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vanadium 5

hydrogen-free carburizing 2

solvent extraction 2

in situ alloying 1

CaV8O20 1

Co3(VO4)2 1

Honeycomb structure 1

MXene 1

Palermo 1

Physical alloying 1

Polyethylene 1

Polypropylene 1

V-bearing steel slag 1

V-concentrating phase 1

additive manufacturing 1

age-hardening high speed steel 1

aluminium metal matrix composite 1

austempered ductile iron (ADI) 1

bismuth vanadium tetraoxide 1

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Mechanical properties of vanadium-alloyed austempered ductile iron for crankshaft applications

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0746-2

Abstract: desirable combination of mechanical properties for crankshaft applications by the combined effect of vanadium(V) alloying and an optimized heat treatment process.the carbon enrichment of austenite phases in ADI samples were remarkably affected by the addition of vanadium

Keywords： austempered ductile iron (ADI)     vanadium alloying     mechanical properties     crankshafts     retained austenite    

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Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 902-912 doi: 10.1007/s11705-019-1887-z

Abstract: High-manganese containing vanadium wastewater (HMVW) is commonly produced during the vanadium extractionprocess from vanadium titano-magnetite.In the solvent extraction process, 98.15% of vanadium was recovered, and the V O product, with a purity

Keywords： high-manganese containing vanadium wastewater     solvent extraction     carbonate precipitation     vanadium titano-magnetite    

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Highly efficient and selective removal of vanadium from tungstate solutions by microbubble floating-extraction

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5,   Pages 581-593 doi: 10.1007/s11705-022-2235-2

Abstract: Selective separation of dissolved tungsten and vanadium is of great significance for the utilizationIn this work, selective removal of vanadium from tungstate solutions via microbubble floating-extractionThe results indicated that vanadium can be more easily mineralized over tungsten from tungstate solutionsAdditionally, the deep recovery of tungsten and vanadium from the floated organic phase could be easilyUnder the optimal conditions, the removal efficiency of vanadium reached 98.5% with tungsten loss below

Keywords： tungsten     vanadium     selective separation     reagent mineralization     microbubble floating-extraction    

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Rapid alloying of CoCrFeMnNi high-entropy alloy from elemental feedstock toward high-throughput synthesis

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0727-x

Abstract: High-entropy alloys (HEAs) are considered alternatives to traditional structural materials because of their superior mechanical, physical, and chemical properties. However, alloy composition combinations are too numerous to explore. Finding a rapid synthesis method to accelerate the development of HEA bulks is imperative. Existing in situ synthesis methods based on additive manufacturing are insufficient for efficiently controlling the uniformity and accuracy of components. In this work, laser powder bed fusion (L-PBF) is adopted for the in situ synthesis of equiatomic CoCrFeMnNi HEA from elemental powder mixtures. High composition accuracy is achieved in parallel with ensuring internal density. The L-PBF-based process parameters are optimized; and two different methods, namely, a multi-melting process and homogenization heat treatment, are adopted to address the problem of incompletely melted Cr particles in the single-melted samples. X-ray diffraction indicates that HEA microstructure can be obtained from elemental powders via L-PBF. In the triple-melted samples, a strong crystallographic texture can be observed through electron backscatter diffraction, with a maximum polar density of 9.92 and a high ultimate tensile strength (UTS) of (735.3 ± 14.1) MPa. The homogenization heat-treated samples appear more like coarse equiaxed grains, with a UTS of (650.8 ± 16.1) MPa and an elongation of (40.2% ± 1.3%). Cellular substructures are also observed in the triple-melted samples, but not in the homogenization heat-treated samples. The differences in mechanical properties primarily originate from the changes in strengthening mechanism. The even and flat fractographic morphologies of the homogenization heat-treated samples represent a more uniform internal microstructure that is different from the complex morphologies of the triple-melted samples. Relative to the multi-melted samples, the homogenization heat-treated samples exhibit better processability, with a smaller composition deviation, i.e., ≤ 0.32 at.%. The two methods presented in this study are expected to have considerable potential for developing HEAs with high composition accuracy and composition flexibility.

Keywords： laser powder bed fusion (L-PBF)     in situ alloying     high-entropy alloys     heat treatment     rapid    

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Characterization and comparison of organic functional groups effects on electrolyte performance for vanadium

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1221-1230 doi: 10.1007/s11705-023-2298-8

Abstract: The vanadium redox flow battery with a safe and capacity-controllable large-scale energy storage systemstability limitations, as well as to investigate the effects of various organic functional groups on the vanadium0.22 Ah, 5.0 Wh·L–1, 85.0%), the results show that taurine has the advantage of maintaining vanadium

Keywords： vanadium redox flow battery     functional groups     organic additives     energy density     stability    

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Utilization of waste vanadium-bearing resources in the preparation of rare-earth vanadate catalysts for

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1793-1806 doi: 10.1007/s11705-022-2191-x

Abstract: we proposed a new strategy for the utilization of petrochemical-derived carbon black waste, a waste vanadium-bearingChemical leaching was employed to extract metallic vanadium from the waste and the leachate containingcontaminated Na+ during the leaching process showed strong competitive coordination with the vanadiumOur work provides a valuable new reference for preparing vanadate catalysts by the use of abundant vanadium-bearing

Keywords： petrochemical solid wastes     vanadium recovery     resource utilization     nanomaterials     semi-hydrogenation    

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Vanadium and molybdenum concentrations in particulate from Palermo (Italy): analytical methods using

Diana AMORELLO,Santino ORECCHIO

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 605-614 doi: 10.1007/s11783-014-0703-8

Abstract: The main purpose of this work was to develop a reliable method for the determination of vanadium (V)Vanadium concentrations in particulate samples collected in Palermo area ranged from 0.57 to 7.7 ng·m

Keywords： vanadium     molybdenum     particulate     voltammetry     Palermo    

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A New Method for Strengthening Wrought Superalloys: micro-alloying with Phosphorus and Boron

Hu Zhuangqi,Sun Wenru,Song Hongwei

Strategic Study of CAE 2005, Volume 7, Issue 3,   Pages 17-26

Abstract: By micro-alloying with phosphorus and boron, alloys with extended rupture life are developed, the service

Keywords： wrought superalloy     phosphorus     boron     micro-alloying    

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Vanadium metabolism investigation using substance flow and scenario analysis

Fangfang ZHANG, Huiquan LI, Bo CHEN, Xue GUAN, Yi ZHANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 256-266 doi: 10.1007/s11783-013-0585-1

Abstract: Vanadium is a vital strategic resource, and vanadium metabolism is an important part of the nationalThis study conducts accounting and scenario analysis on the life cycle of vanadium metabolism in Chinaa quantitative evaluation of a static anthropogenic vanadium life cycle for the year 2010.The overall utilization ratio of vanadium is 32.2%.A large amount of vanadium is stockpiled into tailings, debris, slags, and other spent solids.

Keywords： metabolism     vanadium industry     substance flow analysis     scenario analysis    

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Synthesis of cobalt vanadium nanomaterials for efficient electrocatalysis of oxygen evolution

Meifeng Hao, Mingshu Xiao, Lihong Qian, Yuqing Miao

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 409-416 doi: 10.1007/s11705-017-1689-0

Abstract:

A low-cost and high-activity catalyst for oxygen evolution reaction (OER) is the key to the water splitting technology for hydrogen generation. Here we report the use of three solvents, DMF, ethanol and glycol, in the solvothermal synthesis of three nano-catalysts, Co3(VO4)2-I, Co3(VO4)2-II, and Co3(VO4)2-III, respectively. Transmission electron microscope shows Co3(VO4)2-I, II, and III exist as ultrafine nanosheets, ultrathin nanofilms, and ultrafine nanosheet-comprised microspheres, respectively. These Co3(VO4)2 catalysts exhibit OER electrocatalysis, among which the Co3(VO4)2-II shows the lowest onset overpotential of 310 mV and only requires a small overpotential of 330 mV to drive current density of 10 mA/cm2. Due to their high surface free energy, the ultrathin nanofilms of Co3(VO4)2-II exhibits a good immobilization effect with the high electrocatalytic activity for OER.

Keywords： Co3(VO4)2     oxygen evolution reaction     electrocatalyst     water splitting    

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Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 56-67 doi: 10.1007/s11705-022-2185-8

Abstract: Separation of vanadium from black shale leaching solution at low pH is very meaningful, which can effectivelyavoid the generation of alkali neutralization slag and the resulting vanadium loss.In this study, coordination mechanism of vanadium in acid leaching solution at low pH was investigatedethylhexyl)phosphoric acid concentration of 20%, phase ratio of 1:2, and extraction time of 8 min, the vanadiumH2O–V, the V–Cl bond is longer and the potential difference between coordinate ions and vanadium

Keywords： vanadium     black shale     solvent extraction     high acidity extraction    

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Research on Characteristic of Double Glow Discharge Plasma Surface Alloying Process

Gao Yuan,Xu Jinyong,Gao Qing,An Jinping,Xu Zhong

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 26-30

Abstract:

The principle, Discharge mode, alloying process and research works ofThe technology is fit for high melting point metal surface alloying and surface alloying in surface of

Keywords： double glow discharge plasma surface alloying process     high melting point metal     hollow cathode effect    

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Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic oxidative desulfurization

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 276-287 doi: 10.1007/s11705-022-2242-3

Abstract: Particle size governs the electronic and geometric structure of metal nanoparticles (NPs), shaping their catalytic performances in heterogeneous catalysis. However, precisely controlling the size of active metal NPs and thereafter their catalytic activities remain an affordable challenge in ultra-deep oxidative desulfurization (ODS) field. Herein, a series of highly-efficient VOx/boron nitride nanosheets (BNNS)@TiO2 heterostructures, therein, cetyltrimethylammonium bromide cationic surfactants serving as intercalation agent, BNNS and MXene as precursors, with various VOx NP sizes were designed and controllably constructed by a facile intercalation confinement strategy. The properties and structures of the prepared catalysts were systematically characterized by different technical methods, and their catalytic activities were investigated for aerobic ODS of dibenzothiophene (DBT). The results show that the size of VOx NPs and V5+/V4+ play decisive roles in the catalytic aerobic ODS of VOx/BNNS@TiO2 catalysts and that VOx/BNNS@TiO2-2 exhibits the highest ODS activity with 93.7% DBT conversion within 60 min under the reaction temperature of 130 °C and oxygen flow rate of 200 mL·min–1, which is due to its optimal VOx dispersion, excellent reducibility and abundant active species. Therefore, the finding here may contribute to the fundamental understanding of structure-activity in ultra-deep ODS and inspire the advancement of highly-efficient catalyst.

Keywords： oxidative desulfurization     boron nitride     vanadium     MXene     intercalation confinement    

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Industrial-Scale Polypropylene-Polyethylene Physical Alloying Toward Recycling Article

Jinping Qu, Zhaoxia Huang, Zhitao Yang,  Guizhen Zhang, Xiaochun Yin, Yanhong Feng, Hezhi He, Gang Jin, Ting Wu, Guangjian He, Xianwu Cao  

Engineering 2022, Volume 9, Issue 2,   Pages 95-100 doi: 10.1016/j.eng.2021.02.021

Abstract:

Polypropylene (PP) and polyethylene (PE) play central roles in our daily life. However, their immiscibility presents a major hurdle in both industry and academia when recycling them into alloys with favorable mechanical properties. Moreover, typical compatibilizer-enabled approaches are limited due to increased environmental concerns. Herein, inspired by a traditional Chinese technique, we report a facile, industryscale methodology that produces a PP/PE binary blend with a highly ordered honeycomb nanostructure without any additives. Due to its nanostructure, the blend exhibits enhanced tensile properties in comparison with the parent components or with a sample prepared using an internal mixer. This approach has potential for applications not only in immiscible polymer blending, but also in non-sorting, compatibilizer-free waste plastics recycling. Through this technique, we expect that an environmentally friendly and sustainable plastic wastes recycling avenue can be found, and great economic benefits can be gained.

Keywords： Polypropylene     Polyethylene     Physical alloying     Honeycomb structure    

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Development of Plasma Surface Metallurgy Technology

Xu Zhong

Strategic Study of CAE 2002, Volume 4, Issue 2,   Pages 36-41

Abstract: The double glow surface alloying process, which developed based on the plasma nitriding, is a kind ofRecently the double glow surface alloying process has been applied to titanium and its alloys.

Keywords： plasma     plasma surface metallurgy technology     double glow surface alloying process    

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Title Author Date Type Operation

Mechanical properties of vanadium-alloyed austempered ductile iron for crankshaft applications

Journal Article

Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Journal Article

Highly efficient and selective removal of vanadium from tungstate solutions by microbubble floating-extraction

Journal Article

Rapid alloying of CoCrFeMnNi high-entropy alloy from elemental feedstock toward high-throughput synthesis

Journal Article

Characterization and comparison of organic functional groups effects on electrolyte performance for vanadium

Journal Article

Utilization of waste vanadium-bearing resources in the preparation of rare-earth vanadate catalysts for

Journal Article

Vanadium and molybdenum concentrations in particulate from Palermo (Italy): analytical methods using

Diana AMORELLO,Santino ORECCHIO

Journal Article

A New Method for Strengthening Wrought Superalloys: micro-alloying with Phosphorus and Boron

Hu Zhuangqi,Sun Wenru,Song Hongwei

Journal Article

Vanadium metabolism investigation using substance flow and scenario analysis

Fangfang ZHANG, Huiquan LI, Bo CHEN, Xue GUAN, Yi ZHANG

Journal Article

Synthesis of cobalt vanadium nanomaterials for efficient electrocatalysis of oxygen evolution

Meifeng Hao, Mingshu Xiao, Lihong Qian, Yuqing Miao

Journal Article

Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Journal Article

Research on Characteristic of Double Glow Discharge Plasma Surface Alloying Process

Gao Yuan,Xu Jinyong,Gao Qing,An Jinping,Xu Zhong

Journal Article

Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic oxidative desulfurization

Journal Article

Industrial-Scale Polypropylene-Polyethylene Physical Alloying Toward Recycling

Jinping Qu, Zhaoxia Huang, Zhitao Yang,  Guizhen Zhang, Xiaochun Yin, Yanhong Feng, Hezhi He, Gang Jin, Ting Wu, Guangjian He, Xianwu Cao  

Journal Article

Development of Plasma Surface Metallurgy Technology

Xu Zhong

Journal Article