Article
Nanoscience & Nanotechnology
Guang-Rong Ding, Yao-Feng Wang, Guo-Yi Duan, You-Qian Fan, Bao-Hua Xu
Summary: A tungstated zirconia catalyst (WOx/ZrO2) was used for the continuous synthesis of adiponitrile (ADN) by gas-phase nitrilation. The catalyst with continuously distributed oligomeric WOx species (2D) showed efficient and selective transformation of DMA to ADN. In situ diffuse reflectance infrared Fourier transform spectroscopy investigations clarified the synergistic effect of these species in the activation of DMA/NH3 and thereby nitrilation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Peide Luo, Xiang Wu, Wenhui Xiao, Fan Zhang, Yao Wang, Dandan Huang, Yong Du
Summary: The phase relations in the ZrO2-Ta2O5-Nb2O5 system were experimentally investigated and thermodynamically modeled. It was found that Ta2O5 and Nb2O5 phases substantially extend into the ternary system, forming a continuous solid solution. Despite initial difficulties in reproducing experimental results, the introduction of ternary mixing parameters allowed for improved thermodynamic descriptions and successful validation of the data.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Thermodynamics
Juan Manuel Martinez, Maria Susana Conconi, Fernando Booth, Nicolas M. Rendtorff
Summary: A Zr-modified bentonite (B-OHZr) was obtained by intercalation of OH-Zr species and its thermal transformations at > 800 degrees C were studied. The Zr interlayering enhanced the refractoriness of the parental clay, allowing sintering at higher temperatures, showing promising features for potential applications in ceramic materials with zircon content.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Crystallography
Alexander Zubkov, Tatiana Bugrova, Mikhail Salaev, Grigory Mamontov
Summary: Two series of chromium-zirconium mixed oxide catalysts with different Cr/Zr molar ratio were prepared by co-precipitation method. The catalysts synthesized without ageing of precipitate showed higher activity in propane dehydrogenation, likely due to the higher content of reducible Cr+5/(+6) species stabilized on the ZrO2 surface.
Article
Construction & Building Technology
Yakov Lipatov, Sergey Gutnikov, Bogdan Lazoryak
Summary: The addition of lanthanum oxide increases the tensile strength of zirconium-rich basalt continuous fibers by 15-20%, lowers the production temperature, widens the production temperature range, improves their alkali resistance, and reduces cost significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Applied
Fabio Salomone, Enrico Sartoretti, Sabrina Ballauri, Micaela Castellino, Chiara Novara, Fabrizio Giorgis, Raffaele Pirone, Samir Bensaid
Summary: In recent decades, efforts have been made to reduce CO2 emissions and convert it into useful chemicals and liquid fuels like methanol. This study focuses on the development of catalysts for hydrogenating CO2 to methanol, where In2O3-based catalysts have shown promising results. The effects of CeO2 and ZrO2 on the catalytic performance were investigated, and it was found that ZrO2 enhanced the specific activity and stability of the catalysts, while the addition of CeO2 did not have a beneficial effect.
Article
Physics, Particles & Fields
F. Naderi, A. Rezaei-Aghdam, Z. Mahvelati-Shamsabadi
Summary: In this paper, we present two new families of spatially homogeneous black hole solutions for Horava-Lifshitz Gravity equations with general coupling constant. The horizons are modeled on two types of Thurston 3-geometries and are neither spherical, hyperbolic, nor toroidal, representing a unique type of black hole solution. Using the Hamiltonian formalism, we establish the conventional thermodynamics of the solutions defining the mass and entropy of the black hole solutions.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Materials Science, Ceramics
Edward L. Pang, Gregory B. Olson, Christopher A. Schuh
Summary: By conducting a comparative study on sintered pellets and powders, this research investigates the reasons behind decreased transformation temperatures and incomplete transformation in zirconia materials. The study finds that transformation temperatures are depressed in pellets due to grain constraint, while incomplete transformation in powders is attributed to insufficient driving force.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Michael Sheindlin, Alexander Frolov, Sergei Petukhov, David Bottomley, Kurata Masaki, Dario Manara, Davide Costa
Summary: The evaporation behavior of ZrO2 and Zr-Fe-O systems was investigated in this study using heating with laser pulses of millisecond duration and time-of-flight mass spectrometry. The findings suggest that evaporation of zirconia occurs in a noncongruent mode at temperatures above 3000 K, while the evaporation of the Zr-Fe-O system is greatly influenced by the fast evaporation of FeO.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
D. L. Mariano, M. A. V. Heringer, D. C. Freitas, V. M. Andrade, E. B. Saitovitch, M. A. Continentino, L. Ghivelder, E. C. Passamani, D. R. Sanchez
Summary: The novel A-doped Co3O2BO3 (A(4+)=Zr, Hf) ludwigites were synthesized for the first time and found to exhibit different magnetic properties and dimensions depending on the dopant ion used. Doping with non-magnetic ions Zr and Hf preserved the two-dimensional antiferromagnetic character, while Sn led to three-dimensional magnetism. The experimental results suggest an antiferromagnetic structure with a ferromagnetic component for Zr and Hf dopants.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Andreas Flaureau, Alicia Weibel, Geoffroy Chevallier, Jerome Esvan, Christophe Laurent, Claude Estournes
Summary: Carbon is deposited onto a commercial 3YSZ powder bed using chemical vapor deposition, resulting in a few-layered-graphene (FLG) film. The powders are then consolidated by spark plasma sintering, leading to FLG located along the grain boundaries of the 3YSZ matrix. Pure 3YSZ exhibits higher toughness and fracture strength compared to composites, but the toughness of composites increases with increased carbon content. The composites are electrically conducting within a certain carbon concentration range.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Nils-Christian Petry, Anke Silvia Ulrich, Bo Feng, Emanuel Ionescu, Mathias Christian Galetz, Maren Lepple
Summary: The aim of this study was to investigate the effect of polymer-derived ceramics used as sintering aids on the high-temperature oxidation behavior of ZrB2-based monoliths. The experimental results showed improved oxidation resistance compared to ZrB2-SiC materials. The formation of gaseous species during oxidation and their role in explaining the oxidation behavior and the formation of bubbles were rationalized using thermodynamic equilibrium calculations.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jian Peng, Brian Jolly, David J. Mitchell, J. Allen Haynes, Dongwon Shin
Summary: This study focuses on the computational thermodynamic analysis of SiC chemical vapor deposition, revealing that low pressure and medium temperatures are beneficial for efficiently depositing high-purity SiC.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Sahar Raissi, Afef Najjari, Mohamed Kadri Younes
Summary: This study aimed to synthesize zirconia doped with cobalt aerogel and xerogel solids using solgel procedure. The synthesized nanoparticles were characterized and tested for antimicrobial activity against Gram-positive and Gram-negative pathogenic bacteria. The results showed that the synthesized Co/Zr aerogels had spherical shapes with nanometric sizes and exhibited higher antibacterial activity against Escherichia coli, Klebsiella pneumoniae, and Staphylococcus aureus.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Miklos Jakab, Osamah Ihsan Ali, Istvan Gabor Gyurika, Tamas Korim, Judit Telegdi
Summary: This research work investigated the wear and friction properties of TiN/TiC coatings produced with different manufacturing parameters against steel and zirconium counterparts. The coatings on WC-Co substrate were characterized for their microstructure, phase composition, and microhardness. The coatings' tribological behavior was examined using pin-on-disc tests with steel and zirconium counterfaces, while adhesion was investigated with a modified scratch test. The results showed the advantage of using zirconium counterpart even for coatings with different microhardness and layer thickness produced by the CVD method. The changes in friction coefficient determined the wear resistance of the coating.
Article
Polymer Science
Karina Santiago-Castillo, Aide Minerva Torres-Huerta, Deyanira del Angel-Lopez, Miguel Antonio Dominguez-Crespo, Hector Dorantes-Rosales, Diana Palma-Ramirez, Helen Willcock
Summary: This study reports a two-step process for the preparation of PVA-CTS-Ag electrospun fibers and analyzes their microstructural, mechanical, and antibacterial properties, confirming their potential application in the biomedical field.
Article
Chemistry, Physical
J. J. de la Cruz-Cruz, M. A. Dominguez-Crespo, E. Ramirez-Meneses, A. M. Torres-Huerta, S. B. Brachetti-Sibaja, A. E. Rodriguez-Salazar, E. Pastor, L. E. Gonzalez-Sanchez
Summary: Pd and Pd-based catalysts are considered the best alternative to Pt for hydrogen production due to their similar electronic structures and more abundant reserves. The in-situ synthesis of PdNi/C electrode materials with different Ni content showed that low Ni amounts can enhance hydrogen adsorption on the bimetallic active surface, leading to improved electrochemical surface area and real area. The synergistic effect between Pd and Ni components in PdNi alloys improves the overpotential of the hydrogen evolution reaction, with Ni content influencing hydrogen adsorption resistance and charge transfer resistance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
J. J. de la Cruz-Cruz, M. A. Dominguez-Crespo, E. Ramirez-Meneses, A. M. Torres-Huerta, S. B. Brachetti-Sibaja, A. E. Rodriguez-Salazar, E. Pastor, L. E. Gonzalez-Sanchez
Summary: This study evaluates the effect of Ni amount on the hydrogen evolution reaction during the in situ synthesis of vulcan supported PdNi nanostructures using an organometallic approach in alkaline medium. The results show that adjusting the organometallic method can improve the electrochemical performance of the hydrogen evolution reaction.
Article
Environmental Sciences
A. Licona-Aguilar, A. M. Torres-Huerta, M. A. Dominguez-Crespo, D. Palma-Ramirez, E. Conde-Barajas, M. X. L. Negrete-Rodriguez, A. E. Rodriguez-Salazar, D. S. Garcia-Zaleta
Summary: This study synthesized activated carbons from sugarcane bagasse and orange peel and used carbon foams for the adsorption of heavy metals in synthetic water. The results showed that carbon foam from orange peel exhibited a higher removal rate for lead and copper at pH 5.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
A. I. Licona-Aguilar, A. M. Torres-Huerta, M. A. Dominguez-Crespo, D. Palma-Ramirez, E. Conde-Barajas, M. X. L. Negrete-Rodriguez, A. E. Rodriguez-Salazar, D. S. Garcia-Zaleta
Summary: This document provides additional information on the production of activated carbons and carbon foams from agroindustrial wastes, specifically orange peel and sugarcane bagasse. The data presented includes characterization of carbonaceous structures, such as surface area analysis and pore size distribution, as well as the evaluation of their electrokinetic potential. The document also demonstrates the adsorption capacity of these materials for the removal of metallic ions in polluted waters. The findings contribute to the promotion of the reuse of agroindustrial wastes and the synthesis of carbonaceous structures for water purification.
Article
Chemistry, Applied
K. Anaya-Garza, A. M. Torres-Huerta, M. A. Dominguez-Crespo, J. Moreno-Palmerin, E. Ramirez-Meneses, A. E. Rodriguez-Salazar
Summary: The dip-coating method was used to create a UHMWPE/ODPA bilayer coating on Ti6Al4V alloys, effectively improving their corrosion resistance and delaying the failure of medical implants.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Physical
G. Zacahua-Tlacuatl, E. Ramirez-Meneses, A. Manzo-Robledo, A. M. Torres-Huerta, I. Betancourt, K. Philippot, M. Ibrahim, M. A. Dominguez-Crespo
Summary: In this study, polyvinylpyrrolidone (PVP)-stabilized palladium-rhodium nanostructures were synthesized for use as carbon-supported electrodes (PdxRh1-x-PVP/C) in the methanol oxidation reaction (MOR). The nanostructures were prepared through the hydrogenation of tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3) and tris(allyl) rhodium (Rh(h3-C3H5)3) complexes in tetrahydrofuran (THF) with PVP as a stabilizer. The resulting nanostructures exhibited enhanced methanol electro-oxidation in alkaline medium due to the synergistic effect between Pd and Rh metals. Among the evaluated electrode materials, the Pd8Rh2-PVP/C electrode showed the highest catalytic activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Polymer Science
L. P. A. Guerrero-Ortega, E. Ramirez-Meneses, I Betancourt, L. Lartundo-Rojas, R. Mendoza-Cruz, A. M. Torres-Huerta, M. A. Dominguez-Crespo
Summary: In this study, different long-chain primary alkylamines were used to stabilize Ni-NiO nanoparticles, and it was found that the chain length affected the microstructural and magnetic properties. The surface composition and particle size were also influenced by the primary alkylamines.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Environmental Sciences
Luisiana Morales-Zamudio, Alejandro Fierro-Cabo, Md Saydur Rahman, Miguel Antonio Dominguez-Crespo
Summary: House geckos cohabitate with humans in tropical and subtropical regions. These geckos are exposed to suspended particulate matter and dust, and as exotic species, they have unique behaviors and biological traits. The study found that the metal contents in these geckos are related to the air pollution sources in their environment, suggesting that they can be used as biomonitoring indicators for metal pollutants.
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
(2023)
Article
Chemistry, Physical
Sarahi Pacheco-Espinoza, Alejandro I. I. Cuesta-Balderas, Jorge Vazquez-Lujano, Abril Rosiles-Aguilera, Maria A. Hernandez-Perez, Felipe Cervantes-Sodi, Fei Chen, Qiang Shen, Rong Tu, Jorge R. R. Vargas-Garcia, Lian-Meng Zhang
Summary: The development of 1D cerium oxide (CeO2) hollow nanostructures has attracted attention for their superior properties and anisotropic geometry. This study reports a novel method to fabricate multiwalled CeO2-delta nanotubes (CeO2-delta NTs) by converting functionalized multiwalled carbon nanotubes (f-MWCNTs) through oxidation and dehydration reactions. The CeO2-delta NTs exhibit a low direct band gap and an unusually high presence of Ce3+ ions and surface O vacancies.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Metallurgy & Metallurgical Engineering
Antonio Romero-Serrano, Josue Lopez-Rodriguez, Aurelio Hernandez-Ramirez, Alejandro Cruz-Ramirez, Cancio Jimenez-Lugos, Miguel Perez-Labra
Summary: This article proposes that the capacity of slag to hold sulphide may be a unique property that can be calculated based on temperature and composition, even for slags containing significant amounts of dissolved sulphides such as CaO or Na2O. A structural model incorporating sulphide ions (S2-) in the silicate network is used to calculate the sulphide capacity of SiO2-Na2O binary and SiO2-Na2O-MO (M = Ca, Mg, Mn, Fe) ternary systems. The model takes into account the substitution of one metal oxide for another in ternary systems and relies solely on data from the binary subsystems without any ternary adjustable parameters.
IRONMAKING & STEELMAKING
(2023)
Article
Biotechnology & Applied Microbiology
M. E. Juarez-Mendez, D. Palma-Ramirez, S. B. Brachetti-Sibaja, A. M. Torres-Huerta, M. A. Dominguez-Crespo, D. S. Garcia Zaleta, H. J. Dorantes-Rosales, F. Gutierrez-Galicia
Summary: This study investigates the transformation of SUP cups into crystalline nanocellulose (CNC) and the effects of acid hydrolysis concentration on its properties. The optimized CNC obtained at 64% v/v concentration exhibits ribbon-like morphologies rich in cellulose types I alpha and II with high crystallinity and nanosize scale. PMMA-g-CNC samples show high thermal stability and nanometric scale, making them potential reinforcement agents for incompatible polymers.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Food Science & Technology
A. I. Licona-Aguilar, J. A. Lois-Correa, A. M. Torres-Huerta, M. A. Dominguez-Crespo, V. Urdapilleta-Inchaurregui, A. E. Rodriguez-Salazar, S. B. Brachetti-Sibaja
Summary: In this study, dietary fibers (DF) were synthesized from SCB wastes and incorporated into wheat flour in different amounts to make composite cookies. The study evaluated the potential use of these cookies in bakery products and compared them with control biscuits made with only wheat flour. The results showed that the DF from SCB residues had a high content of insoluble dietary fiber, making them suitable for human consumption. The composite cookies had different effects on color parameters depending on the amount of DF used. The sensory evaluation indicated that the acceptance of the cookies increased with the addition of bagasse, with the highest acceptance at 15 g kg(-1). The use of SCB wastes as a source of DF is a feasible alternative for the formulation of bakery products.
LWT-FOOD SCIENCE AND TECHNOLOGY
(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)
