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Journal articles on the topic 'Vanadium oxides'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Kapelyushin, Yu, V. Roshchin, and A. Roshchin. "Beneficiation of Vanadium and Titanium Oxides by Using Selective Extraction of Iron in Low-Titanium Magnetite Concentrate." Solid State Phenomena 265 (September 2017): 913–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.913.

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Issues with existing vanadium beneficiation stimulate the development of new technologies for wasteless production of vanadium. The present work investigates a possibility of beneficiation of vanadium and titanium oxides in a low-titanium magnetite concentrate by using selective reduction and extraction of iron. Iron was selectively reduced by coal without melting and separated from the oxide (slag) phase during further smelting operation. After the liquid-phase separation vanadium and titanium oxides were accumulated in a slag phase. The following products were produced: slag, containing vana

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2

Monfort, Olivier, and Patrícia Petrisková. "Binary and Ternary Vanadium Oxides: General Overview, Physical Properties, and Photochemical Processes for Environmental Applications." Processes 9, no. 2 (2021): 214. http://dx.doi.org/10.3390/pr9020214.

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This review article is a comprehensive report on vanadium oxides which are interesting materials for environmental applications. Therefore, a general overview of vanadium and its related oxides are presented in the first two parts. Afterwards, the physical properties of binary and ternary vanadium oxides in single and mixed valence states are described such as their structural, optical, and electronic properties. Finally, the use of these vanadium oxides in photochemical processes for environmental applications is detailed, especially for the production of hydrogen by water splitting and the d

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3

Zavalij, Peter Y., and M. Stanley Whittingham. "Structural chemistry of vanadium oxides with open frameworks." Acta Crystallographica Section B Structural Science 55, no. 5 (1999): 627–63. http://dx.doi.org/10.1107/s0108768199004000.

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The present work is dedicated to a crystal-chemical and topographical analysis of vanadium oxides with open structures. The review covers, apart from a few exceptions, only pure vanadium oxide structures with vanadium in oxidation states greater than +3. Purely tetrahedral frameworks are not discussed because of their traditional, well known crystal chemistry and only a few examples of cluster compounds are provided. Structural classification and notation of vanadium oxide frameworks are proposed based on the following scheme: polyhedra → chain → layer → three-dimensional framework. Thus, appr

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4

Miyata, H., S. Tokuda, and T. Yoshida. "Quantitative Characterization of Raman Spectra of Vanadium Oxides Layered on SiO2." Applied Spectroscopy 43, no. 3 (1989): 522–26. http://dx.doi.org/10.1366/0003702894203039.

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The Raman spectra of vanadium oxides layered on Aerosil have been quantitatively investigated. First, the number of peaks and three parameters of each peak were estimated in a self-generating initial parameter estimation using the B-spline functions. These parameters were refined by a nonlinear optimization technique using the Simplex method. For a series of V2O5/SiO2, three types of vanadium oxide—such as a small cluster vanadate, surface polyvanadate, and crystalline vanadium oxide—were identified and quantitated by Raman spectroscopy. The small cluster surface species is shown to increase w

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5

Nohrina, Olga I., Irina D. Rogihina, Marina A. Golodova, and Denis V. Valuev. "Resource-Saving Technologies in Production Cold-Resistant Steels." Key Engineering Materials 839 (April 2020): 93–98. http://dx.doi.org/10.4028/www.scientific.net/kem.839.93.

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The possibility of application for steel alloying with vanadium of the technology based on restoration of vanadium from oxides of converter vanadic slag with use of the reducers (carbon of a koksik and silicon of ferrosilicium) having low cost and a purge gaseous nitrogen with high coefficient of extraction of the alloying element is shown.

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6

Feng, Z., M. E. McBriarty, A. U. Mane та ін. "Redox-driven atomic-scale changes in mixed catalysts: VOX/WOX/α-TiO2 (110)". RSC Adv. 4, № 110 (2014): 64608–16. http://dx.doi.org/10.1039/c4ra14140g.

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X-ray study of vanadium–tungsten mixed-monolayer-oxide catalysts grown on the rutile α-TiO<sub>2</sub> (110) single crystal surface shows redox behavior not observed for lone supported vanadium or tungsten oxides.

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7

Ilinskit A.V. and Shadrin E.B. "Conductive properties of Magneli series oxides: VO and V-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=-." Physics of the Solid State 64, no. 6 (2022): 704. http://dx.doi.org/10.21883/pss.2022.06.54373.289.

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A comparative analysis of the electrically conductive properties of strongly correlated oxides: vanadium oxide VO and vanadium pentoxide V2O5, belonging to opposite ends of the Magneli series, is carried out. It is shown that, despite the radical difference in the symmetry of the crystal lattices of these compounds, these materials have a number of fundamental common properties, the main of which are the dependence of the width of the energy gap (gap band) on the occupation of the conduction band by electrons and the occurrence in both compounds of an electronic Mott transition extended in tem

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8

Larina, Tatyana V., Svetlana V. Cherepanova, Nina A. Rudina, Boris A. Kolesov, and Andrey N. Zagoruiko. "Characterization of vanadia catalysts on structured micro-fibrous glass supports for selective oxidation of hydrogen sulfide." Catalysis for Sustainable Energy 2, no. 1 (2016): 87–95. http://dx.doi.org/10.1515/cse-2015-0007.

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AbstractThis work is focused on the characterization of a novel vanadium pentoxide catalysts on a glass-fiber support. The catalyst support consists of a non-porous glass-fiber fabric covered with an additional external surface layer of porous secondary support of SiO2. The vanadia active component is synthesized from vanadyl oxalate precursor by means of an impulse surface thermo-synthesis method. Such catalysts demonstrate high activity and appropriate selectivity in the reaction of H2S oxidation by oxygen into sulfur in the practically important temperature range below 200°C. According to t

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9

Miquel, Philippe F., Cheng-Hung Hung, and Joseph L. Katz. "Formation of V2O5-based mixed oxides in flames." Journal of Materials Research 8, no. 9 (1993): 2404–13. http://dx.doi.org/10.1557/jmr.1993.2404.

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V2O5–TiO2 and V2O5–Al2O3 mixed oxide powders were synthesized in a hydrogen-oxygen flame using VOCl3, TiCl4, and Al(CH3)3 as precursors. The particle formation processes were investigated as a function of VOCl3 concentration by laser light-scattering and by collecting particles directly onto transmission electron microscopy grids. In the V2O5–TiO2 system, the oxides condense as an intimate mixture at all three VOCl3 concentrations. Spherical particles, 40 to 70 nm in diameter, are obtained. In the V2O5–Al2O3 system, chain-like particles composed of an intimate mixture of V2O5 and Al2O3 form at

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10

Pergament, A. L. "Metal-Insulator Transition Temperatures and Excitonic Phases in Vanadium Oxides." ISRN Condensed Matter Physics 2011 (November 17, 2011): 1–5. http://dx.doi.org/10.5402/2011/605913.

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The possibility of applying the excitonic insulator model to the description of metal-insulator transitions in vanadium oxide Magneli phases is investigated. Based on the Animalu transition metal model potential, the equation for the constant of Coulomb interaction in the theory of excitonic insulator is modified. It is shown that this theory allows the transition temperatures of all the oxides to be calculated. The conformity of the theory with the experimental data concerning the effective mass values for electrons in vanadium oxides is discussed.

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11

Ye, Zhi Guo, Xian Liang Zhou, Hui Min Meng, Xiao Zhen Hua, Ying Hu Dong, and Ai Hua Zou. "The Electrochemical Characterization of Electrochemically Synthesized MnO₂-Based Mixed Oxides for Supercapacitor Applications." Advanced Materials Research 287-290 (July 2011): 1290–98. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1290.

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Nanostructured elements, including: manganese-molybdenum (Mn-Mo) oxide, manganese-molybdenum-tungsten (Mn-Mo-W) oxide, manganese-molybdenum-iron (Mn-Mo-Fe) oxide, manganese-molybdenum-cobalt (Mn-Mo-Co) oxide, manganese-vanadium-tungsten (Mn-V-W) oxide, manganese-vanadium-iron (Mn-V-Fe) oxide and manganese-iron (Mn-Fe) oxide, have been anodically deposited onto titanium substrates by employing an iridium dioxide interlayer (Ti/IrO2anode). The electrochemical characteristics of the resultant oxide deposits have been investigated by cyclic voltammetry (CV) in an aqueous 0.1 M Na2SO4solution. The

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12

Nakhal, Suliman, Wilfried Hermes, Thorsten Ressler, Rainer Pöttgen, and Martin Lerch. "Synthesis, Crystal Structure and Magnetic Properties of Bixbyite-type Vanadium Oxide Nitrides." Zeitschrift für Naturforschung B 64, no. 3 (2009): 281–86. http://dx.doi.org/10.1515/znb-2009-0305.

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Ammonolysis of vanadium sulfide leads to the formation of bixbyite-type vanadium oxide nitrides. Small amounts of nitrogen incorporated in the structure result in the stabilization of the bixbyite type not known for vanadium oxides. The crystal structure was investigated using X-ray diffraction and X-ray absorption spectroscopy. At temperatures above 550 °C the powders decompose to corundumtype V2O3 containing no detectable amount of nitrogen. Below 39 K magnetic ordering is observed.

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13

Wu, Yuhan, Guangbo Chen, Xiaonan Wu, et al. "Research progress on vanadium oxides for potassium-ion batteries." Journal of Semiconductors 44, no. 4 (2023): 041701. http://dx.doi.org/10.1088/1674-4926/44/4/041701.

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Abstract Potassium-ion batteries (PIBs) have been considered as promising candidates in the post-lithium-ion battery era. Till now, a large number of materials have been used as electrode materials for PIBs, among which vanadium oxides exhibit great potentiality. Vanadium oxides can provide multiple electron transfers during electrochemical reactions because vanadium possesses a variety of oxidation states. Meanwhile, their relatively low cost and superior material, structural, and physicochemical properties endow them with strong competitiveness. Although some inspiring research results have

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14

Wani, B. N., and U. R. K. Rao. "Fluorination of Vanadium Oxides." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 21, no. 5 (1991): 779–91. http://dx.doi.org/10.1080/15533179108016842.

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15

Antol, Marcel, Katarina Prandová, and Milan Hronec. "Promoted TiO2 (Anatase)-Supported Vanadium Oxide Catalysts. TPR Study and Activity in Oxidation of Toluene." Collection of Czechoslovak Chemical Communications 61, no. 11 (1996): 1665–74. http://dx.doi.org/10.1135/cccc19961665.

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Vanadium oxide doped with K, Li, Bi, Sb, Te, U or Mo oxide, supported on TiO2 - anatase, was studied by temperature programmed reduction (TPR). The influence of the addition of promoters (up to molar ratio M : V = 0.5) to 5 wt.% V2O5/TiO2 catalyst on the TPR profile is presented in correlation with their catalytic activity in the vapor phase oxidation of toluene. All promoters, except Bi2O3, decrease the catalyst reducibility and decrease the rate of the toluene oxidation. A strong negative influence on the activity of the toluene oxidation have K, Li, and Te oxides. However, the presence of a

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16

Vasić, Milica M., Miloš Milović, Danica Bajuk-Bogdanović, Tamara Petrović, and Milica J. Vujković. "Simply Prepared Magnesium Vanadium Oxides as Cathode Materials for Rechargeable Aqueous Magnesium Ion Batteries." Nanomaterials 12, no. 16 (2022): 2767. http://dx.doi.org/10.3390/nano12162767.

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Vanadium-oxide-based materials exist with various vanadium oxidation states having rich chemistry and ability to form layered structures. These properties make them suitable for different applications, including energy conversion and storage. Magnesium vanadium oxide materials obtained using simple preparation route were studied as potential cathodes for rechargeable aqueous magnesium ion batteries. Structural characterization of the synthesized materials was performed using XRD and vibrational spectroscopy techniques (FTIR and Raman spectroscopy). Electrochemical behavior of the materials, ob

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17

Bonne, R. L. C., A. D. Vanlangeveld, and J. A. Moulijn. "Temperature-Programmed Sulfiding of Vanadium Oxides and Alumina-Supported Vanadium Oxide Catalysts." Journal of Catalysis 154, no. 1 (1995): 115–23. http://dx.doi.org/10.1006/jcat.1995.1153.

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18

MIKHAILOVSKAYA, T. P., R. KURMAKYZY, D. K. TOLEMISOVA, and K. A. KADIRBEKOV. "OXIDATIVE AMMONOLYSIS OF 4-METHYLPYRIDINE ON OXIDE VANADIUM-TITANIUM-ZIRCONIUM CATALYST MODIFIED BY TIN AND TUNGSTEN OXIDES." Chemical Journal of Kazakhstan 73, no. 1 (2021): 196–203. http://dx.doi.org/10.51580/2021-1/2710-1185.21.

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Catalysts based on vanadium pentoxide modified by Ti, Sn, Zr and W oxides were tested in the oxidative ammonolysis of 4-methylpyridine. The role of the main process parameters such as temperature, the ratio of the initial components in the conversion of the methyl group to the nitrile one, and the optimal conditions for the oxidative ammonolysis of 4-methylpyridine were determined. It is determined that the V-Ti-Zr-O-catalyst and the sample containing 9% of tungsten oxide are superior in catalytic activity to the V-Ti-Zr-Sn-O contact. Conditions that ensure a high selectivity for the formation

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19

Zazhigalov, V. A., K. Wieczorek-Ciurowa, O. V. Sachuk, and I. V. Bacherikova. "Mechanochemystry as advanced methodology in green chemistry for applied catalysis." Catalysis and Petrochemistry, no. 31 (2021): 1–16. http://dx.doi.org/10.15407/kataliz2021.31.001.

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In this survey we have assessed how mechanochemistry techniques comply with the aims of Green Chemistry to minimise the use of environmentally damaging reactants and unwanted by-products. In the publications the preparation of vanadium-phosphorus oxides as industrial catalysts for maleic anhydride production from n-butane and perspective catalysts of phthalic anhydride manufacture by direct n-pentane oxidation were analyzed. It is shown that mechanochemical activation and synthesis reduces the amount of harmful waste used in the production of the catalyst and increases its effectiveness. Impro

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20

Sarkar, Arnab, Raju V. Shah, D. Alamelu, and Suresh K. Aggarwal. "Studies on the ns-IR-Laser-Induced Plasma Parameters in the Vanadium Oxide." Journal of Atomic, Molecular, and Optical Physics 2011 (October 16, 2011): 1–7. http://dx.doi.org/10.1155/2011/504764.

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We report spectroscopic studies of laser-induced plasma (LIP) produced by ns-IR-Nd:YAG laser light pulses of different energies onto four different oxides of vanadium (VO, V2O3, VO2, and V2O5) in air under atmospheric pressure. For each oxide with a different oxidation state of vanadium, both electron density and plasma temperature were calculated for different time delays and laser pulse energies. The plasma temperature was determined from Boltzmann plot method, whereas the electron number density was estimated from the Saha equation. The decay rates for plasma temperature as well as electron

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21

Nguen, T. D., A. I. Zanko, D. A. Golosov, S. M. Zavadski, S. N. Melnikov, and V. V. Kolos. "Electrophysical properties of vanadium oxide films deposited by reactive magnetron sputtering." Doklady BGUIR 18, no. 6 (2020): 94–102. http://dx.doi.org/10.35596/1729-7648-2020-18-6-94-102.

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The aim of this work was to study the effect of the gas composition during sputtering on the electrophysical properties of vanadium oxide films deposited by pulsed reactive magnetron sputtering of a vanadium target in an Ar/O2 medium of working gases.The dependences of the magnetron discharge voltage, deposition rate, resistivity, temperature coefficient of resistance (TCR), and the band gap of vanadium oxide films on the oxygen concentration in the gas mixture are obtained. It was found that amorphous films of vanadium oxide are formed during reactive magnetron sputtering. It is shown that th

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22

Brodskaya, Valeria A., Oksana A. Molkova, Kira B. Zhogova, and Inga V. Astakhova. "Study of the microstructure and particles of vanadium (III) oxide, vanadium (V) oxide and lithium aluminate powders." Industrial laboratory. Diagnostics of materials 86, no. 1 (2020): 32–37. http://dx.doi.org/10.26896/1028-6861-2020-86-1-32-37.

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Powder materials are widely used in the manufacture of electrochemical elements of thermal chemical sources of current. Electrochemical behavior of the powders depends on the shape and size of their particles. The results of the study of the microstructure and particles of the powders of vanadium (III), (V) oxides and lithium aluminate obtained by transmission electron and atomic force microscopy, X-ray diffraction and gas adsorption analyses are presented. It is found that the sizes of vanadium (III) and vanadium (V) oxide particles range within 70 – 600 and 40 – 350 nm, respectively. The siz

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23

Zhou, Meifang, Fuzhi Huang, Xingdong Wang, Johan du Plessis, Anthony B. Murphy, and Rachel A. Caruso. "Porous Vanadium/Titanium Oxides—Synthesis, Characterization, and Photocatalytic Activity." Australian Journal of Chemistry 60, no. 7 (2007): 533. http://dx.doi.org/10.1071/ch06405.

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Sol–gel chemistry and a templating technique were combined for the synthesis of vanadium/titanium oxides with controlled porous structure and various quantities of vanadium (0–9.7 at-%). The specific surface area of the porous vanadium/titanium oxides increased with increasing vanadium content to a maximum of 72 m2 g–1 at 6.6 at-% V, with a corresponding decrease in anatase crystal size (minimum of 12.4 nm), and c-axis lattice parameter (0.9475 nm). The optical band-gap decreased substantially from 3.10 eV for TiO2 to 2.53 eV on the addition of 9.7 at-% V. The adsorption capability of the oxid

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24

Tominov, Roman V., Artyom A. Avakyan, Zakhar E. Vakulov, Vadim I. Avilov, Vladimir A. Smirnov, and Oleg A. Ageev. "Synthesis and Resistive Switching of Nanocrystalline Vanadium Oxide Films." Materials Proceedings 4, no. 1 (2020): 42. http://dx.doi.org/10.3390/iocn2020-07800.

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This work is devoted to the study of the modes of synthesis of films of nanocrystalline vanadium oxide for the manufacture of resistive memory elements (ReRAM) of neuromorphic systems. The regularities of the influence of pulsed laser deposition modes on the morphology and electrophysical properties of vanadium oxide films were experimentally established considering the technological parameters of the substrate temperature and temperature of postgrowth annealing. Fabrication modes of nanocrystalline vanadium oxide films were determined with the high-resistance state RHRS = (123.42 ± 21.77) × 1

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25

Hu, Chi-Chang, Kuo-Hsin Chang, Chao-Ming Huang, and Jing-Mei Li. "Anodic Deposition of Vanadium Oxides for Thermal-Induced Growth of Vanadium Oxide Nanowires." Journal of The Electrochemical Society 156, no. 11 (2009): D485. http://dx.doi.org/10.1149/1.3216030.

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26

Du, Tao, Xin Fang, and Xin Pu Zhang. "High Value Added Utilization of Vanadium Slag." Advanced Materials Research 989-994 (July 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.3.

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Vanadium slag is a kind of common furnace slags in the metallurgical field that contains rich vanadium oxides and iron oxides. The high value added utilization of vanadium slag was exploratory studied in this paper. Under the existing experimental conditions, chemical reactions conducted between vanadium slag and concentrated sulfuric acid. Vanadium titanium catalyst was prepared with the lixivium (whose main ingredients were 44.42% of V2O5 and 29.36% of TiO2), which could meet the demand of industrial production; zeolite 4A was prepared creatively with leach residue of vanadium slag for the f

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27

Niehus, Horst, Ralf-Peter Blum, and Dirk Ahlbehrendt. "Structure of Vanadium Oxide (V2O3) Grown on Cu3Au(100)." Surface Review and Letters 10, no. 02n03 (2003): 353–59. http://dx.doi.org/10.1142/s0218625x03004962.

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The epitaxial growth of vanadium oxide (V2O3) has been investigated by scanning tunneling microscopy (STM), low energy ion back-scattering (ISS) and low energy electron diffraction (LEED). Direct evaporation of vanadium onto metal surfaces (Cu, Au or Cu3Au) gives rise to massive surface alloying. The attempt to oxidize the vanadium film by consequent oxygen exposure leads to the formation of rough VO x films of poor quality and mixed valency. A new way of oxide formation has been developed by preoxidation of a Cu3Au substrate, which acts positively in two ways since it prevents completely allo

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28

Thalmeier, P., B. Schmidt, V. Yushankhai, and T. Takimoto. "Frustrated Magnetism in Vanadium Oxides." Acta Physica Polonica A 115, no. 10 (2009): 53–58. http://dx.doi.org/10.12693/aphyspola.115.53.

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29

Chirayil, Thomas, Peter Y. Zavalij, and M. Stanley Whittingham. "Hydrothermal Synthesis of Vanadium Oxides." Chemistry of Materials 10, no. 10 (1998): 2629–40. http://dx.doi.org/10.1021/cm980242m.

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30

WEST, K. "Sodium insertion in vanadium oxides." Solid State Ionics 28-30 (September 1988): 1128–31. http://dx.doi.org/10.1016/0167-2738(88)90343-8.

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31

AGRAWAL, A., S. CHANDRA SHEKAR, R. TOMAR, and S. GUJARATHI. "CATALYTIC DEGRADATION OF ETHYL ACETATE OVER V2O5 SUPPORTED MOLECULAR SIEVES." Latin American Applied Research - An international journal 45, no. 4 (2015): 225–29. http://dx.doi.org/10.52292/j.laar.2015.402.

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Series of V2O5 molecular sieves catalysts with varying vanadium content are prepared by impregnation method. The catalyst composition is determined by AAS, SEM, TPR, XRD and BET Surface area techniques. Ethyl acetate decomposition studies are conducted over V/mol sev catalyst with varying vanadium content in presence of air and ozone in a temperature range of 120 to 180°C. The results reveal that in presence of air the oxidation activity is marginal and the principal oxidation product is ethanol. Whereas in presence of ozone, the oxidation activity is increased significantly, and the primary p

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32

ATREI, A., U. BARDIB, B. CORTIGIANI, and G. ROVIDA. "XPD STUDY OF VANADIUM OXIDE FILMS GROWN ON THE SnO2(110) SURFACE." Surface Review and Letters 06, no. 06 (1999): 1187–93. http://dx.doi.org/10.1142/s0218625x99001323.

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The oxide phases formed upon annealing at 800 K of ultrathin vanadium films deposited on the SnO 2(110) surface have been investigated by XPD and other techniques. We found that the annealing in vacuum of vanadium layers results in the oxidation of the metal carried out by lattice oxygen diffusing from the bulk of SnO 2. The vanadium oxide phase formed in this way is epitaxially oriented with respect to the substrate and is covered by disordered layers of tin oxide. The XPD results rule out the formation of V–Sn mixed oxides. The simulation of the experimental XPD curves with SSC calculations

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33

Guerrero-Pérez, M. "V-Containing Mixed Oxide Catalysts for Reduction–Oxidation-Based Reactions with Environmental Applications: A Short Review." Catalysts 8, no. 11 (2018): 564. http://dx.doi.org/10.3390/catal8110564.

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V-containing mixed oxide catalytic materials are well known as active for partial oxidation reactions. Oxidation reactions are used in industrial chemistry and for the abatement of pollutants. An analysis of the literature in this field during the past few years shows a clear increase in the use of vanadium-based materials as catalysts for environmental applications. The present contribution makes a brief revision of the main applications of vanadium containing mixed oxides in environmental catalysis, analyzing the properties that present the catalysts with a better behavior that, in most case

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34

Ильинский, А. В., та Е. Б. Шадрин. "Электропроводящие свойства окислов ряда Магнели: VO и V-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=-". Физика твердого тела 64, № 6 (2022): 702. http://dx.doi.org/10.21883/ftt.2022.06.52405.289.

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A comparative analysis of the electrically conductive properties of strongly correlated oxides: vanadium oxide VO and vanadium pentoxide V2O5, belonging to opposite ends of the Magneli series, is carried out. It is shown that, despite the radical difference in the symmetry of the crystal lattices of these compounds, these materials have a number of fundamental common properties, the main of which are the dependence of the width of the energy gap (gap band) on the occupation of the conduction band by electrons and the occurrence in both compounds of an electronic Mott transition extended in tem

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35

Schreckenbach, J. P., D. Butte, G. Marx, B. R. Johnson, and W. M. Kriven. "Electrosynthesis and Microstructural Characterization of Anodic VOx Films." Journal of Materials Research 15, no. 7 (2000): 1483–89. http://dx.doi.org/10.1557/jmr.2000.0213.

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Anodic conversion films of vanadium oxides on vanadium were potentiodynamically generated at high voltages in an acetate electrolyte system. The microstructure of the anodic VOx coatings was characterized by surface and solid-state techniques such as scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. An amorphous structure is proposed in which network-forming [VO4] tetrahedra in various degrees of condensation are connected by distorted [VO5] and [VO6] units. Such polyhedra lead to the formation of nanocrystalline phases of

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36

STEFANOVICH, GENRIKH, ANDREY VELICHKO, ALEXANDER PERGAMENT, and PETER BORISKOV. "AMORPHOUS VANADIUM DIOXIDE: THE RESIST FOR ELECTRON-BEAM LITHOGRAPHY." Surface Review and Letters 25, no. 06 (2018): 1850118. http://dx.doi.org/10.1142/s0218625x18501184.

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Amorphous vanadium dioxide, in combination with the resist properties, allowing one to create nanoscale structures, and with the effects of electrical switching and memory, should be in demand by the electronic industry. The opportunity to prepare highly sensitive to electron beam, optical and ion irradiation oxide films of vanadium by vacuum methods allows hope for simplified methods for coating and developing resists based on vanadium oxides. The scope of this review article is indicated by its title, namely, it encompasses the authors’ experimental results and model approximations on electr

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37

Sviridova, Tatyana V. "Solvothermal synthesis of metastable molybdenum, tungsten and vanadium oxides." Journal of the Belarusian State University. Chemistry, no. 1 (March 5, 2020): 32–39. http://dx.doi.org/10.33581/2520-257x-2020-1-32-39.

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It is shown that under the solvothermal conditions the polycondensation of molybdic, tungstic and vanadic oxoacids yields metastable oxide phases (h-MoO3, h-WO3, xerogel-V2O5 of lamellar structure) in the form of microcrystals 2–10 μm in size, while the hydrates of these oxides formed as the by-products exhibiting conversion as the result of recrystallization during the course of further growing. By changing the concentration of the reaction solution it is possible to exert an effective control over the nucleation to obtain the oxide particles of the similar structure and habitus.

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38

Schwarz, Benjamin, Johannes Forster, Montaha H. Anjass, Sven Daboss, Christine Kranz, and Carsten Streb. "From molecular to colloidal manganese vanadium oxides for water oxidation catalysis." Chem. Commun. 53, no. 84 (2017): 11576–79. http://dx.doi.org/10.1039/c7cc06840a.

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39

Batista, C., J. Mendes, Vasco Teixeira, and Joaquim Carneiro. "Reactive DC Magnetron Sputtering of Vanadium Oxide Thin Films." Materials Science Forum 587-588 (June 2008): 343–47. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.343.

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Vanadium oxides are a class of materials with outstanding physical and chemical properties. They find a wide field of technological applications such as optical and electrical switching devices, light detectors, temperature sensors, micro batteries, etc. There are several studies regarding the production of vanadium oxide films by radio-frequency (RF) magnetron sputtering, and with increasing interest on the thermochromic VO2 phase. However, literature with focus on vanadium oxide films deposited by direct current (DC) magnetron sputtering is very limited. In this work, we have successfully de

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40

Benomar, S., A. Chieregato, A. Masso, et al. "Al2O3-Supported W–V–O bronze catalysts for oxidative dehydrogenation of ethane." Catalysis Science & Technology 10, no. 23 (2020): 8064–76. http://dx.doi.org/10.1039/d0cy01220c.

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41

Mitran, Gheorghita, Ioan-Cezar Marcu, Tatiana Yuzhakova, and Ioan Sandulescu. "Selective oxidation of isobutane on V-Mo-O mixed oxide catalysts." Journal of the Serbian Chemical Society 73, no. 1 (2008): 55–64. http://dx.doi.org/10.2298/jsc0801055m.

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Four V-Mo-O mixed metal oxides were prepared, characterized and tested for the selective oxidation of isobutane in the temperature range 350-550?C, at atmospheric pressure. Isobutane was mainly oxidized to isobutene and carbon oxides. The systems with low vanadium contents showed low activities but high isobutene selectivities, while the systems with high vanadium contents showed high activities with high carbon oxides selectivities. The effects of temperature, contact time and the molar ratio iso-butane to oxygen on the conversion of isobutane and the selectivity of the oxidation were studied

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42

Makhotkina, E. S., M. V. Shubina, and I. G. Shubin. "Investigation of Hydrometallurgical Processing of Titanomagnetite Ore Enrichment Waste." Solid State Phenomena 299 (January 2020): 1115–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.1115.

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In the article the negative impact of titano-magnetite ore enrichment waste on the environment and the possibility of its use as vanadium-containing raw materials are overviewed. The chemical and mineralogical composition features of various samples of the Kusinsky deposit titanomagnetite ore tails are presented. Different combinations of their roasting processes (with and without salt additives, with oxides, carbonates, or their compositions) and leaching processes (with water or acid) during hydrometallurgical processing were analyzed.The experiment results on the extraction of vanadium in t

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43

Gupta, Kapil, and Sarvesh Kumar. "STUDY OF THE EFFECT OF ANNEALING AND IRRADIATION OF HIGH ENERGY IONS ON VANADIUM OXIDE THIN FILMS." RASAYAN Journal of Chemistry 15, no. 04 (2022): 2818–21. http://dx.doi.org/10.31788/rjc.2022.1548013.

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Vanadium due to multiple oxidation states (+2 to +5) has various oxides like vanadium dioxide, vanadium pentoxide, and hexavanadium tredecaoxide. Thin films of vanadium oxide have been fabricated using the reactive radio frequency sputtering technique. Deposited films are then annealed in Argon (Ar) environment at 500°C and then irradiated with 100 MeV Ag8+ high-energy ions. The vibrational properties of the thin films have been analyzed by Raman scattering and Fourier transform infrared spectroscopy (FTIR). Results (Raman and FTIR spectra) of the annealed film show that the V6O13 phase is con

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44

Zhu, Quan Yao, Si Ping Hu, Fei Wu, and Wen Chen. "Hydrothermal Synthesis and Electrochemical Study of VO_x/CNTs Composites." Advanced Materials Research 79-82 (August 2009): 1787–90. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1787.

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Vanadium oxide/carbon nanotubes (VOx/CNTs) composites were prepared by sol-gel hydrothermal synthesis. The composites were characterized in terms of surface morphology and structure using SEM, TEM, XRD, FT-IR, respectively. The electrochemical behaviors of the composites were investigated by means of galvanostatic charge-discharge cycling. The result shows that the vanadium oxides nanotubes and carbon nanotubes contacted each other and the composites have great cycleability as well as capacity characteristics which arrived at 303.5 mAh/g in the first discharge process and 200.4 mAh/g after 50t

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45

Polak, Paweł, Jan Jamroz, and Tomasz K. Pietrzak. "Observation of Metal–Insulator Transition (MIT) in Vanadium Oxides V2O3 and VO2 in XRD, DSC and DC Experiments." Crystals 13, no. 9 (2023): 1299. http://dx.doi.org/10.3390/cryst13091299.

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Due to metal–insulator transitions occurring in those compounds, materials and devices based on vanadium (III) and (IV) oxides draw increasing scientific attention. In this paper, we observed the transitions in both oxides using contemporary laboratory equipment. Changes in the crystallographic structure were precisely investigated as a function of the temperature with a step of 2 °C. Thermal effects during transitions were observed using differential scanning calorimetry. The DC conductivity of the materials was measured quasi-continuously as a function of the temperature. All the experiments

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ECUCHI, Mika, Fumihiko MAKI, Hatomi KIMURA, Kazuhiro TAKAHASHI, and Yoshihiro MOMOSE. "Lithiation Behaviour of Vanadium Molybdenum Oxides." Electrochemistry 68, no. 6 (2000): 474–77. http://dx.doi.org/10.5796/electrochemistry.68.474.

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47

Livage, Jacques. "Hydrothermal Synthesis of Nanostructured Vanadium Oxides." Materials 3, no. 8 (2010): 4175–95. http://dx.doi.org/10.3390/ma3084175.

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Shimizu, Y., H. Takeda, M. Tanaka, et al. "Anisotropic hyperfine coupling in vanadium oxides." Journal of Physics: Conference Series 273 (January 1, 2011): 012128. http://dx.doi.org/10.1088/1742-6596/273/1/012128.

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Jin-no, Taka, Satoshi Aoyama, Yasuhiro Shimizu, Masayuki Itoh, and Yutaka Ueda. "3dElectron Quadrupole Moments in Vanadium Oxides." Journal of Physics: Conference Series 400, no. 3 (2012): 032084. http://dx.doi.org/10.1088/1742-6596/400/3/032084.

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50

Shiozaki, Ikuyo. "Magnetic property of vanadium-molybdenum oxides." Journal of Magnetism and Magnetic Materials 177-181 (January 1998): 261–62. http://dx.doi.org/10.1016/s0304-8853(97)00977-3.

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