Resource Type

Journal Article 21

Year

2023 6

2022 2

2021 2

2020 2

2019 2

2018 2

2015 2

2014 1

2010 1

2007 1

open ︾

Keywords

vanadium 5

Magnetite 3

solvent extraction 2

Adsorption 1

CaV8O20 1

Co3(VO4)2 1

Diphenylarsinic acid (DPAA) 1

EXAFS 1

Fe3O4 nanoparticles 1

Fe3O4/salicylic acid nanocomposite 1

Lattice oxygen 1

MXene 1

Mill-scale 1

Palermo 1

Phosphate 1

Platinum metals 1

Sequential extraction 1

Siderite 1

Sorption 1

Strong metal-support interaction (SMSI) 1

open ︾

Search scope:

排序： Display mode:

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    

HTML PDF Collect

Adsorption of phosphate on magnetite-enriched particles (MEP) separated from the mill scale

Muhammad Kashif Shahid, Yunjung Kim, Young-Gyun Choi

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1151-2

Abstract: In present study, the phosphate adsorption on novel magnetite-enriched particles (MEP) was comprehensivelyThe XRD and XRF analysis of MEP identified the dominant existence of crystalline magnetite.Furthermore, the morphological analysis of MEP confirmed the agglomerate porous morphology of magnetiteOxygen and iron, the main constituents of magnetite were acknowledged during the elemental analysis using

Keywords： Adsorption     Magnetite     Mill-scale     Phosphate     Wastewater treatment    

HTML PDF Collect

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 vanadiumthe 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    

HTML PDF Collect

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    

HTML PDF Collect

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    

HTML PDF Collect

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and

María Fernanda HORST,Verónica LASSALLE,María Luján FERREIRA

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 746-769 doi: 10.1007/s11783-015-0814-x

Abstract: Nanosized magnetite has emerged as an adsorbent of pollutants in water remediation.

Keywords： nanomagnetite     water remediation     toxic metals     dyes     supported magnetite    

HTML PDF Collect

Sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1547-2

Abstract:

• DPAA sorption followed pseudo-secondary and intra-particle diffusion models.

Keywords： Diphenylarsinic acid (DPAA)     Sorption     Magnetite     Siderite     Sequential extraction     EXAFS    

HTML PDF Collect

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    

HTML PDF Collect

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    

HTML PDF Collect

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    

HTML PDF Collect

Development of a magnetite-gene complex for gene transfection

Jian XIN BM, Ze-Feng XIA MD, Kai-Xiong TAO MD, Kai-Lin CAI PhD, Gao-Xiong HAN MD, Xiao-Ming SHUAI MD, Ji-Liang WANG MD, Han-Song DU MD, Guo-Bin WANG PhD, Yan LUO MM,

Frontiers of Medicine 2010, Volume 4, Issue 2,   Pages 241-246 doi: 10.1007/s11684-010-0032-7

Abstract: The key to successful gene therapy is to find a suitable method and carrier for transfection to allow a gene to be transferred into a cell and integrated into the target gene. The aim of this study was to determine whether biomagnetic material could be combined with the nucleic acid for gene transfection. Dextran-coated iron oxide nanoparticles (DCIONPs) were prepared and mixed with the plasmid pGenesil-1 containing the test gene, which expresses enhanced green fluorescent protein (eGFP). PGenesil-1 empty vector was used as a control. The binding ability was assessed by electrophoresis of the DNA on agarose gels and quantification using BANDSCAN software. Using different gene carriers, Lipofectamine 2000, Sofast, and DCIONPs, the large intestine cancer (Lovo) cell line was transfected with or without a magnetic field. The expression of eGFP was observed by fluorescence microscopy, and the transfection efficiency was compared. The results showed there was a rapid increase in combining rate when the quality ratio of DCIONPs and pGenesil-1 ascended from 1∶1 to 5∶1. However, the combining rate increased less rapidly as the quality ratio continued ascending. The expression of eGFP showed that the early transfection rate could be improved by applying a magnetic field. In conclusion, the DCIONPs we synthesized are able to carry plasmid DNA and enhance the early transfection efficiency when using a magnetic field.

Keywords： nanoparticle     magnetite     gene therapy     magnetofection    

HTML PDF Collect

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    

HTML PDF Collect

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    

HTML PDF Collect

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    

HTML PDF Collect

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 450-459 doi: 10.1007/s11705-020-1930-0

Abstract: In this research, an eco-friendly magnetic adsorbent based on Fe O /salicylic acid nanocomposite was fabricated using a facile one-pot co-precipitation method. The crystalline and morphological characterization of the prepared nanocomposite was performed by field emission scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The nanocomposite was employed as a magnetic solid-phase extraction agent for separation of Cd(II) ions from synthetic solutions. Some experimental factors affecting the extraction efficiency were investigated and optimized. Following elution with acetic acid (pH 3.5), the pre-concentrated analyte was quantified by flame atomic absorption spectrometry. In optimal conditions, a linear calibration graph was achieved in the concentration range of 0.2‒30 ng·mL with a determination coefficient ( ) of 0.9953. The detection limit, the enhancement factor, inter- and intra-day relative standard deviations (for six consecutive extractions at the concentration level of 10 ng·mL ) were 0.04 ng·mL , 100, 2.38% and 1.52%, respectively. To evaluate the accuracy of the method, a certified reference material (NIST SRM 1643e) was analyzed, and there was a good agreement between the certified and the measured values. It was successfully utilized to determine cadmium in industrial wastewater samples and the attained relative recovery values were between 96.8% and 103.2%.

Keywords： cadmium     magnetic solid-phase extraction     Fe3O4 nanoparticles     Fe3O4/salicylic acid nanocomposite     flame atomic absorption spectrometry    

HTML PDF Collect

Title Author Date Type Operation

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

Adsorption of phosphate on magnetite-enriched particles (MEP) separated from the mill scale

Muhammad Kashif Shahid, Yunjung Kim, Young-Gyun Choi

Journal Article

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

Journal Article

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

Journal Article

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

Journal Article

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and

María Fernanda HORST,Verónica LASSALLE,María Luján FERREIRA

Journal Article

Sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite: Evidence from sorption

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

Vanadium metabolism investigation using substance flow and scenario analysis

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

Journal Article

Development of a magnetite-gene complex for gene transfection

Jian XIN BM, Ze-Feng XIA MD, Kai-Xiong TAO MD, Kai-Lin CAI PhD, Gao-Xiong HAN MD, Xiao-Ming SHUAI MD, Ji-Liang WANG MD, Han-Song DU MD, Guo-Bin WANG PhD, Yan LUO MM,

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

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

Journal Article

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Journal Article