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In situ XRD and Raman study of the phase transition in V2O5 xerogels.

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Title: In situ XRD and Raman study of the phase transition in V2O5 xerogels.
Authors: Shvets, Petr1 (AUTHOR) pshvets@kantiana.ru, Maksimova, Ksenia1 (AUTHOR), Goikhman, Aleksandr1 (AUTHOR)
Source: Journal of Non-Crystalline Solids. Feb2024, Vol. 625, pN.PAG-N.PAG. 1p.
Subjects: Phase transitions, X-ray diffraction, Vanadium oxide, Xerogels, Raman spectroscopy
Abstract: • Vanadium oxide xerogel can exist in two phases with different atomic arrangements. • Low-temperature phase has a special atomic arrangement with V 2 O 5 bilayers. • High-temperature phase (HTP) is closely related to α-V 2 O 5 crystals. • HTP can be stabilized in ambient when amorphous vanadium oxide reacts with water. • This reaction led to erroneous assignments for different materials, including δ-V 2 O 5. Vanadium oxide xerogel samples (V 2 O 5 ∙nH 2 O) were successfully synthesized using a liquid phase reaction between α-V 2 O 5 and H 2 O 2 , as well as through the interaction of amorphous V 2 O 5 films with atmospheric water. The samples were systematically investigated by X-ray diffraction and Raman spectroscopy. Temperature-dependent studies confirmed the existence of two distinct phases. Depending on synthesis and processing protocols, either phase can be stabilized in ambient conditions. It was proved that the formation of a high-temperature phase from amorphous vanadium oxide previously led to some misinterpretations associated with the high-pressure δ-V 2 O 5 polymorph. While current structural models of vanadium oxide xerogel provide some insights, our findings underscore the exciting potential for refining and expanding these models in future research endeavors. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 174447445
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PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: In situ XRD and Raman study of the phase transition in V2O5 xerogels.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Shvets%2C+Petr%22">Shvets, Petr</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pshvets@kantiana.ru</i><br /><searchLink fieldCode="AR" term="%22Maksimova%2C+Ksenia%22">Maksimova, Ksenia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Goikhman%2C+Aleksandr%22">Goikhman, Aleksandr</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Non-Crystalline+Solids%22">Journal of Non-Crystalline Solids</searchLink>. Feb2024, Vol. 625, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadium+oxide%22">Vanadium oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Xerogels%22">Xerogels</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+spectroscopy%22">Raman spectroscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Vanadium oxide xerogel can exist in two phases with different atomic arrangements. • Low-temperature phase has a special atomic arrangement with V 2 O 5 bilayers. • High-temperature phase (HTP) is closely related to α-V 2 O 5 crystals. • HTP can be stabilized in ambient when amorphous vanadium oxide reacts with water. • This reaction led to erroneous assignments for different materials, including δ-V 2 O 5. Vanadium oxide xerogel samples (V 2 O 5 ∙nH 2 O) were successfully synthesized using a liquid phase reaction between α-V 2 O 5 and H 2 O 2 , as well as through the interaction of amorphous V 2 O 5 films with atmospheric water. The samples were systematically investigated by X-ray diffraction and Raman spectroscopy. Temperature-dependent studies confirmed the existence of two distinct phases. Depending on synthesis and processing protocols, either phase can be stabilized in ambient conditions. It was proved that the formation of a high-temperature phase from amorphous vanadium oxide previously led to some misinterpretations associated with the high-pressure δ-V 2 O 5 polymorph. While current structural models of vanadium oxide xerogel provide some insights, our findings underscore the exciting potential for refining and expanding these models in future research endeavors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jnoncrysol.2023.122751
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Phase transitions
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
      – SubjectFull: Vanadium oxide
        Type: general
      – SubjectFull: Xerogels
        Type: general
      – SubjectFull: Raman spectroscopy
        Type: general
    Titles:
      – TitleFull: In situ XRD and Raman study of the phase transition in V2O5 xerogels.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Shvets, Petr
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          Name:
            NameFull: Maksimova, Ksenia
      – PersonEntity:
          Name:
            NameFull: Goikhman, Aleksandr
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          Dates:
            – D: 01
              M: 02
              Text: Feb2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 00223093
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            – Type: volume
              Value: 625
          Titles:
            – TitleFull: Journal of Non-Crystalline Solids
              Type: main
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