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Showing 1 to 20 of 39 for “"V2O5"”.
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Growth of V2O5 films for electrochromic and battery applications
Vanadium pentoxide (V2O5) is an electrochromic material. Research into electrochromic devices has become more popular with the renewed interest in environmentally-friendly ‘green’ technologies. Particular interest is in the production of electrochromic coated windows for energy saving purposes. …
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Electronic, thermoelectric and optical properties of vanadium oxides: VO2, V2O3 and V2O5
Correlated electrons in vanadium oxides are responsible for their extreme sensitivity to external stimuli such as pressure, temperature or doping. As a result, several vanadium oxides undergo insulator-to-metal phase transition (IMT) accompanied by structural change. Unlike vanadium pentoxide …
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Von molekularen Precursoren zu Oxidphasen im System V2O5 / Nb2O5. Darstellung, Eigenschaften, katalytische Aktivität
… Below this temperature, solid solutions of V2O5 in TT- or M-Nb2O5 exist. Conventionally, pure VNbO5 is not obtainable. Some sol-gel synthesized products have the advantage of a more complete phase formation. In this way, a new phase of composition VNb9O25 can be found. The phase is …
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A Study Of Structure-Property Correlation In V2o5 And Tio2 Based Thin Films As Functional Materials
… <p>A STUDY OF STRUCTURE-PROPERTY CORRELATION IN V2O5 AND TiO2 BASED THIN FILMS AS FUNCTIONAL MATERIALS</p> <p>by</p> <p>CHANDRA THAPA</p> <p>June 2010</p> <p>Advisor: Dr. Ratna Naik</p> <p>Co-Advisor: Dr. K. R. Padmanabhan</p> <p>Major: Physics (Condensed Matter)</p> <p>Degree: Doctor of …
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Propriétés optiques et électrochromes des couches minces de wo3 et de wo3-v2o5 déposés par évaporation thermique spontanée
Le trioxyde de tungstène (WO 3) est un oxyde de métal de transition (TMO) très connu présentant une coloration électrochrome (EC) qui se situe commodément dans la région spectrale solaire. Cette coloration réversible peut être induite sous une forme pratique par la fabrication de dispositifs EC à …
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DEVELOPMENT OF NANO-STRUCTURED METAL OXIDES/GRAPHENE FOR ENERGY APPLICATIONS
… work centered on the investigation of V2O5 and LiFePO4 as the cathode materials for Li-ion batteries. The first part is about the investigation of structure evolution of vanadium oxide (V2O5) nanocrystals during the Li+ ion intercalation and deintercalation processes using in operando …
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DEVELOPMENT OF NANO-STRUCTURED METAL OXIDES/GRAPHENE FOR ENERGY APPLICATIONS
… work centered on the investigation of V2O5 and LiFePO4 as the cathode materials for Li-ion batteries. The first part is about the investigation of structure evolution of vanadium oxide (V2O5) nanocrystals during the Li+ ion intercalation and deintercalation processes using in operando …
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Étude électrochrome des couches minces du pentoxyde de vanadium (V2O5) en vue de leur utilisation dans les dispositifs électrochromes
Les matériaux électrochromes, qui présentent une modification réversible de leurs propriétés optiques lors de l'insertion et de l'extraction de certaines espèces d'ions et d'électrons, présentent un intérêt du point de vue de certaines applications, notamment les fenêtres intelligentes et les …
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Photoelektronenspektroskopische Untersuchungen an Mischoxidkatalysatoren
… lag jedoch auf phosphorpromotierten V2O5/TiO2-Katalysatoren zur Herstellung von Phthalsäureanhydrid (PSA) aus o-Xylol. Das Hauptinteresse lag dabei neben dem Einfluss der verschiedenen Präparationsmethoden auf der Beeinflussung des Systems V2O5/TiO2 durch Phosphor als Promotor. Als …
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Catalytic oxidation of cresols using molecular ozone
… Metal (Ni, Fe, Mn, V) loaded γ-Al2O3, SiO2 and V2O5 catalysts were synthesized by wet impregnation method. These catalysts were further calcined (300 oC) in air and characterized using powder X-ray diffraction (XRD), Fourier Transform-Infrared (FT-IR), inductively coupled plasma-optical emission …
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Electrodeposited macroporous vanadium oxide Li-ion battery materials
… growth mode to form 3D porous crystalline V2O5 after removal of a colloid photonic crystal template of self-assembled polystyrene spheres. We show that at high charge and discharge rates, charge storage in macroporous electrode materials can be completely suppressed, and then entirely …
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ATOMIC LAYER DEPOSITION OF ALKALI PHOSPHORUS OXYNITRIDE ELECTROLYTES FOR BEYOND-LITHIUM NANOSCALE BATTERIES
… battery configurations comprised of a V2O5 cathode and Na metal anode. Electrochemical analysis suggests intermixing of the NaPON/V2O5 layers during the ALD NaPON deposition, and further reaction during the Na metal evaporation step. The reaction during the ALD NaPON deposition on V2O5 …
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Études électro-optiques des couches préparées par la méthode sol-gel
Deux matériaux électrochromes (WO3 et V2O5) ont été préparés par la méthode sol-gel en utilisant des précurseurs organo-métalliques. Les propriétés optiques, électrochromes et électrochimiques des matériaux ont été caractérisées par les mesures de spectrométrie, de spectroscopie de Transformée de …
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Phosphor-modifizierte Katalysatoren zur PSA-Herstellung
… reine Trägeroxid und auf das Katalysatorsystem V2O5/TiO2. Zu Beginn wurde ein kontaminationsarmes Trägeroxid in der Anatasmodifikation hergestellt. Für die TiO2-getragenen Vanadiumoxide wurden unabhängig von der Art der Syntheseroute die thermodynamisch stabilsten Strukturen erhalten. Außer …
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Band engineering of metal oxide heterostructures for catalysis applications
… of mechanical support and large surface area. V2O5 supported on TiO2 is an example of a catalyst that is widely used, where the synergy between the support and the overlayer is taken advantage of. The support effect has often been ascribed to the electronegativity of the support cation which …
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The influence of molybdenum and vanadium on the activity and selectivity of a cobalt Fischer-Tropsch catalyst
… on the selectivity by using commercial MoO3 and V2O5 supports, and alumina support was modified with molybdenum and vanadium in an attempt to create molybdenum and vanadium oxide layer covering the alumina surface.
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Elektronen-Energieverlustspektroskopie von quasi-eindimensionalen Kupraten und Vanadaten
… loss function of Li2CuO2, CuGeO3, V2O5 and NaV2O5. The comparison between the experimental data and the results from bandstructure as well as cluster calculations allows an explanation of the mobility and correlations of the electrons in these systems. The investigation of the …
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Hot corrosion behaviour of new candidates for thermal barrier coatings application in turbine simulated environments
… in the presence of molten mixture of Na2SO4 + V2O5 at 1100˚C were tested. Hot corrosion results show that orthorhombic zirconium-tantalum oxide is more stable, both thermally and chemically in Na2SO4+V2O5 media at 1100˚C, and shows a better hot corrosion resistance than the tetragonal phase. …
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Fine Particle and Mercury Formation and Control during Coal Combustion
… combustion by injection of Vanadium Pentoxide (V2O5), and (3) submicrometer particle formation during oxy-coal combustion.</p><p>Part. 1. While the characterization and formation of the mineral matter component of aerosol during coal combustion has been well studied and understood, the …
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Μερική οξείδωση μεθανίου σε φορμαλδεΰδη σε αντιδραστήρα ανακύκλωσης με διαχωρισμό προϊόντων
… νερό. Ο καταλύτης που χρησιμοποιήθηκε ήταν 1.3% V2O5/SiO2. Το σύστημα μπορούσε να λειτουργήσει κατά δύο διαφορετικούς τρόπους, με ή χωρίς ανακύκλωση και διαχωρισμό των προϊόντων. Κατά την λειτουργία μονής διάβασης του συστήματος (χωρίς ανακύκλωση και διαχωρισμό των προϊόντων) η απόδοση προς …
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