Article
Biochemistry & Molecular Biology
Qing Lin, Fang Yang, Qian Zhang, Kaimin Su, Huiren Xu, Yun He, Jinpei Lin
Summary: In this study, A(y)B(1-y)C(x)Fe(2-x)O(4) (C=Ho,Gd,Al) ferrite powders were synthesized by the sol-gel combustion route. The X-ray diffraction results confirmed the compositions of single-phase cubic ferrites within the CoHoxFe2-xO4 range. The substitution of Ho3+ ions decreased the saturation magnetization of CoHoxFe2-xO4, while the coercivity initially increased and then decreased with the increase of the calcination temperature. The Mossbauer spectra indicated a ferrimagnetic behavior of CoHoxFe2-xO4 with two normal split Zeeman sextets. The magnetic hyperfine field decreased due to Ho3+ substitution, which led to a decrease in A-B super-exchange by the paramagnetic rare earth ions. The X-ray diffraction results also confirmed the compositions of single-phase cubic ferrites within the Mg0.5Zn0.5CxFe2-xO4 (C=Gd,Al) range. The variation in average crystalline size and lattice constant was related to the doping of gadolinium and aluminum ions. The saturation magnetization showed a significant change with increasing gadolinium and aluminum ions, and the coercivity increased. The AlMg0.5Zn0.5FeO4 ferrite exhibited ferrimagnetic and paramagnetic character with the replacement of Gd3+ ions and paramagnetic character with the replacement of Al3+ ions. The isomer shift values indicated the presence of Fe3+ ions.
Article
Chemistry, Multidisciplinary
M. A. Islam, A. K. M. Akther Hossain
Summary: This research work focuses on the magnetic properties, nature of the magnetic phase transition, magnetocaloric effect, and critical scaling of magnetization of various Co1-xCrxFe2O4 (x = 0, 0.125, 0.25, 0.375, and 0.5) samples. The results show that the magnetocaloric effect is reliable for samples with x = 0.125, 0.250, and 0.375.
Article
Materials Science, Ceramics
Marwa M. Hussein, Samia A. Saafan, H. F. Abosheiasha, Di Zhou, M. V. Silibin, S. V. Trukhanov, A. V. Trukhanov, E. L. Trukhanova, K. A. Astapovich, Hesham M. H. Zakaly, Moustafa A. Darwish
Summary: Meticulous synthesis of Co1-xNixFe2O4 nanoparticles was achieved via the chemical citrate precursor technique. X-ray diffraction and magnetic characterizations revealed the effects of nickel content on the structural integrity and magnetic properties, highlighting the role of ion distribution.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
M. Ounacer, B. Rabi, A. Essoumhi, M. Sajieddine, B. F. O. Costa, M. Emo, A. Razouk, M. Sahlaoui
Summary: The report investigates the structural and magnetic properties of Al3+ substituted cobalt ferrite nanoparticles. It demonstrates that increasing Al content significantly influences the lattice parameters and magnetic properties, leading to a decrease in grain size.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Applied
Vitaliy Bilovol, Marcin Sikora, Sona Lisnikova, Jan Zukrowski, Katarzyna Berent, Marta Gajewska
Summary: Temperature is a crucial factor in the synthesis of nanoparticles, and it has a significant impact on the atomic arrangement in the lattice. In the system of magnetically hard CoFe2O4 spinel ferrite, the distribution of cations directly affects the magnetic properties of the sample. Through various tests, the behavior of co-precipitation synthesis products at different sintering temperatures was studied, revealing that the lower the sintering temperature, the lower the inversion degree and the more Co ions tend to occupy the tetrahedral sites.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Yue Yuan, Shicheng Wei, Yi Liang, Bo Wang, Yujiang Wang, Wei Xin, Xinlei Wang, Yu Zhang
Summary: The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Crystallography
Hector A. Chinchay-Espino, Gina M. Montes-Albino, Carlex M. Morales-Cruz, Segundo E. Dobbertin-Sanchez, Segundo Rojas-Flores
Summary: The effect of Co substitution on the structural and magnetic properties of BiFeO3 was studied, and Co-BiFeO3 nanopowders were successfully synthesized via the sol-gel method, exhibiting ferromagnetic properties at 15% Co doping.
Article
Physics, Multidisciplinary
I Ergin, K. Icin, H. Gungunes, B. Ozcelik
Summary: This study investigates the impact of Cu2+ doping on the morphology, structure, optics, magnetism, and Mossbauer features of Co1-xCuxFe2O4 (x = 0.0-1.0) nanoparticles fabricated by the sol-gel auto-combustion reaction method. The XRD patterns reveal primarily pure phase Co-spinel structures. The crystal sizes range from 28.77 to 36.25 nm. FT-IR spectroscopy identifies fundamental vibrational bands at 426 and 602 cm(-1) wavelengths for the nanoparticles. The substitution of Cu2+ ions for Co2+ ions occurs mainly at the A site, but for x = 0.75, some Cu2+ ions are present at both A and B sites. The magnetic measurements show that Cu2+ substitution significantly affects magnetic quantities such as coercivity field (Hc), remnant (Mr), and saturation magnetization (Ms). The magnetic hysteresis curves exhibit well-known S-shaped features for all nanoparticles, with Ms values ranging from 51.5 to 64.4 emu g(-1), Mr values of 31-36 emu g(-1), and H (c ) values of 429.5-1447.8 Oe.
Article
Chemistry, Physical
Thomas Dippong, Mihaela Diana Lazar, Iosif Grigore Deac, Petru Palade, Ioan Petean, Gheorghe Borodi, Oana Cadar
Summary: This study investigates the effect of Mn2+ substitution for Co2+ in CoFe2O4 embedded in a SiO2 matrix on the structural, surface, morphological, and magnetic properties. With an increase in Mn content, particle size increases and magnetic properties change accordingly. The mesoporous structure facilitates the release of fine nanoparticles in aqueous environment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Saroj P. Sahare, Atul V. Wankhade, Sangesh P. Zodape
Summary: Cobalt-nickel ferrite nanoparticles were synthesized by a hydrothermal method assisted by malonic acid. Structural and morphological studies showed single-phase spinel ferrites with monodispersed nanoparticles. The synthesized cobalt-nickel ferrite samples exhibited promising properties for high-density recording media.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Thomas Dippong, Erika Andrea Levei, Cristian Leostean, Oana Cadar
Summary: In this study, (Co0.4Mn0.6Fe2O4)(delta) (SiO2)(100-delta) nanocomposites were synthesized and their structure and magnetic properties were controlled by varying annealing temperatures and ferrite content. The results showed that the crystallite size increased with annealing temperature and ferrite content, with SiO2 exhibiting diamagnetic behavior and Co0.4Mn0.6Fe2O4 showing superparamagnetic-like behavior in the SiO2 matrix.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Thomas Dippong, Oana Cadar, Erika Andrea Levei
Summary: A sol-gel route followed by thermal treatment was used to produce NiFe2O4 doped with transition metal ions (Zn2+, Mn2+, Co2+). The structural, morphological, and magnetic properties of the doped NiFe2O4 were compared with those of the virgin NiFe2O4. The results showed that the doping ion, annealing temperature, and particle size had significant effects on the crystallite sizes, lattice parameters, and magnetic properties of the doped ferrites. The obtained nanocomposites with high saturation magnetization values were found to be suitable for a wide range of applications in the field of sensors development and construction.
Article
Biochemistry & Molecular Biology
Rocio Redon, Miriam D. Aviles-Avila, Leopoldo Ruiz-Huerta, Herlinda Montiel, Alex Elias-Zuniga, Lucy-Caterine Daza-Gomez, Oscar Martinez-Romero
Summary: By utilizing additive manufacturing and nanotechnology, magnetic cobalt ferrite and barium ferrite nanoparticles were incorporated into commercial resins and successfully transferred their magnetic properties to the final 3D-printed pieces through photopolymerization.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Nurjahirah Janudin, Noor Azilah Mohd Kasim, Victor Feizal Knight, Mohd Nor Faiz Norrrahim, Mas Amira Idayu Abdul Razak, Norhana Abdul Halim, Siti Aminah Mohd Noor, Keat Khim Ong, Mohd Hanif Yaacob, Muhammad Zamharir Ahmad, Wan Md Zin Wan Yunus
Summary: Chlorine gas is widely used in industries, but it has a strong odor and can cause health issues. Efficiently monitoring chlorine gas is important to prevent undesirable incidents. This study explores the potential of nickel ferrite nanoparticles as a sensing material for chlorine gas detection. The results show that nickel ferrite nanoparticles loaded onto nanocellulose substrate demonstrate good stability and excellent gas sensing properties.
Article
Crystallography
Mohamed S. A. Darwish
Summary: This study fabricated a series of photocatalysts based on magnetic ferrite nanostructures using a two-step co-precipitation technique. The fabricated magnetic photocatalysts were characterized using various methods. The results showed that MNPs exhibited outstanding performance as magnetic photocatalysts for the water-splitting process.
Article
Chemistry, Multidisciplinary
Thomas Dippong, Erika Andrea Levei, Iosif Grigore Deac, Mihaela Diana Lazar, Oana Cadar
Summary: (Co0.4Zn0.4Ni0.2Fe2O4)(alpha)(SiO2)((100-alpha)) samples with different proportions of Co0.4Zn0.4Ni0.2Fe2O4 nanoparticles embedded in SiO2 were synthesized and characterized. The samples were analyzed using various techniques including thermal analysis, Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, inductively coupled plasma optical emission spectrometry, and magnetic measurements. The results showed the formation of poorly crystalline Co-Zn-Ni ferrite at low annealing temperatures and highly crystalline Co-Zn-Ni ferrite along with traces of Fe2SiO4 and SiO2 at higher annealing temperatures. The magnetic properties improved with the increase in ferrite content and annealing temperature.
Article
Chemistry, Physical
Thomas Dippong, Erika Andrea Levei, Oana Cadar
Summary: The structure, morphology, and magnetic properties of ZnxCo0.8-xNi0.4Fe2O4@SiO2 (x = 0.1; 0.3; 0.5; 0.7) nanocomposites were investigated. X-ray diffraction confirmed the formation of ferrites and SiO2 matrix at different annealing temperatures. The average crystallite size varied with annealing temperature and Zn2+ content. Scanning electron microscopy revealed large aggregates of irregular shapes, while transmission electron microscopy showed the presence of small and large spherical particles. The magnetic properties of the nanocomposites were dependent on the particle size and Co2+ or Zn2+ content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Agronomy
Mirela Miclean, Erika Andrea Levei, Claudiu Tanaselia, Oana Cadar
Summary: Rare earth elements (REEs) and other elements in vegetables and soils near tailings management facilities in NW Romania were measured. Soil-to-plant transfer and health risks of vegetable consumption were assessed. The concentrations of REEs and other elements varied widely, with LREEs being more abundant. The study found no significant health risks from consuming vegetables with REEs, as the daily intake was below acceptable levels.
Article
Food Science & Technology
Lucian Dordai, Dorina Simedru, Oana Cadar, Anca Becze
Summary: Raw bars are popular for their nutrient-dense ingredients and lack of additives and preservatives. However, the impact of simulated gastrointestinal digestion on their nutrient content has not been extensively studied. This study evaluated the effects of simulated digestion on the nutrient content of four different raw bar recipes, showing significant nutrient loss depending on the recipe.
Article
Biochemistry & Molecular Biology
Thomas Dippong, Erika Andrea Levei, Ioan Petean, Iosif Grigore Deac, Raluca Anca Mereu, Oana Cadar
Summary: The impact of doping with different cations on the properties of CoFe2O4 nanoparticles synthesized via sol-gel method and calcined at different temperatures was investigated. The study found that doping cations affect the structural, thermal, kinetics, morphological, surface, and magnetic properties of the nanoparticles. Calcination at low temperatures results in low crystallinity while high temperatures lead to well-crystallized ferrites together with crystalline phases of the silica matrix. The structural and magnetic parameters of the nanoparticles also depend on the doping ion and calcination temperature.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Thomas Dippong, Oana Cadar, Iosif Grigore Deac, Lucian Barbu Tudoran, Erika Andrea Levei
Summary: This study investigates the effect of Ni2+ substitution by Co2+ on the structure, morphology, and magnetic properties of Co alpha Ni0.9-alpha Zn0.1Fe2O4 nanoparticles calcined at different temperatures. The results show that the presence of Co2+ and higher calcination temperatures lead to increased crystallite size, decreased porosity, increased magnetization, coercivity, and magnetocrystalline anisotropy. The nanoparticles exhibit superparamagnetic-like behavior at 400°C and ferrimagnetic-like behavior at higher calcination temperatures, making them potential candidates for various technical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Anamaria Iulia Torok, Ana Moldovan, Lacrimioara Senila, Eniko Kovacs, Maria-Alexandra Resz, Marin Senila, Oana Cadar, Claudiu Tanaselia, Erika Andrea Levei
Summary: This study analyzed the photosynthetic pigments, protein, macro and microelements concentrations, and fatty acids composition of Salvinia natans after exposure to Hoagland nutrient solution with different concentrations of Li. The Li content in Salvinia natans increased exponentially with the Li concentration in the solution. Exposure to Li did not significantly affect the content of Na, Mg, K, Cu, and Zn, but enhanced the absorption of Ba, Cr, Mn, Ni, and Mo in Salvinia natans. The most abundant fatty acids in oils extracted from Salvinia natans were C16:0, C18:3(n6), C18:2(n6), and C18:3(n3). The results indicate that Salvinia natans exposed to low Li concentrations may be a good source of minerals, omega-6 and omega-3 fatty acids.
Article
Environmental Sciences
Edina Szekeres, Andreea Baricz, Adorjan Cristea, Erika Andrea Levei, Zamfira Stupar, Traian Brad, Marius Kenesz, Oana Teodora Moldovan, Horia Leonard Banciu
Summary: This study analyzed karst springs in Romania to investigate the core microbiome and the effects of contamination on these communities. The results revealed a taxonomically stable bacterial community dominated by Pseudomonadota, Bacteroidota, and Actinomycetota. The study also identified faecal bacteria and pathogens in more than half of the springs, along with the presence of antibiotic resistance genes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Daniela Alexandra Scurtu, Leontin David, Erika Andrea Levei, Dorina Simedru, Xenia Filip, Cecilia Roman, Oana Cadar
Summary: The expansion of the construction industry has led to a demand for more construction materials. To reduce environmental impact and improve quality, alternative raw materials have been researched. This study investigated the effects of adding 1% vine shoot waste (VSW) and 1% superplasticizers on cement paste. The results showed that the addition of VSW and superplasticizers did not impact the performance of the cement paste, but it did reduce the water-cement ratio and improved the structural and mechanical properties.
Article
Materials Science, Multidisciplinary
Liliana Maria Nicula, Daniela Lucia Manea, Dorina Simedru, Oana Cadar, Ioan Ardelean, Mihai Liviu Dragomir
Summary: This study aims to demonstrate the advantages of using GGBS and ACBFS in infrastructure concrete, showing improved tensile strength and durability. The results indicate that concrete containing GGBS and ACBFS meets high-quality standards and can be recommended as ecological road concrete. The study proves that a high-class road concrete with a minimum tensile strength of 5 MPa at 28 days can be achieved using GGBS and ACBFS.
Article
Food Science & Technology
Thomas Dippong, Oana Cadar, Melinda Haydee Kovacs, Monica Dan, Lacrimioara Senila
Summary: This study conducted a physicochemical analysis of different types of tea (leaves, flowers, and instant) that had been dried and finely ground. The thermal decomposition behavior of tea components showed three stages of decomposition at different temperatures. The study identified 66 volatile compounds in the tea samples, classified into eight classes, with nine odor classes. Flower and leaf tea samples were found to be a good dietary source of polyphenolic compounds and essential elements, while instant tea samples had low levels of polyphenols and major elements. The physicochemical analysis demonstrated that flower and leaf teas have higher quality properties compared to instant tea.
Article
Chemistry, Inorganic & Nuclear
Roman Atanasov, Ecaterina Brinza, Rares Bortnic, Razvan Hirian, Gabriela Souca, Lucian Barbu-Tudoran, Iosif Grigore Deac
Summary: This study reports the synthesis and investigation of La0.7Ba0.3-xCaxMnO3 (x = 0, 0.15, 0.2 and 0.25) compounds for magnetic refrigeration applications. Bulk and nano-sized samples were compared in terms of their structural and magnetic properties. The bulk materials were synthesized through solid-state reactions, while the nano-sized particles were prepared using the sol-gel method. The samples were characterized using various techniques, and their magnetocaloric behaviors were analyzed. The results indicate that the combination of bulk and nanocrystalline materials can contribute to the improvement of magnetocaloric materials.
Article
Chemistry, Physical
Liliana Maria Nicula, Daniela Lucia Manea, Dorina Simedru, Oana Cadar, Mihai Liviu Dragomir, Ioan Ardelean, Ofelia Corbu
Summary: Incorporating blast furnace slag into paving concrete can effectively eliminate by-products from pig iron production. Studies have shown that granulated and ground blast furnace slag (GGBS) and air-cooled blast furnace slag (ACBFS) can be used as substitutes for cement and natural aggregates in concrete composition. However, the mechanical properties of concrete with high amounts of blast furnace slag depend on the interaction between the slag, cement, and water. This study focuses on finding the optimal proportions of GGBS and ACBFS that result in similar performance to control concrete after 90 days of curing.
Article
Medicine, General & Internal
Codruta Eliza Ille, Elena-Alina Moaca, Maria Suciu, Lucian Barbu-Tudoran, Meda-Lavinia Negrutiu, Anca Jivanescu
Summary: Three CAD/CAM materials, Cerasmart (CS), Straumann Nice (SN), and Tetric CAD (TC), were assessed for biocompatibility and sustainability on human fibroblasts and keratinocytes cells. After being exposed to an acidic environment, CS and SN induced decreased mitochondrial activity and plasma membrane damage in fibroblasts, while TC showed necrotic effects. Oxidative stress was not observed in the cells treated with these materials. SEM analysis revealed that fibroblasts adhered well to all tested CAD/CAM materials, with CS and SN exhibiting weaker adhesion compared to TC. Overall, these materials are biocompatible and support cell attachment and dispersion.
MEDICINA-LITHUANIA
(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)
