Article
Chemistry, Multidisciplinary
Dan Yu, Yongqiang Tan
Summary: The oxidation behavior of (Ti0.8Nb0.2)C in a steam environment between 1000-1200 degrees Celsius was investigated. It was found that below 1200 degrees Celsius, the oxide layer was compact and less than 7 micrometers thick, while at 1200 degrees Celsius, the oxide layer grew quickly to over 30 micrometers.
Article
Materials Science, Coatings & Films
Benjamin W. Lamm, Jake W. McMurray, Ercan Cakmak, Michael J. Lance, David J. Mitchell
Summary: In this study, the CALPHAD approach was used to investigate zirconium carbide deposition. Phase equilibria were calculated and used to explore the chemical vapor deposition (CVD) processing space in the ZrCl4-CH3SiCl3-CH4-H-2 system. The results showed that the most important factor in controlling the composition was the ratios of CH4:ZrCl4, which determined the nature of the composition - either carbide or silicide.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Chemical
Md. Mahmudul Hassan Mondol, Chul-Ung Kim, Chang Min Kim, Sung Hwa Jhung
Summary: ZrO2 supported on porous N-doped carbon (ZrO2@CN) with oxygen vacancy was prepared via carbonization of a composite of metal-azolate framework (MAF-6) and zirconium chloride (ZrCl4). The catalyst, ZrO2(2)@CN, exhibited high activity in oxidative desulfurization (ODS) with good recyclability, attributed to the effective production of & BULL;OH species through the synergy between Zr atom with O vacancy and N of carbon support for H2O2 activation. Therefore, ZrO2, especially ZrO2@CN with oxygen vacancy, can be suggested as a promising ODS catalyst.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Boren Ke, Wei Ji, Ji Zou, Weimin Wang, Zhengyi Fu
Summary: Highly dense zirconium carbide (ZrC) ceramics were obtained by spark plasma sintering (SPS) at low temperatures (1900°C) and high pressure (up to 200 MPa) using a carbon-fiber-reinforced carbon composite (C-f/C) mold. The ceramics showed limited grain growth and the formation of subgrains and high-density dislocations. The resulting ZrC ceramics exhibited high hardness and fracture toughness. The densification mechanism was mainly attributed to plastic deformation under high pressure, with the high dislocation density contributing to the high hardness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zhexin Cui, Junkai Liu, Pengfei Hu, Jie Qiu, Shijing Xie, Ruizhi Meng, Wenbo Liu, Junqiang Lu, Yanguang Cui, Chong Li, Guanghai Bai, Dan He, Di Yun
Summary: In this study, high-temperature steam oxidation of zirconium alloys at 1000 degrees C was conducted to determine the mechanism of the breakaway phenomenon. The oxide microstructures were characterized and an undulated structure of the oxide/metal interface was observed. A crack formation mechanism based on vacancies was proposed. Finally, an explanation for the high-temperature oxidation behavior of the Zr alloy was established.
Article
Energy & Fuels
Erjiang Hu, Meng Zhou, Zhaohua Xu, Yun Zhao, Geyuan Yin, Zuohua Huang
Summary: A comprehensive experimental and kinetic study was conducted on the low temperature oxidation and pyrolysis of iso-octane and CNPC 92#. The results showed that the five-component model predicted the major intermediates more accurately than the TRF model.
Article
Multidisciplinary Sciences
A. R. Massih, Lars O. Jernkvist
Summary: The study introduces a kinetic model for simulating the solid state phase transformation of common zirconium alloys used as fuel cladding material in light water reactors. The model, taking into account the influence of oxidation and hydrogen absorption, can predict alpha beta phase transformation under different conditions.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Mathematical
Thomas Borsoni, Marzia Bisi, Maria Groppi
Summary: We propose a general framework for the kinetic modelling of non-relativistic polyatomic gases, which allows for the characterization of each particle by its velocity and internal state. Various classical and semi-classical models can fit into this framework, and we prove the H-Theorem for the proposed kinetic equation. We also derive Euler equations as a zero-order approximation and demonstrate the application of the framework to the Hydrogen Fluoride gas.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2022)
Article
Electrochemistry
Jagadeesh Sure, D. Sri Maha Vishnu, Sunghun Choi, Hyun-Kyung Kim, Carsten Schwandt
Summary: Nano-sized powders of Ta1-xHfxC ceramics were synthesized by electro-deoxidation method at a significantly lower temperature than the conventional preparation methods. The synthesized ceramics exhibited excellent crystal structure and particle size distribution, and had better control over composition.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Daniel A. Mirabella, Celso M. Aldao
Summary: In the original paper, the authors discuss a sensing model that explains the response to a reducing gas based on the oxygen partial pressure. This Comment focuses on analyzing the gas detection mechanisms proposed in the work and how they lead to inconsistencies commonly found in literature.
Article
Materials Science, Ceramics
Kenneth Kane, Padraig Stack, Danny Schappel, Katherine Montoya, Peter Mouche, Elizabeth Sooby, Kurt Terrani
Summary: The study compared the high-temperature oxidation of 3D-printed SiC and CVD SiC, finding that thicker oxide scales were formed on 3D-printed SiC surfaces due to tensile hoop stresses driven by oxidation volume expansion during steam oxidation.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Thermodynamics
Peidong Li, Wei He, Jinglan Wang, Shubao Song, Jing Wang, Tenglong Lv, Jiuzhong Yang, Zhanjun Cheng, Lixia Wei
Summary: The low-temperature oxidation of 2-ethylfuran (EF2) was studied in this work using a jet-stirred reactor at atmospheric pressure. Over 20 oxidation products were detected and measured, and a detailed kinetic model was developed based on reported models and theoretical calculations.
COMBUSTION AND FLAME
(2022)
Article
Materials Science, Ceramics
Emanuele De Bona, Charles Maniere, Vincenzo M. Sglavo, Mattia Biesuz
Summary: ZrB2 is a promising material for extreme environment applications, and ultrafast high-temperature sintering (UHS) with the addition of sintering aids can achieve quick densification and high hardness, providing a quick and simple method for producing high-performance ZrB2-based components.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Multidisciplinary
Paniz Foroughi, Andriy Durygin, Shichen Sun, Zhe Cheng
Summary: This study demonstrates the flash sintering of single-phase Ta0.5Hf0.5B2 solid solution powder. The effects of limiting current density on microstructure and hardness of the flash-sintered samples were investigated. Higher limiting current density, deagglomerated powders, higher applied pressure, and better thermal insulation should be considered for future studies to achieve full densification of high-temperature ceramics using flash sintering.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Chemistry, Physical
Guangtao Chai, Weidong Zhang, Leonarda Francesca Liotta, Mingqi Li, Yanglong Guo, Anne Giroir-Fendler
Summary: The addition of zirconium significantly influences the physicochemical properties and catalytic performances of Zr-doped Co(3)O(4) catalysts, with 1% Zr-Co3O4 exhibiting the best performance in propane oxidation reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Qian Sun, En-hui Wang, Xin-mei Hou, Zhi-jun He, Tong-xiang Liang
Summary: The study investigated the effect of adding nano-Ca-10(PO4)(6)(OH)(2) on the compressive strength of calcium aluminate cement. The results showed that adding this nanomaterial significantly improved the compressive strength of the samples.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
You Xue, Yapeng Zheng, Enhui Wang, Tao Yang, Hongyang Wang, Xinmei Hou
Summary: Dopamine, uric acid, and ascorbic acid are biomolecules that play important roles in physiological processes. This study demonstrates that Ti3C2Tx/PtNP modified glassy carbon electrodes show good electrochemical performance for detecting dopamine and uric acid. Additionally, ascorbic acid enhances the detection of dopamine and promotes electrode stability. The findings are significant for the accurate and fast detection of these biomolecules in the healthcare industry.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Liming Yang, Feng Ru, Jinzhuo Shi, Tao Yang, Chunyu Guo, Yafeng Chen, Enhui Wang, Zhentao Du, Kuo-Chih Chou, Xinmei Hou
Summary: In this study, a feather-like NiCoP/NF catalyst was synthesized and demonstrated efficient hydrogen production and wastewater treatment under alkaline conditions. This work provides an important solution for addressing energy shortages and wastewater pollution.
CERAMICS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Chunyu Guo, Jinzhuo Shi, Feng Ru, Chunyang Zhao, Enhui Wang, Tao Yang, Xinmei Hou
Summary: By training and employing BP-ANN, the multistage oxidation behavior of aluminum silicon carbide (Al4SiC4) was investigated, considering the oxidation temperature, time, and aspect ratio. The results showed that the BP-ANN model can accurately and efficiently simulate the oxidation behavior of Al4SiC4 powders with different reaction laws. In addition, the extrapolation ability of the BP-ANN model allows for maintaining high accuracy and expanding the experimental data to 1.2 times the original range with a coefficient of determination >= 0.801. By incorporating a real physical picture model developed by the research group, the experimental data can be further expanded to 2.2 times. This study provides a new path for understanding the oxidation behavior of materials with multistage oxidation.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Yafeng Chen, Ge Meng, Ziwei Chang, Ningning Dai, Chang Chen, Xinmei Hou, Xiangzhi Cui
Summary: A bifunctional catalyst CoP2-Mo4P3/NF with rich heterointerfaces is successfully prepared by a two-step hydrothermal-phosphorylation method. The synergistic interaction between CoP2 and Mo4P3 heterointerfaces can optimize the electronic structure of active sites, resulting in improved HER/OER bifunctional catalytic activity. The synthesized catalyst exhibits excellent electrocatalytic activity in 1.0 M KOH and shows potential application prospects in water splitting.
Article
Materials Science, Ceramics
Ruqin Gao, Lifang Wang, Enhui Wang, Jianling He, Jianping Huang, Xinmei Hou
Summary: Diatomite-modified wood ceramics (DMWCs) were successfully prepared as an adsorbent to remove hydroquinone from wastewater. The adsorption kinetics and thermodynamics of DMWCs on hydroquinone were comprehensively studied. The results showed that DMWCs, with a porous structure, consisting of quartz and crystalline graphite, achieved a removal rate and adsorption capacity of 76.8% and 12.31 mg/g, respectively, at a hydroquinone dosage of 200 mg and pH 7. The pseudo-second-order kinetic model provided a better fit for the adsorption process of hydroquinone, with a correlation coefficient (R2 = 0.99) higher than other models. The Freundlich equation, Redlich-Peterson equation, and Koble-Corrigan equation all fitted well with the adsorption isotherm data, with correlation coefficients (R2) higher than 0.93. The regeneration test demonstrated that DMWCs maintained an elimination rate of hydroquinone above 73% even after 11 times of reuse. This study presents DMWCs as an effective adsorbent for the removal of hydroquinone from wastewater.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jingwen Cui, Guohan Yu, Lixin Zhang, Suping Li, Junjie Deng, Enhui Wang, Enxia Xu, Xinmei Hou
Summary: The internal working conditions of a phenol acetone salt-containing waste vertical incinerator (PASWVI) during steady operation were investigated using Ansys Fluent. The suitable industrial operation condition was found to be a waste fluid injection rate of 8 m/s. The erosion rates of corundum-mullite brick and corundum-composite spinel brick for 1 hour were calculated to be 3.60 x 10-3 kg/m2 and 1.68 x 10-3 kg/m2, respectively. This study provides valuable references for optimizing the refractories used in PASWVI.
CERAMICS INTERNATIONAL
(2023)
Article
Green & Sustainable Science & Technology
Shuang Liu, Tao Yang, Enhui Wang, Hailong Wang, Zhentao Du, Sheng Cao, Qiaobao Zhang, Kuo-Chih Chou, Xinmei Hou
Summary: In this study, an integrated N-doped 4H-SiC photoelectrocatalyst with a 3D nanohole structure was constructed via anodic oxidation process, and it exhibited excellent performance in the removal of heavy metal ions and organic pollutants in wastewater.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Ceramics
Yunsong Liu, Chunyu Guo, Yuying Gao, Enhui Wang, Enxia Xu, Tao Yang, Guangyao Chen, Xinmei Hou
Summary: The effect of Al3+ substitution on the morphology of CM2A8, as a toughening material, has been investigated using theoretical calculation and experimental methods. The first-principle calculation showed that Al3+ preferentially substitutes for Mg2+ and decreases the formation energy of CM2A8, resulting in the synthesis of pure CM2A8 phase. Moreover, the surface energy of Al3+-substituted CM2A8 is reduced, promoting the growth of platelet CM2A8. Experimental studies confirmed that Al3+ substitution can enhance the phase purity of CM2A8 and transform its morphology from equiaxed to platelet. When the substitution amount of Al3+ reaches x=0.2 (CaMg2-3xAl16+2xVxO27), platelet CM2A8 grains with a proportion of 93.4% can be obtained.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Linlin Zhou, Tao Yang, Kang Wang, Enhui Wang, Laipan Zhu, Kuo-Chih Chou, Hailong Wang, Xinmei Hou
Summary: This study focuses on improving the electrical output of piezoelectric nanogenerators (PENGs) by fabricating flexible polyvinylidene difluoride (PVDF)/6H-SiC composite films. Additionally, a hybrid nanogenerator combining both piezoelectric and triboelectric effects was also assembled. The results showed that the hybrid nanogenerator achieved output voltages nearly 4 times or 7 times higher than those of the PENG, providing a feasible approach for enhancing the electrical output of nano power sources.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Xingjun Duan, Hui Xu, Enhui Wang, Chunyu Guo, Zhi Fang, Tao Yang, Yunsong Zhao, Xinmei Hou
Summary: In this study, the quantitative relationship between various factors and the oxidation resistance of Ni-based superalloys was established using machine learning. The importance of different alloying elements and their coupling effect were clarified and discussed. It was found that Ti, Cr, and Al are the most important elements affecting the oxidation resistance, while Mo and Nb have a detrimental effect. Novel Ni-based superalloys with better oxidation resistance than commercial alloys were screened out based on these findings. This work provides new ideas for accelerating the design of novel Ni-based superalloys with better comprehensive properties.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Zhi Fang, Ming-Hui Shang, Yapeng Zheng, Qian Sun, Yong Xu, Xinmei Hou, Weiyou Yang
Summary: The energy level matching in 3D/2D perovskite heterojunctions can be optimized by the rationally designed 3D-CsPbI3/2D-(PY n )PbI4 (n = 1-4) heterojunctions, which can accelerate the migration of electrons from 3D to 2D and limit the backflow of electrons. These findings might provide some meaningful insights on the energy level matching in 3D/2D perovskite heterojunctions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Zhi Fang, Ming-Hui Shang, Yapeng Zheng, Qian Sun, Xinmei Hou, Weiyou Yang
Summary: This study proposes the use of a high-polarized organic zwitterionic spacer, p-aminobenzoic acid (PABA), to construct novel quasi-2D perovskite structures for stable and efficient solar cells.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yapeng Zheng, Zhi Fang, Minghui Shang, Qian Sun, Xinmei Hou, Weiyou Yang
Summary: Surface passivation is an effective strategy to enhance the stability of halide perovskites. Formation and adsorption energies are commonly used to screen passivators. However, local surface structure is found to be a crucial factor for the stability of tin-based perovskites after surface passivation. The weakened Sn-I bond strength and the formation of surface iodine vacancy are responsible for the poor surface structure stability in tin-based perovskites.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
You Xue, Tao Yang, Yapeng Zheng, Enhui Wang, Hongyang Wang, Laipan Zhu, Zhentao Du, Xinmei Hou, Kuo-Chih Chou
Summary: The self-polarization effect in PVDF/CsPbBr3 composite fibers is studied, which demonstrates outstanding voltage output under self-polarization conditions. The mechanism of self-polarization is revealed by analyzing the interfacial charge and electric field. The research also validates the practical applicability of PVDF/CsPbBr3-PENG in harvesting energy from human finger taps and tests its stability.
JOURNAL OF MATERIALS CHEMISTRY A
(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)