2006
DOI: 10.3952/lithjphys.46201
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Sol-gel synthesis and XPS characterization of vanadium oxide bronzes

Abstract: The results of synthesis of the vanadium oxide bronzes NaV2O5, K4.3V6O16.2, and Rb4.4V6O16.1 are presented. The synthesis process can be described by three steps: the 1st -production of the sol by dissolving the necessary materials in H2O2 solution, the 2nd -fabrication of the gel by heating up to 350 K, and the 3rd -heating up to 580-780 K for the water removal from the gel. The chemical composition of obtained bronzes was examined by using X-ray photoelectron spectroscopy (XPS) method.

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Cited by 5 publications
(2 citation statements)
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“…In the last case the additional increase of the reduction ratio RR = C 4 /(C 4 + C 5 ) (C i is the atomic concentration of the i-valence ion) may be roughly estimated from the nominal chemical formulae, assuming that RR is the same for the basic V 2 O 5 layers and additional V 4+ ions from (VO) 2+ species; (2) by varying the concentration of V 4+ ions by some external treatment (thermal [44], UV irradiation [45], ion or electron bombardment [39,46]) and comparing photoelectron spectra before and after the treatment. The advantage of this technique is that the same sample is used to study the comparison spectra; therefore the structure-related effects may be neglected.…”
Section: The Aim Of Workmentioning
confidence: 99%
“…In the last case the additional increase of the reduction ratio RR = C 4 /(C 4 + C 5 ) (C i is the atomic concentration of the i-valence ion) may be roughly estimated from the nominal chemical formulae, assuming that RR is the same for the basic V 2 O 5 layers and additional V 4+ ions from (VO) 2+ species; (2) by varying the concentration of V 4+ ions by some external treatment (thermal [44], UV irradiation [45], ion or electron bombardment [39,46]) and comparing photoelectron spectra before and after the treatment. The advantage of this technique is that the same sample is used to study the comparison spectra; therefore the structure-related effects may be neglected.…”
Section: The Aim Of Workmentioning
confidence: 99%
“…Research results of X-ray photoelectron spectra of xerogels are described in [46][47][48][49][50][51][52][53][54]. It is known that this method allows determining the valence states of ions.…”
Section: X-ray Photoelectron Spectramentioning
confidence: 99%