stability and dispersibility of the samples, but could not completely prevent aggregation.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2022)
Article
Geochemistry & Geophysics
M. Rivero-Montero, M. Gomez-Paccard, D. Kondopoulou, E. Tema, F. J. Pavon-Carrasco, E. Aidona, S. A. Campuzano, A. Molina-Cardin, M. L. Osete, A. Palencia-Ortas, F. Martin-Hernandez, F. Rubat-Borel, M. Venturino
Summary: This study presents new archaeointensity data from Greece and Italy, revealing a high-intensity peak in Greece between 1070 and 1040 BCE associated with the Levantine Iron Age geomagnetic Anomaly (LIAA). The research suggests that the source of the LIAA is located in the Levantine region and extends to Europe around 500 BCE, indicating an Earth's outer core origin for these intensity features.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geography, Physical
Serena D'Arcangelo, Fatima Martin-Hernandez, Josep M. Pares
Summary: The study presents new rock magnetic results from a cave in the Sierra de Atapuerca, analyzing the distribution and concentration changes of magnetic minerals in cave sediments to reconstruct the paleoenvironmental conditions of the archaeological site. Through rock magnetic analyses, the study aims to identify magnetic proxies for a better understanding of the environmental conditions at the time of early human migration into Europe.
QUATERNARY INTERNATIONAL
(2021)
Article
Engineering, Environmental
Alberto Adan-Mas, Lorena Alcaraz, Pablo Arevalo-Cid, Felix. A. Lopez-Gomez, Fatima Montemor
Summary: The electrochemical energy storage performance of activated carbons derived from coffee biowastes were evaluated, showing promising potential for supercapacitor applications.
Article
Geochemistry & Geophysics
Alicia Palencia-Ortas, Alberto Molina-Cardin, Maria Luisa Osete, Miriam Gomez-Paccard, Fatima Martin-Hernandez, Annick Chauvin, Pierrick Roperch
Summary: In directional archaeomagnetic studies, anisotropy of thermoremanent magnetization in combustion structures can lead to disturbances in archaeomagnetic directions, which if not properly corrected can significantly affect the obtained ages in archaeomagnetic dating.
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2021)
Article
Geochemistry & Geophysics
M. Rivero-Montero, M. Gomez-Paccard, F. J. Pavon-Carrasco, M. A. Cau-Ontiveros, L. Fantuzzi, F. Martin-Hernandez, A. Palencia-Ortas, E. Aidona, E. Tema, D. Kondopoulou, C. Mas-Florit, J. Ramon-Torres
Summary: Recent archeointensity data from the Mediterranean region provide insights into geomagnetic field intensity changes in Europe over the past two millennia, identifying relative intensity maxima in the 14th to 15th centuries. Two new paleosecular variation curves suggest intensity maxima occur approximately every 300 years, with a mean lag-time of about 100 years between Western and Eastern Europe.
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2021)
Article
Geochemistry & Geophysics
R. Bonilla-Alba, M. Gomez-Paccard, F. J. Pavon-Carrasco, J. del Rio, E. Beamud, V Martinez-Ferreras, J. M. Gurt-Esparraguera, E. Arino-Gil, A. Palencia-Ortas, F. Martin-Hernandez, A. Chauvin, M. L. Osete
Summary: Recent paleomagnetic studies have revealed significant short-term fluctuations in magnetic field intensity during the first millennium BCE, particularly a decrease in Central Asia after the Levantine Iron Age Anomaly. The new archeointensities analysis confirms the presence of this feature at a continental scale, with significant impacts of non-dipolar sources on the intensity decrease.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Chemistry, Physical
C. Ferrer, J. Isasi, P. Arevalo, M. Fernandez-Ramos, M. Rapp, M. Alcolea, J. F. Marco, F. Martin-Hernandez
Summary: This study investigated the optimal synthesis conditions of nickel ferrite samples with small particle size and evaluated their properties using various characterization techniques. The samples synthesized with urea exhibited square particles, while those prepared with potassium hydroxide showed spherical particles. The sample synthesized with urea and functionalized with AEPDMS demonstrated the best adsorption capacity for Cu2+ ions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Goutam Brahmachari, Bhagirath Mandal, Mauricio Alcolea Palafox, Swapan Kumar Chandra, Carlos Ferrer, Pablo Arevalo, Indrajit Karmakar
Summary: A new naturally-occurring nor-triterpenoid compound (pterocaronol) has been isolated from the barks of Peltophorum pterocarpum, and its detailed analysis and theoretical studies have been performed. The compound's crystal structure, molecular structure, vibrational spectra, and molecular docking interactions have been investigated.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
P. Arevalo-Cid, M. F. Vaz, M. F. Montemor
Summary: Highly porous iron-nickel foams were prepared by a dynamic hydrogen bubble template electrodeposition method and showed excellent electrochemical stability and mechanical properties. The foam structure and morphology were affected by the Ni content, with higher Ni content resulting in better mechanical performance. This innovative technique enables the design of iron foams with desired properties for industrial applications.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Multidisciplinary
Serena D'Arcangelo, Fatima Martin-Hernandez, Josep M. Pares
Summary: The cave system in Sierra de Atapuerca is crucial for understanding early human occupation in Europe. Gran Dolina cave, in particular, yielded a new hominin species called Homo antecessor. Through rockmagnetic investigation, we identified various magnetic iron oxides in the sediments, which helps in reconstructing the paleoenvironment and understanding the formation conditions of the archaeological site.
APPLIED SCIENCES-BASEL
(2023)
Review
Chemistry, Physical
P. Arevalo-Cid, P. Dias, A. Mendes, J. Azevedo
Summary: This review provides a comprehensive introduction to redox flow batteries and critically evaluates the state-of-the-art progress, covering individual components, economic analysis, and characterization techniques, showcasing their potential and advantages as a leading stationary energy storage technology.
SUSTAINABLE ENERGY & FUELS
(2021)
Review
Environmental Sciences
Eric C. Ferre, Ilya Kupenko, Fatima Martin-Hernandez, Dhananjay Ravat, Carmen Sanchez-Valle
Summary: Recent research has revealed the presence of magnetic materials in the mantle, particularly in the uppermost part, and experiments suggest that hematite and its polymorphs may have magnetic remanence. Analysis of aeromagnetic data confirms the existence of a magnetized layer below the crust-mantle boundary in various tectonic settings.
NATURE REVIEWS EARTH & ENVIRONMENT
(2021)
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)