View in EDS

Phase Transformations, Microstructural Effects, and Photocatalytic Activity of Tungsten Trioxide‐Geopolymer Composites.

Saved in:
Bibliographic Details
Title: Phase Transformations, Microstructural Effects, and Photocatalytic Activity of Tungsten Trioxide‐Geopolymer Composites.
Authors: Wilson, Jamie1,2 (AUTHOR) jtw57@bath.ac.uk, Ke, Xinyuan1,3 (AUTHOR), Maskell, Daniel1,3 (AUTHOR), Ball, Richard J.1,2 (AUTHOR)
Source: Journal of the American Ceramic Society. Mar2026, Vol. 109 Issue 3, p1-18. 18p.
Subjects: Photocatalysts, Tungsten trioxide, Microstructure, Phase transitions, Environmental remediation, Air pollution, Composite materials, Water pollution
Abstract: Water and air pollution are pervasive issues, impacting the majority of global citizens. In response, geopolymers functionalized with photocatalytic metal oxides have emerged as sustainable materials for environmental remediation. This study examines how the Si/Al molar ratio (1 and 2) and photocatalytic WO3 loading (WO3/Al molar ratios of 0.10, 0.15, and 0.20) impact the microstructural, optical, and photocatalytic properties of WO3‐geopolymer composites. XRD analysis showed the complete conversion of WO3 into Na2WO4, impairing the intended photocatalytic function under visible light. Solid‐state 27Al NMR showed incomplete geopolymerization, owing to NaOH consumption due to the Na2WO4 conversion. With WO3 loading, the BET surface for the Si/Al = 1 series stabilized at ∼ 11.7 m2/g after a significant initial decline; whereas the Si/Al = 2 series showed a substantial initial reduction and further reductions from 14.5 to 2.5 m2/g. The photocatalytic activity was evaluated by the decolorization of aqueous methylene blue (160 mg/L) and degradation of gaseous α‐pinene (1 ppm) under UV irradiation. The Si/Al = 1 series showed increased decolorization with WO3 loading, whereas the Si/Al = 2 series showed a decrease. Surprisingly, the pristine samples with no WO3 addition outperformed the WO3‐geopolymers in both series, as assessed by the decolorization of methylene blue, attributed to naturally occurring photocatalysts within the metakaolin feedstock and a larger surface area. This shows that the photocatalytic performance of geopolymers is not solely dependent on external photocatalytic WO3 loading but governed by the underlying geopolymer chemistry and network connectivity. These findings demonstrate the complexity in designing advanced ceramic photocatalytic systems while highlighting their potential for environmental remediation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell 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.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 192462505
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Phase Transformations, Microstructural Effects, and Photocatalytic Activity of Tungsten Trioxide‐Geopolymer Composites.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Wilson%2C+Jamie%22">Wilson, Jamie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jtw57@bath.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Ke%2C+Xinyuan%22">Ke, Xinyuan</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maskell%2C+Daniel%22">Maskell, Daniel</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ball%2C+Richard+J%2E%22">Ball, Richard J.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Ceramic+Society%22">Journal of the American Ceramic Society</searchLink>. Mar2026, Vol. 109 Issue 3, p1-18. 18p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Photocatalysts%22">Photocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+trioxide%22">Tungsten trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Air+pollution%22">Air pollution</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Water+pollution%22">Water pollution</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Water and air pollution are pervasive issues, impacting the majority of global citizens. In response, geopolymers functionalized with photocatalytic metal oxides have emerged as sustainable materials for environmental remediation. This study examines how the Si/Al molar ratio (1 and 2) and photocatalytic WO3 loading (WO3/Al molar ratios of 0.10, 0.15, and 0.20) impact the microstructural, optical, and photocatalytic properties of WO3‐geopolymer composites. XRD analysis showed the complete conversion of WO3 into Na2WO4, impairing the intended photocatalytic function under visible light. Solid‐state 27Al NMR showed incomplete geopolymerization, owing to NaOH consumption due to the Na2WO4 conversion. With WO3 loading, the BET surface for the Si/Al = 1 series stabilized at ∼ 11.7 m2/g after a significant initial decline; whereas the Si/Al = 2 series showed a substantial initial reduction and further reductions from 14.5 to 2.5 m2/g. The photocatalytic activity was evaluated by the decolorization of aqueous methylene blue (160 mg/L) and degradation of gaseous α‐pinene (1 ppm) under UV irradiation. The Si/Al = 1 series showed increased decolorization with WO3 loading, whereas the Si/Al = 2 series showed a decrease. Surprisingly, the pristine samples with no WO3 addition outperformed the WO3‐geopolymers in both series, as assessed by the decolorization of methylene blue, attributed to naturally occurring photocatalysts within the metakaolin feedstock and a larger surface area. This shows that the photocatalytic performance of geopolymers is not solely dependent on external photocatalytic WO3 loading but governed by the underlying geopolymer chemistry and network connectivity. These findings demonstrate the complexity in designing advanced ceramic photocatalytic systems while highlighting their potential for environmental remediation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192462505
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1111/jace.70659
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 1
    Subjects:
      – SubjectFull: Photocatalysts
        Type: general
      – SubjectFull: Tungsten trioxide
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Phase transitions
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Air pollution
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Water pollution
        Type: general
    Titles:
      – TitleFull: Phase Transformations, Microstructural Effects, and Photocatalytic Activity of Tungsten Trioxide‐Geopolymer Composites.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Wilson, Jamie
      – PersonEntity:
          Name:
            NameFull: Ke, Xinyuan
      – PersonEntity:
          Name:
            NameFull: Maskell, Daniel
      – PersonEntity:
          Name:
            NameFull: Ball, Richard J.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00027820
          Numbering:
            – Type: volume
              Value: 109
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Journal of the American Ceramic Society
              Type: main
ResultId 1