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

Synthesis and visible-light photocatalytic activity of NdVO4 nanowires

“…Thus, the VO 4 tetrahedra interact strongly with each other along the VO 4 chains. The high photocatalytic activity in NdVO 4 nanowires is observed partly due to the presence of regular VO 4 tetrahedra and the layered structure, both of which are beneficial for the charge transfer to the surface [15,26,27]. The UV-vis spectrum shows that Nd 3+ can absorb visible light energy effectively for 4f electron transition.…”

Effect of Sodium on the Catalytic Properties of VOx/CeO2 Catalysts for Oxidative Dehydrogenation of Methanol

“…Similar phenomena have also been reported in a UV−vis study on VO x upon alkali addition which showed a blue-shift of the energy gap of alkalimodified catalysts. 29,46,47 Third, a new VO feature at ∼970 cm −1 develops and its intensity increases with the Na/V ratio (from 0.25 to 0.75). For 1 Na-VO x /CeO 2 , only one VO mode is observed at ∼985 cm −1 .…”

Supported monomeric vanadium catalyst for dehydration of amides to form nitriles

“…These results revealed that the vanadium species on the HT surface is located as a monomeric vanadium species with tetrahedral coordination similar to that in Na 3 VO 4 . 8 The proposed structure of the vanadium species was also confirmed by UV-vis diffuse reflectance spectra of V/HT; the charge-transfer band at 300 nm was assigned to a monomeric VO 4 tetrahedral species (Fig. S3, ESIw).…”