vanadium pentoxide reduction

vanadium pentoxide reduction

(PDF) On the carbonitrothermic reduction of

Synthesis of High-Quality FeV55N Alloy by Carbonitrothermic Reduction of Vanadium Pentoxide–Ferric Oxide Mixture

Thermal reduction of vanadium pentoxide: an XPD

1999-8-2  In the framework of a research program on V 2 O 5 based catalysts, thermal reduction of V 2 O 5 (001) is investigated by means of X-ray photoelectron diffraction (XPD). Vanadium pentoxide is a well-known semi-conductor catalyst.

On the carbonitrothermic reduction of vanadium

Vanadium nitride was prepared by heating a mixture of vanadium pentoxide and graphite powder under a flowing nitrogen atmosphere. The resultant nitride was evaluated by powder X-ray diffraction and chemical analysis. The effects of various experimental parameters, such as oxide-to-carbon ratio, nitrogen flow rate, nitriding temperature and time, compacting pressure, etc., on the extent of ...

Electrochemical reduction and re-oxidation of

1978-7-1  Electrochemical reduction and re-oxidation processes of the vanadium pentoxide (V/sub 2/O/sub 5/) surface were investigated mainly by cyclic chronopotentiometry in acid solutions of pH 0 -- 4, using Li-doped single crystal electrodes ..cap alpha..-Li sub(x)V/sub 2/O/sub 5/ (x = 0 -- 0.04).

Vanadium pentoxide - Organic Chemistry

Vanadium pentoxide melts at 690°C and decomposes at 1750°C. V 3+ is a strong reducing agent, which sets hydrogen free with water. This shows that Vanadium pentoxide may only rarely be applicable as sole oxidizing agent. Of interest are its abilities to form polyoxides.

Vanadium pentoxide V2O5 - PubChem

Vanadium pentoxide released to air will be in or on particles that eventually fall to the ground. Vanadium pentoxide will not move into air from moist soil and water surfaces. Vanadium pentoxide can dissolve in water to form ions or bind to soil particles; this will dictate its movement through soil.

Vanadium pentoxide: Synthesis and characterization

2009-4-15  The ability of vanadium atoms to exist in multiple stable oxidation states results in the easy conversion between oxides of different stoichiometry by oxidation or reduction and is believed to be an important factor for the oxide to function as a catalyst in selective oxidation.

A Facile Formation of Vanadium(0) by the Reduction

Abstract The reduction of V2O5 to vanadium metal(0), that requires severe conditions in conventional reduction methods, ... A Facile Formation of Vanadium(0) by the Reduction of Vanadium Pentoxide Pelletized with Magnesium Oxide Enabled by Microwave Irradiation. Naomi Inazu.

VANADIUM - chemguide

2015-6-18  The sulphur dioxide is oxidised to sulphur trioxide by the vanadium(V) oxide. In the process, the vanadium(V) oxide is reduced to vanadium(IV) oxide. The vanadium(IV) oxide is then re-oxidised by the oxygen. Although the catalyst has been temporarily changed during the reaction, at the end it is chemically the same as it started.

A Facile Formation of Vanadium(0) by the Reduction

The reduction of V 2 O 5 to vanadium metal (0), that requires severe conditions in conventional reduction methods, was enabled to be proceeded in a short time of 1 h at 1273 K by the reaction with magnesium vapor with the isolation yield of V (0) in 55.6% by using microwave irradiation of 820 W.

Thermal reduction of vanadium pentoxide: an XPD

1999-8-2  In the framework of a research program on V 2 O 5 based catalysts, thermal reduction of V 2 O 5 (001) is investigated by means of X-ray photoelectron diffraction (XPD). Vanadium pentoxide is a well-known semi-conductor catalyst. Fig. 1 shows the layered V 2 O 5 structure .V 2 O 5 was previously characterized by means of XPD in combination with single scattering calculations .

On the carbonitrothermic reduction of vanadium

Vanadium nitride was prepared by heating a mixture of vanadium pentoxide and graphite powder under a flowing nitrogen atmosphere. The resultant nitride was evaluated by powder X-ray diffraction and chemical analysis. The effects of various experimental parameters, such as oxide-to-carbon ratio, nitrogen flow rate, nitriding temperature and time, compacting pressure, etc., on the extent of ...

Electrochemical reduction and re-oxidation of

Electrochemical reduction and re-oxidation processes of the vanadium pentoxide (V/sub 2/O/sub 5/) surface were investigated mainly by cyclic chronopotentiometry in acid solutions of pH 0 -- 4, using Li-doped single crystal electrodes ..cap alpha..-Li sub(x)V/sub 2/O/sub 5/ (x = 0 -- 0.04).

Microbial Reduction and Precipitation of Vanadium by ...

Shewanella oneidensis couples anaerobic oxidation of lactate, formate, and pyruvate to the reduction of vanadium pentoxide (VV). The bacterium reduces VV (vanadate ion) to VIV (vanadyl ion) in an anaerobic atmosphere. The resulting vanadyl ion precipitates as a VIV-containing solid.

Enhanced Electrochromic Performance of Vanadium

2016-8-3  Vanadium pentoxide/reduced graphene oxide (V 2 O 5 /rGO) nanocomposite film was fabricated by a facial sol–gel method. X-ray diffraction demonstrated that the interlayer distance of V 2 O 5 increased from 1.05 to 1.36 nm due to the introduction of rGO. Raman spectra confirmed the co-existence of V 2 O 5 and rGO in the V 2 O 5 /rGO nanocomposite film. Scanning electron microscopy

(PDF) Microbial Reduction and Precipitation of

Shewanella oneidensis couples anaerobic oxidation of lactate, formate, and pyruvate to the reduction of vanadium pentoxide (V(V)). The bacterium reduces V(V) (vanadate ion) to V(IV) (vanadyl ion ...

A Facile Formation of Vanadium(0) by the Reduction

Abstract The reduction of V2O5 to vanadium metal(0), that requires severe conditions in conventional reduction methods, ... A Facile Formation of Vanadium(0) by the Reduction of Vanadium Pentoxide Pelletized with Magnesium Oxide Enabled by Microwave Irradiation. Naomi Inazu.

Open aluminothermic reduction of vanadium oxides ...

1972-5-1  Aluminothermic reduction The raw materials utilised in this investigation included vanadium pentoxide ( - 200 mesh, supplier's analyseszOs, 99% ; SiO:,, 0.35% ; Al^, 0.05% ; P, 0.01% * The paper presents a part of the M.Sc. (Tech) thesis to be submitted by Mr. Mukherjee to the Univers- ity of Bombay, India. J.

Vanadium pentoxide - Organic Chemistry

Vanadium pentoxide, Vanadium compounds. Vanadium pentoxide is used in different, industrial processes as catalyst: In the contact process it serves for the oxidation of SO 2 to SO 3 with oxygen at 440°C. Besides it is used in the oxidation of ethanol to ethanale and in the production of phthalic anydride, polyamide, oxalic acid and further products.

Microbial reduction and precipitation of vanadium by ...

Microbial reduction and precipitation of vanadium by Shewanella oneidensis. Carpentier W(1), Sandra K, De Smet I, Brigé A, De Smet L, Van Beeumen J. Author information: (1)Laboratory for Protein Biochemistry and Protein Engineering, Flanders Interuniversity Institute for Biotechnology, B

On the carbonitrothermic reduction of vanadium

Vanadium nitride was prepared by heating a mixture of vanadium pentoxide and graphite powder under a flowing nitrogen atmosphere. The resultant nitride was evaluated by powder X-ray diffraction and chemical analysis. The effects of various experimental parameters, such as oxide-to-carbon ratio, nitrogen flow rate, nitriding temperature and time, compacting pressure, etc., on the extent of ...

Microbial Reduction and Precipitation of Vanadium by ...

Shewanella oneidensis couples anaerobic oxidation of lactate, formate, and pyruvate to the reduction of vanadium pentoxide (VV). The bacterium reduces VV (vanadate ion) to VIV (vanadyl ion) in an anaerobic atmosphere. The resulting vanadyl ion precipitates as a VIV-containing solid.

A Facile Formation of Vanadium(0) by the Reduction

Abstract The reduction of V2O5 to vanadium metal(0), that requires severe conditions in conventional reduction methods, ... A Facile Formation of Vanadium(0) by the Reduction of Vanadium Pentoxide Pelletized with Magnesium Oxide Enabled by Microwave Irradiation. Naomi Inazu.

(PDF) Microbial Reduction and Precipitation of

Shewanella oneidensis couples anaerobic oxidation of lactate, formate, and pyruvate to the reduction of vanadium pentoxide (V(V)). The bacterium reduces V(V) (vanadate ion) to V(IV) (vanadyl ion ...

Vanadium Pentoxide Scientific.Net

Abstract: Keywords: vanadium pentoxide;carbon black;reduction and nitridation;vanadium nitrogen alloy. Abstract. The V 2 O 5 extracted from low vanadium shale and carbon black are used as raw materials to prepare briquetting samples through mixing, grinding and pressing. The samples are prereduced, final reduced and nitrated to produce vanadium nitrogen alloy with high nitrogen content.

US9525164B1 - Method of reducing vanadium

A method for producing pure vanadium(III) oxide and a vanadyl sulfate solution comprising contacting vanadium pentoxide with a solid inorganic reducing agent. The resultant mixture containing a mix of vanadium oxides is leached with sulfuric acid to form vanadium(III) oxide and vanadyl sulfate.

Vanadium pentoxide nanoparticles based saturable

Vanadium pentoxide (V 2 O 5 ) nanoparticles were synthesized by solution combustion method. The particle size reduction of the as-synthesized sample was achieved through ball milling. The as-synthesized and the ball milled samples were further characterized using XRD, TEM, EDX, UV-Visible and FTIR spectroscopy. Open-aperture z-scan technique was employed to study the nonlinear optical

Vanadium Chemistry Fandom

2021-4-24  Reduction of vanadium pentoxide with calcium gives pure vanadium. An alternative suitable for small scales is the reduction of vanadium pentachloride VCl 5 with hydrogen or magnesium. Many other methods are also in use. Industrially, most vanadium is used as an additive to improve steels.

Preparation of vanadium metal - Iowa State University

2020-10-13  lower oxide, which escaped further reduction by alloying it­ self with the metallic vanadium, fhe substitution of vanadium trioxid© for the pentoxide gave no better metalj and the replacement of vanadium trisulfide for V2O5 gave no reaction at all C53)• Yet, by the aluwinuro reduction of unfused, dry

Vanadium biarasa

2021-4-12  Ferrovanadium is a master alloy with a vanadium content of at least 50% produced by reduction of the raw materials with carbon or aluminium. The high affinity of vanadium for carbon leads to carbide formation, so that carbothermic reduction can only be used when there is no requirement for vanadium with low carbon content.The reaction of V 2 O 5 with aluminium is self-sustaining and the ...