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Recovery and separation of Fe and Mn from simulated chlorinated vanadium slag by molten salt electrolysis

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1678-1686页

作者： Shi-yuan liu Yu-lan Zhen Xiao-bo He li-jun Wang Kuo-chih chou Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Tailings from the vanadium extraction process are discarded each year as waste,which contain approximately 30 wt%of *** our previous work,we extracted Fe and Mn from vanadium slag,and Fe and Mn existed in the form of FeCl_(2) and MnCl_(2) after chlorination by NH_(4) Cl to achieve effective and green usage of waste containing Fe and *** this work,square wave voltammetry(SWV)and cyclic voltammetry(CV)were applied to investigate the electrochemical behaviors of Fe^(2+)and Mn^(2+)in Na Cl-KCl melt at 800℃.The reduction processes of Fe^(2+)and Mn^(2+)were found to involve one *** diffusion coefficients of FeCl_(2) and Mn Cl_(2) in molten salt of eutectic mixtures Na Cl-KCl molten salt were *** electrodeposition of Fe and Mn were performed using two electrodes at a constant cell *** Mn/Fe mass ratio of the electrodeposited product in Na Cl-KCl-2.13 wt%FeCl_(2)-1.07 wt%Mn Cl_(2) was 0.0625 at 2.3 *** the electrolysis of NaCl-KCl-2.13 wt%Fe Cl_(2)-1.07 wt%MnCl_(2) melted at 2.3 V,the electrolysis was again started under 3.0 V and the Mn/Fe mass ratio of the electrodeposited product was *** process provides a novel method to effectively separate Fe and Mn from simulated chlorinated vanadium slag.

关键词： vanadium slag molten salt electrolysis separation electrochemical analysis

Thermodynamic prediction of martensitic transformation temperature in Fe-C-X(X=Ni,Mn,Si,Cr)systems with dilatational coefficient model

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Journal of Materials Science & Technology 2022年第17期112卷 291-300页

作者： Hongcan Chen Wei Xu Qun Luo Qian li Yu Zhang Jingjing Wang Kuo-Chih chou State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National Engineering Research Center for Magnesium Alloy Chongqing UniversityChongqing 400044China Ansteel Beijing Research Institute Co. LtdBeijing 102211China

Martensitic transformation is significant to strengthen steels,but its thermodynamic prediction is restricted to simple systems due to lacking multicomponent interaction *** driving forces of martensitic transformation can be divided into chemical and non-chemical driving *** magnetic parameters are carefully optimized because it affects the magnetic Gibbs free energy of austenite and ferrite,and have big impact on the chemical driving *** dilatational strain energy provides major contribution to non-chemical driving force,thus the integrated-models for dilatational coefficient are constructed in a wide composition and temperature range based on the experimental dilatational *** expands the scope of application of thermodynamic model and improved prediction accuracy of martensitic transformation temperature(M_(s)).The prediction error reaches 5.6%for Fe-C-X(X=Ni,Mn,Si,Cr)and6.5%for Fe-C-Mn-Si-X(X=Cr,Ni)steels.

关键词： Martensitic transformation Thermodynamics Dilatational strain energy linear expansion coefficient Fe-C-X(X=Ni,Mn,Si,Cr)system

Effects of freeze-thaw cycle and dry-wet alternation on slope stability

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Research in Cold and Arid Regions 2019年第2期11卷 159-172页

作者： Yaling chou liYuan Sun BaoAn li Xiaoli Wang School of Civil Engineering Lanzhou University of Technology Jiangsu JiaoTong Traffic Design Research Institute Co. Ltd.

The typical loess on high slopes along the BaoLan High-speed Rail, China, was selected as the research object. The influence of the freeze-thaw cycle and dry-wet alternation on the shear-strength parameters of the unsaturated loess was investigated by laboratory experimental methods. Moreover, the temperature field, seepage field, and stability of slopes with different gradients were simulated under the effect of the freeze-thaw cycle and dry-wet alternation by using the geotechnical analysis software Geo-Studio. The research results showed(1) when the freeze-thaw cycle was repeated on the slope, with the frozen depth increasing, the melted depth did the same; besides, the closed loop of isotherms formed on the slope;(2) under the action of dry-wet circulation, the negative pore-water pressure and volumetric water content showed an upward tendency. However, owing to the different slope gradients, rainfall infiltration was not the same. As time went by, the differences of the negative pore-water pressure and volumetric water content between the slopes of different gradients continued to increase;(3) with the freeze-thaw cycle and dry-wet alternation increasing, the slope-safety factor decreased. Especially in the early period, the slope-safety factor changed remarkably. For slopes undergoing freeze-thaw action, the slope-safety factor was negatively correlated with the gradient. However, with regard to slopes undergoing dry-wet alternation, the result became more complex because the slope-safety factor was related to both seepage strength and slope grade. Accordingly, further research is needed to study the effect of seepage strength and slope grade on the stability of loess slopes.

关键词： freeze-thaw action dry-wet alternation temperature field seepage field slope stability

Impact of intracellular innate immune receptors on immunometabolism

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Cellular & Molecular Immunology 2022年第3期19卷 337-351页

作者： Wei-Chun chou Elena Rampanelli Xin li Jenny P-Y.Ting lineberger Comprehensive Cancer Center University of North Carolina at Chapel HillChapel HillNC27599USA Department of Genetics University of North Carolina at Chapel HillChapel HillNC27599USA Amsterdam UMC(University Medical Center location AMC)Department of Experimental Vascular MedicineAGEM(Amsterdam Gastroenterology Endocrinology Metabolism)InstituteMeibergdreef 91105 AZAmsterdamThe Netherlands Comparative Immunology Research Center College of Veterinary MedicineChina Agricultural UniversityBeijing100193China

Immunometabolism,which is the metabolic reprogramming of anaerobic glycolysis,oxidative phosphorylation,and metabolite synthesis upon immune cell activation,has gained importance as a regulator of the homeostasis,activation,proliferation,and differentiation of innate and adaptive immune cell subsets that function as key factors in *** changes in epithelial and other stromal cells in response to different stimulatory signals are also crucial in infection,inflammation,cancer,autoimmune diseases,and metabolic *** crosstalk between the PI3K-AKT-mTOR and LKB1-AMPK signaling pathways is critical for modulating both immune and nonimmune cell *** bidirectional interaction between immune cells and metabolism is a topic of intense ***-like receptors(TLRs),cytokine receptors,and T and B cell receptors have been shown to activate multiple downstream metabolic ***,how intracellular innate immune sensors/receptors intersect with metabolic pathways is less well *** goal of this review is to examine the link between immunometabolism and the functions of several intracellular innate immune sensors or receptors,such as nucleotide-binding and leucine-rich repeat-containing receptors(NLRs,or NOD-like receptors),absent in melanoma 2(AIM2)-like receptors(ALRs),and the cyclic dinucleotide receptor stimulator of interferon genes(STING).We will focus on recent advances and describe the impact of these intracellular innate immune receptors on multiple metabolic *** appropriate,this review will provide a brief contextual connection to pathogenic infections,autoimmune diseases,cancers,metabolic disorders,and/or inflammatory bowel diseases.

关键词： Immunometabolism NLRs NLRP3/AIM2 inflammasomes innate sensors/receptors STING AKT-mTOR

Recent research progresses in ether-and ester-based electrolytes for sodium-ion batteries

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InfoMat 2019年第3期1卷 376-389页

作者： Zeheng lin Qingbing Xia Wanlin Wang Weishan li Shulei chou Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia School of Chemistry and Environment South China Normal UniversityGuangzhouChina National and Local Joint Engineering Research Center of MPTES in High Energy and Safety liBs Engineering Research Center of MTEES(Ministry of Education)Key Laboratory of ETESPG(GHEI)South China Normal UniversityGuangzhouChina

Owing to the natural abundance and low cost of sodium resources,sodium-ion batteries(SIBs)have drawn considerable attention for state-of-the-art power storage devices over the last few *** enable advanced SIBs with a brighter future,great effort has been made,not only through optimizing the electrode materials,but also with rationally designing various electrolyte *** the available electrolyte systems,organic electrolytes,especially those based on esters as well as ethers,are the most promising ones for practical application in the foreseeable future,due to their numerous inherent *** review is concerned with the recent research progresses on organic electrolytes for SIBs,focusing on etherbased and ester-based ones.

关键词： electrolyte additives organic electrolytes sodium salts sodium-ion batteries

Tuning single-phase medium-entropy oxides derived from nanoporous NiCuCoMn alloy as a highly stable anode for li-ion batteries

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稀有金属:英文版 2023年第9期42卷 2982-2992页

作者： Zhen-Yang Yu Qi Sun Hao li Zhi-Jun Qiao Wei-Jie li Shu-Lei chou Zhi-Jia Zhang Yong Jiang School of Mechanical Engineering Tiangong UniversityTianjin300387China State Key Laboratory for Powder Metallurgy Central South UniversityChangsha410083China School of Material Science and Engineering Tiangong UniversityTianjin300387China School of Electronic and Information Engineering Institute of Quantum Materials and DevicesTiangong UniversityTianjin300387China

Incorporating four cations into a single-phase oxide is beneficial for maintaining structural stability during li+insertion/desertion because of the produced entropy-dominated phase stabilization effects. However,medium-entropy oxides exhibit inherently poor electron and ion conductivity. As such, in this work, a single-phase medium-entropy oxide of Ni_(x)Cu_(y)CozMn_(1-x-y-z)O(named as NCCM@oxides(H_(2))) is prepared by modified-NiCuCoMn alloy through the epitaxial-growing-based self-combustion and hydrogen reduction. During hydrogen reduction, some Cu ions are reduced to elemental Cu(defined as Cu^(0)),which is distributed among the metal oxides, while generating extensive oxygen vacancies around Cu. The synergetic effect between nanoporous metal-core oxide-shell structure and enriched oxygen/Cu^(0) vacancies greatly enhances the electronic/ionic conductivity. In addition, the lattice of single-phase quaternary metal oxides has the configuration entropy stability, which enables the rock-salt structure to remain stable during repeated conversion reactions. Benefiting from the above-mentioned merits, the anodeforli-ionbatterieswithentropy-stabled NCCM@oxides(H_(2)) composite shows a high specific capacity of 699 mAh·g^(-1) at 0.1 A·g^(-1) and ultra-stable cycling stability, which maintains 618 and 489 mAh·g^(-1) at 0.1 and 1.0 A·g^(-1) after 200 cycles, respectively. This is the first use of this novel and simple strategy for modifying medium-entropy oxides, which paves the way for the development of high-entropy oxides as high-performance electrodes.

关键词： NiCuCoMn alloy Medium-entropy oxides li-ion batteries Ultrahigh stability Mechanism

Interdiffusion in the Fe_2O_3-TiO_2 system

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 273-278页

作者： Zhong-shan Ren Xiao-jun Hu Shen-yang li Xiang-xin Xue Kuo-chih chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical Ecological Engineering University of Science and Technology Beijing School of Materials and Metallurgy Northeastern University

Interdiffusion in the Fe203-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti4＋ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coeffi- cients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti4＋ cations increasing, and they were in the range of 10-12-10-11cm2-s-1. The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti4＋ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.

关键词： interdiffusion titanium dioxide iron oxides diffusion couples electron probe microanalysis

Synthesis of Al_(4)SiC_(4) powders via carbothermic reduction: Reaction and grain growth mechanisms

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Journal of Advanced Ceramics 2017年第4期6卷 351-359页

作者： Xinming XING Junhong CHEN Guoping BEI Bin li Kuo-Chih chou Xinmei HOU School of Material Science and Technology University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering 3MEDelft University of TechnologyDelft2628CDthe Netherlands State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Highly pure Al_(4)SiC_(4) powders were prepared by carbothermic reduction at 2173 K using Al_(2)O_(3),SiO_(2),and graphite as raw *** obtained Al_(4)SiC_(4) powders owned hexagonal plate-like grains with a diameter of about 200-300μm and a thickness of about 2-6μ*** on the experimental results,the reaction of Al_(4)SiC_(4) formation and grain evolution mechanisms were determined from thermodynamic and first-principles *** results indicated that the synthesis of Al_(4)SiC_(4) by the carbothermic reduction consisted of two parts,i.e.,solid-solid reactions initially followed by complex gas-solid and gas-gas *** grain growth mechanism of Al_(4)SiC_(4) featured a two-dimensional nucleation and growth *** gas phases formed during the sintering process favored the preferential grain growth of(0010)and(110)planes resulting in formation of hexagonal plate-like Al_(4)SiC_(4) grains.

关键词： Al_(4)SiC_(4) carbothermic reduction hexagonal plate-like growth mechanism

Effect of Preparation Methods on Hydriding Properties of La1.5Mg17 Ni0.5 Composite Materials

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Journal of Rare Earths 2004年第Z2期22卷 110-113页

作者： Jiang lijun Xiao Fang li Qian lin Qin Zhan Feng chou Kouchih Lei Tingquan General Research Institute for Non-Ferrous Metal Beijing 100088China Department of Material Science and Engineering Harbin Institute of TechnologyHarbin 150001China General Research Institute for Non-Ferrous MetalBeijing 100088China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China General Research Institute for Non-Ferrous MetalBeijing 100088China Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Department of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

La1.5Mg17Ni0.5 hydrogen storage materials were prepared by hydriding combustion synthesis (HCS) and mechanical alloying (MA) method respectively. The experimental results show that the hydrogen absorption properties of La1.5Mg17Nio.5 prepared by MA are better than that by HCS. La1.5Mg17Nio.5 prepared by MA can absorb 6.73 mass% hydrogen at 523 K within 1 min, and 4.92 mass% hydrogen at 423 K. The improvement of hydriding properties of La1.5Mg17Ni0.5alloy prepared by MA can be ascribed to the formation of nano-crystalline and defects during the mechanical alloying.

关键词： hydriding combustion synthesis mechanical alloying hydrogen storage material hydriding property