α-Form of sodium metavanadate

Μarumo, F.; Isobe, M.; Iwai, Shigeru; Kondo, Yoshiaki

doi:10.1107/s0567740874005450

Cited by 51 publications

(25 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The position of this band indicates the presence of polymerized VO 4 , but its contribution to the total intensity is small. This assignment is supported by comparison with meta-vanadate reference compounds with polymerized VO 4 such as Na 3 VO 3 [33] and NH 4 VO 3 [34], which show absorption bands at 353 and 363 nm, respectively.…”

Section: Synthesis Of Vo X /Sba-15mentioning

confidence: 57%

Partial Oxidation of Methanol Over Highly Dispersed Vanadia Supported on Silica SBA-15

et al. 2005

View full text Add to dashboard Cite

The partial oxidation of methanol to formaldehyde (FA) was studied over highly dispersed vanadia supported on mesoporous silica SBA-15 (VO x /SBA-15). VO x /SBA-15 catalysts were prepared by a novel grafting/ion-exchange method and characterized using UV-VIS-and Raman spectroscopy. The resulting surface vanadium oxide species (0-2.3 V/nm 2 ), grafted on the inner pores of the SBA-15 silica matrix, consist of tetrahedrally coordinated monomeric and polymeric vanadia. The VO x /SBA-15 catalysts are active and highly selective for the production of FA between 300 and 400°C. Comparison of the reactivity results with literature data reveals that a better catalytic performance can be obtained over vanadia supported on mesoporous silica in comparison with conventional silica samples with the same vanadium loading. Raman characterization of the catalyst after reaction at high conversion indicates that dispersed vanadia partly agglomerates into vanadia crystallites during methanol oxidation.

show abstract

Section: Synthesis Of Vo X /Sba-15mentioning

confidence: 57%

Partial Oxidation of Methanol Over Highly Dispersed Vanadia Supported on Silica SBA-15

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The formation of amorphous KVO 3 clusters has been reported in K-ion-doped V 2 O 5 /TiO 2 [9,27]. The molecular structure of sodium metavanadate, NaVO 3 , consists of cornersharing tetrahedral VO 4 chains with two V-O distances, socalled metavanadate chains [28], and the Raman spectra of NH 4 VO 3 , NaVO 3 , KVO 3 , and RbVO 3 were almost same. It is noted that even in the case of Rb-3.5VA catalyst, a trace of peaks due to metavanadate chains was detected.…”

Section: Resultsmentioning

confidence: 95%

Effect of alkali-ion-doping on the local structure and the photocatalytic properties of alumina-supported vanadium oxides

2007

View full text Add to dashboard Cite

“…Such corner-linked chains bear interesting structural flexibility and hence they crystallize in various structural modifications depending on the temperature, pressure and preparation conditions [8][9][10]. There are several reports dealing with the crystal structure and the ferro or pyroelectric properties of various alkali or mixed metal metavanadate available in literature [4,5,[11][12][13].…”

Section: Introductionmentioning

confidence: 97%