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Su, Dang Sheng; Wieske, Martin; Beckmann, E.; Blume, Andreas; Mestl, Gerhard; Schlögl, Robert

doi:10.1023/a:1016754922933

Cited by 76 publications

(57 citation statements)

References 13 publications

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“…The shape of the vanadium and oxygen edges is strongly related to the oxidation state of the vanadium and to the distortion of the coordination polyhedra. 19 EELS measurements were performed in the energy region of the V L 2,3 and the oxygen K ionization edges. A recorded spectrum is presented in Fig.…”

Section: O-k Elnes and V-k Nexafsmentioning

confidence: 99%

Electronic structure ofβ−VOPO4

Willinger

Schlögl

2005

Phys. Rev. B

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Vanadium phosphorus oxides are used as catalysts in the selective oxidation of n-butane to maleic anhydride. The working catalyst comprises besides the main pyrophosphate phase in which the vanadium is in a 4+ oxidation state also a, predominantly preparation dependent, amount of different pentavalent vanadylorthophosphate phases. In order to elucidate the role of the pentavalent phases it is necessary to investigate them in detail. The present work reports the synthesis, characterization and a detailed investigation of the electronic structure of bulk ␤-VOPO 4 in company with simulated and experimental core-shell excitation spectra.

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Section: O-k Elnes and V-k Nexafsmentioning

confidence: 99%

Electronic structure ofβ−VOPO4

Willinger

Schlögl

2005

Phys. Rev. B

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“…Note that structure in the disordered areas looks rather sharp, not diffuse or faint. We [8] observed the transformation of the sharp 110-lattice fringes of pure V 2 O 5 into faint and diffuse fringes simultaneously with a change of their spacing when studying the effect of the radiation damage on the structure of vanadium pentoxide. These transformations took place after 10 min of the oxide irradiation by electron beam in the electron microscope column.…”

Section: Resultsmentioning

confidence: 91%

Synthesis and characterization of the titanium doped nanostructural V2O5

Kryukova

Зенковец

Pfänder

et al. 2003

Materials Science and Engineering: A

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Using scanning and analytical transmission electron microscopies (TEM), the morphology and structure of nanostructurally assembled V 2 O 5 doped with Ti has been studied. It was found that the bulk structure of the oxide particles crystallized in rod-like shape is of the V 2 O 5 type whereas Ti atoms are located mainly on the thin surface layer of the rods. Such surface coating is nonuniform and contains up to 3 at.% of titanium. Modification of the oxide sample with titanium atoms seems to stabilize the V 2 O 5 structure against electron beam irradiation.

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“…Observation conditions were carefully adjusted in order to avoid electron-beam-induced structural transformations. 19 Nanostructures were released from the substrates by sonicating the samples in ethanol. Drops of the nanostructure solution were then deposited on holey carbon-coated TEM grids.…”

Section: Methodsmentioning

confidence: 99%

Structural and cathodoluminescence assessment of V2O5 nanowires and nanotips grown by thermal deposition

Dı́az-Guerra

Piqueras

2007

Journal of Applied Physics

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V 2 O 5 nanostructures have been grown on 4H-SiC and Si substrates by a thermal deposition method without a catalyst. High aspect ratio nanowires with rectangular cross sections were grown on 4H-SiC. High-resolution transmission electron microscopy observations and cathodoluminescence ͑CL͒ spectroscopy measurements reveal the high crystal quality of the grown nanowires. Deposition on Si substrates leads to the growth of V 2 O 5 platelets or rod-shaped crystals ending in arrays of parallel sharp nanotips with apex radius in the 50 nm range. A CL emission band observed centered at about 1.70 eV in spectra from these nanostructures is tentatively attributed to defect centers involving oxygen vacancies.

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Cited by 76 publications

References 13 publications

Electronic structure ofβ−VOPO4

Electronic structure ofβ−VOPO4

Synthesis and characterization of the titanium doped nanostructural V2O5

Structural and cathodoluminescence assessment of V2O5 nanowires and nanotips grown by thermal deposition

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