Article
Materials Science, Ceramics
Jingang Guo, Hui Zhang, Yule Li, Shengan Yang, Junfeng Li, Qingming Chen
Summary: The effects of different substitution elements on the structure, electrical transport properties, and magnetic properties of La0.64RE0.06Ca0.3MnO3 polycrystalline ceramics were analyzed. The results showed that as the ionic radius of the substitution elements decreases, the cell volume decreases, the grain size increases, the peak resistivity increases exponentially, the metal-insulator transition temperature decreases linearly, the temperature coefficient of resistance first decreases and then increases, and the magnetoresistance gradually increases.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
R. Pena-Garcia, Y. Guerra, S. Castro-Lopes, Y. M. Camejo, Joao M. Soares, A. Franco, E. Padron-Hernandez, M. Cabrera-Baez
Summary: This study analyzed the effects of Sr and Ni doping on the morphological, electronic, and magnetic properties of ZnO nanoparticles, revealing differences in particle shapes, lattice structure changes, and magnetic contributions.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Alexander Gordeev, Svetlana Kuznetsova, Ekaterina Lyutova, Olga Khalipova, Dmitriy Fedorishin, Lilia Selyunina, Alexandra Malchik
Summary: Cerium dioxide sols, widely used in various fields, can be prepared without separating the oxide from the solution. The stabilizer, PVA, plays a key role in forming weakly aggregated CeO2 nanoparticles. The prepared sol exhibits antioxidant properties and can form a calcium-phosphate layer.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Mehrnoush Nakhaei, Marcos A. L. Nobre, Davoud Sanavi Khoshnoud, Martin Bremholm, Hossein Ali Khonakdar
Summary: Crystalline and single-phase Y1-xScxFeO3 (x = 0, 0.5 & 1) nanoparticles were synthesized by sol-gel method. The nanocrystals had sizes ranging from 30 to 39 nm as determined by X-Ray Diffractometry (XRD). The morphology and surface characteristics of the samples were analyzed using Field Emission Scanning Electron Microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). The magnetic properties of the samples exhibited antiferromagnetic and paramagnetic behaviors, while the electrical properties showed polarization-electric loops, dielectric constant changes, and dielectric loss through frequency and temperature. The band gap energy of YFeO3 and ScFeO3 was calculated to be 2.97 and 3.07 eV, respectively, using diffuse reflectance spectroscopy analysis.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
S. S. Hosseininejad, M. H. Ehsani, S. Esmaeili
Summary: The structural and magnetic properties of La0.6-xYxSr0.4MnO3 (x = 0-0.3) manganite synthesized by the sol-gel method were systematically investigated. The structural properties were confirmed using XRD patterns and Rietveld refinement analysis, while the atomic percentage of the elements in the samples was confirmed through EDX analysis. Additionally, the surface morphology was examined through a FESEM analysis. The effect of yttrium substitution on the magnetic properties was also studied, calculating various parameters such as the Curie constant and Curie temperature using the Curie-Weiss law.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Yan Gao, Sheng'an Yang, Ji Ma, Hui Zhang, Yunrui Yang, Kaizhao Wang, Jin Hu, Qingming Chen
Summary: Nd-doped La0.72Ca0.28MnO3 ceramic materials were synthesized using the sol-gel method, showing excellent TCR and MR at low magnetic fields, which could be potentially utilized in magnetic sensors and bolometers.
Article
Engineering, Chemical
Agustin Forchetti Casarino, Santiago Andres Bortolato, Diana Alejandra Estenoz, Marisa Elisabet Sponton
Summary: The novel polybenzoxazine/polysilsesquioxane nanocomposites exhibit uniform and reproducible structural morphology, high thermal stability, and T-g value, synthesized by polysilsesquioxane and silane-based benzoxazine monomer. The study found that adjusting the experimental conditions of the sol-gel process for polysilsesquioxane can impact material characteristics, particularly the concentration of silanol units and selective condensation.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Ceramics
Ananthakrishnan Nitu, Ananthakrishnan Srinivasan
Summary: Magnetic interactions in sol-gel-derived bioactive magnetic glass-ceramics (MGCs) were studied using EPR, magnetic susceptibility, and magnetization techniques. The intensity and linewidth of resonance absorptions showed composition dependence. Dipolar interaction dominated in MGC samples with iron oxide content ≤ 4 wt.%, while a crossover to super-exchange interaction occurred in samples with higher iron oxide content. The magnetic behavior differed between MGC samples with iron oxide content ≤ 6 and ≥ 8 wt.%, with the latter exhibiting superparamagnetic behavior correlated with the percentage of magnetic phases present.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Huiming Ji, Lu Zhang, Rui Zhang
Summary: Multiferroic BiFeO3 particles with size of about 50 nm and good crystallinity were prepared via a simple sol-gel method and annealing. The VOCs sensing properties of BiFeO3 sensor were tested under both traditional thermal excitation and synergetic thermal-magnetic excitation, and the results showed improved performance under the latter condition. The effect of magnetic field on the sensor can be attributed to decreased defects on domain walls, excitation of gas molecules, and activation of surface-absorbed oxygen species.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Environmental Sciences
Devaraj Manoj, Lalitha Gnanasekaran, Saravanan Rajendran, A. A. Jalil, Mohammad Nahid Siddiqui, F. Gracia, Matias Soto-Moscoso
Summary: The subject of water contamination and its impact on society and humans has been a topic of discussion for several decades. Phenolic compounds are widely found in water sources and it is crucial to determine their toxicity in natural and drinking water due to their harmful effects on humans. This study focuses on the development of an effective electrochemical sensor using a mesoporous structure of Fe3O4-TiO2 decorated on a glassy carbon electrode to detect catechol. The resulting Fe3O4-TiO2 based nanocomposite exhibited a mesoporous structure with highly active magnetite nanoparticles, showing a significant increase in the electrochemical response compared to pure TiO2.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Mohit Sahni, Sabyasachi Mukhopadhyay, R. M. Mehra, Sunil Chauhan, Prakash Chandra Sati, Manish Kumar, Munendra Singh, Naresh Kumar
Summary: Nanocrystalline particles of BiFO3 co-doped with ytterbium and cobalt were successfully synthesized and characterized using various techniques such as XRD and Raman spectroscopy. The substitution of Yb3+ and Co2+ ions in BFO samples improved the magnetic and photocatalytic properties. UV-Vis absorption spectroscopy revealed that all synthesized nanoparticles absorb light in the entire visible light wavelength range.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Physical
Shikha Sharma, Sumit Singh, Ujwal Manhas, Irfan Qadir, Amit Kumar Atri, Devinder Singh
Summary: Wastewater treatment is crucial due to its harmful effects on nature and living creatures. Dyes, especially organic pollutants, pose serious risks to human health and the environment in wastewater. This study focuses on removing these colored effluents from wastewater, both individually and in mixtures. Nano photocatalysts La1-xNaxFeO3 and their Cu composites were synthesized and characterized for their structural, morphological, optical, and magnetic properties. The Cu nano composites exhibited excellent photocatalytic activity, attributed to their low band gap energies. The stability and reusability of the most active photocatalyst, LaFeO3@Cu, were demonstrated. Additionally, the study extended its scope to the degradation of other organic dye contaminants using the same catalyst. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Andrius Pakalnis, Gediminas Niaura, Rimantas Ramanauskas, Dmitry Karpinsky, Guillaume Rogez, Marc Lenertz, Jerome Robert, Pierre Rabu, Shih-Wen Chen, Thomas Chung-Kuang Yang, Ramunas Skaudz, Aivaras Kareiva
Summary: Novel metastable hexagonal Lu(1-x)ScxFeO3 compounds were prepared and characterized. The phase composition was found to vary with the Sc content, and the reversible polar to nonpolar phase transition temperature decreased with increasing Sc content. The magnetization measurements showed non-zero room temperature magnetization and spin reorientation transitions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xinhai Zhang, Shouhua Zhang, Qiuling Chen
Summary: Transition metal ion-doped PbI2 is a strongly anisotropic material with potential applications in magneto-optical and nonlinear devices. By adjusting the doping concentration, the color, optical properties, and magnetic properties of the glass can be effectively modified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Mohamed Achraf Bouabdellah, Itidel Belkadhi, Lassaad Ben Hammouda, Gwendoline Lafaye, Francisco Medina Cabello, Zouhaier Ksibi
Summary: W-La/CexZr1-xO2 catalysts with a Ce/Zr molar ratio of 1 exhibit the highest catalytic performance in the catalytic wet air oxidation of phenol. Catalysts prepared by precipitation or hydrothermal method show the best mineralization and Total Organic Carbon removal efficiency.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
D. Piotrowska, I. Szczygiel
Summary: Phase equilibria and primary crystallization fields were established in the ErPO4-KPO3-Er(PO3)(3) partial system. Two polythermal binary cross-sections and three invariant points were determined, with the alloy crystallization ending in a ternary eutectic. The studies were conducted using thermoanalytical methods and powder X-ray diffraction analysis.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
B. Pilarek, M. Ptak, D. Stefanska, A. Watras, P. Peksa, A. Sieradzki, I Szczygiela, J. Hanuza
Summary: The Ca4Nb2O9-xNd2O3 (where x = 0.1-1.0) pseudobinary samples were synthesized by the high-temperature solid state method. The optical properties of Nd3+ ions in this oxide system were studied, and a structural phase transition dependent on the Nd2O3 oxide content was observed. Spectroscopic studies revealed a structural phase transition occurring at x = 0.5, leading to the transformation of the initial limited solid solution into the diphasic form of Ca-2 NdNbO6 and Nd2O3.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Medicinal
Urszula K. Komarnicka, Alessandro Niorettini, Sandra Koziel, Barbara Pucelik, Agata Barzowska, Daria Wojtala, Aleksandra Ziolkowska, Monika Lesiow, Agnieszka Kyziol, Stefano Caramori, Marina Porchia, Alina Bienko
Summary: In this study, two novel phosphine ligands and their corresponding metal complexes were synthesized and characterized. The copper(I) complexes were found to be highly unstable, while the ruthenium(II) and iridium(III) complexes showed promising cytotoxicity towards cancer cells. Further analysis revealed that these metal complexes effectively accumulated inside cancer cells, inducing apoptosis and altering the cell cycle. Additionally, the complexes exhibited low genotoxicity towards DNA and were able to generate reactive oxygen species. Furthermore, efficient anticancer action was demonstrated on multicellular tumor spheroids.
Article
Chemistry, Physical
Adrian Patej, Jerzy Hanuza, Maciej Ptak, Aleksandra Pelczarska, Irena Szczygiel, Rafal J. Wiglusz, Adam Watras
Summary: This study investigates the influence of co-doping with Eu3+ and Eu2+ ions on the structural and spectroscopic properties of K2SrP2O7. By optimizing the combustion synthesis parameters, it was found that increasing Eu3+ ion concentration led to higher spectroscopic factors and structural defects, while successful incorporation of Eu2+ ions was confirmed through optical spectroscopy tests.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Thermodynamics
Aleksandra J. Pelczarska, Irena Szczygiel
Summary: Na3RE(PO4)(2) phosphates were obtained by precipitation from sols under mild hydrothermal conditions, showing a molar ratio of Na:RE:P equal to 3:1:2. Most of the powders have a trigonal structure, except for Na3La(PO4)(2) compounds.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Aleksandra J. Pelczarska, Dagmara Stefanska, Adam Watras, Lucyna Macalik, Irena Szczygiel, Jerzy Hanuza
Summary: KMeY(PO4)(2):5% Eu3+ phosphates were synthesized by a hydrothermal method and their spectroscopic, structural, and morphological properties were investigated. The obtained samples had an average crystal diameter of about 15 nm and showed improved crystallinity after thermal treatment. The luminescent properties of the samples were also enhanced, with the KSrY(PO4)(2):5% Eu3+ sample calcinated at 500 degrees C exhibiting the most intense emission.
Article
Chemistry, Multidisciplinary
Roman Micova, Cyril Rajnak, Jan Titis, Erika Samolova, Michal Zalibera, Alina Bienko, Roman Boca
Summary: Two hexacoordinate Mn(ii) complexes with a chelating residue of hexafluoroacetylacetone and (Cl-substituted) 4-benzylpyridine exhibit typical DC magnetic properties of S = 5/2 spin systems: g similar to 2, small D value. AC susceptibility studies confirm the presence of field-induced slow magnetic relaxation, with no involvement of over-barrier Orbach relaxation process. Both systems have two or three slow relaxation channels.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Natalia Tereba, Tadeusz M. Muziol, Joanna Wisniewska, Robert Podgajny, Alina Bienko, Grzegorz Wrzeszcz
Summary: Three new heterometallic compounds with different dimensional structures were successfully synthesized and characterized. The coordination polyhedra for copper were influenced by different polyamines, while the coordination polyhedra for nickel remained octahedral. This provides an approach for tailoring magnetic properties by selecting proper auxiliary ligands.
Article
Chemistry, Physical
A. J. Pelczarska, D. Stefanska, A. Kabanski, M. Ptak, R. Lisiecki, I. Szczygiel, J. Hanuza
Summary: In this study, powders of Na3+3xYb2-x(PO4)3: 1% Eu3+ were synthesized via a solid-state thermal method. The structural and spectroscopic properties were analyzed through various techniques. The materials exhibited NASICON-type structure and showed efficient red and infrared emissions under 395 nm excitation. The highest Yb3+ emission intensity was observed in the sample with the composition Na3.9Yb1.7(PO4)3: 1% Eu3+ (x = 0.3), and the compounds showed potential for non-contact temperature readout at high temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
B. Pilarek, M. Ptak, R. Lisiecki, L. Macalik, S. Smolka, I. Szczygiel, J. Hanuza
Summary: Research shows the existence of a new solid solution in the CaO-Nd2O3-Nb2O5 ternary oxide system. The dependence of various spectra and luminescence properties on mixture composition has been reported. Dilution of Nd3+ ions by gadolinium and lanthanum improves the luminescence properties. Spectroscopic measurements provide insights into the depopulation mechanism of Nd3+ electron excited states in the materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Romana Micova, Cyril Rajnak, Jan Titis, Alina Bienko, Jan Moncol, Erika Samolova, Roman Boca
Summary: Two hexacoordinate Co(II) complexes were synthesized and characterized. Their unique elongated tetragonal bipyramid geometry required the use of the Griffith-Figgis model to analyze the magnetic data. The ground electronic term of these complexes was quasi-degenerate due to crystal field splitting, resulting in four Kramers doublets that exhibited a significant mixing of spins. Both complexes showed field-supported slow magnetic relaxation governed by the Raman process.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Magdalena Malik, Anna Switlicka, Alina Bienko, Urszula K. Komarnicka, Dariusz C. Bienko, Sandra Koziel, Agnieszka Kyziol, Tomasz Mazur, Barbara Machura
Summary: The properties and reaction mechanisms of different copper complexes were studied through synthesis and characterization, and their toxicity against various cancer cell lines was tested. The use of micelles to load the complexes improved their solubility and reduced side effects.
Article
Chemistry, Inorganic & Nuclear
Martyna Ksiadzyna, Vasyl Kinzhybalo, Alina Bienko, Wojciech Medycki, Ryszard Jakubas, Cyril Rajnak, Roman Boca, Andrew Ozarowski, Mykhaylo Ozerov, Anna Piecha-Bisiorek
Summary: We report the physicochemical characteristics of novel Co-based pyrrolidinium analogs that exhibit dielectric and magnetic activity, and undergo a complex sequence of phase transitions.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Dusan Valigura, Cyril Rajnak, Jan Titis, Jan Moncol, Roman Boca, Atina Bienko
Summary: A hexacoordinate Cu(II) complex with intermolecular pi-pi stacking forms a 1D-chain structure. The DC magnetic data follow the Curie law at low temperature. AC susceptibility exhibits a field supported slow magnetic relaxation.
DALTON TRANSACTIONS
(2022)
Correction
Thermodynamics
D. Piotrowska, I. Szczygiel
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
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)