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From superconductor to photocatalyst: Bi₂Sr₂CaCu₂O₈₊x as an efficient visible-light photocatalyst for organic dye degradation.

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Title: From superconductor to photocatalyst: Bi₂Sr₂CaCu₂O₈₊x as an efficient visible-light photocatalyst for organic dye degradation.
Authors: Wang, Nan1 (AUTHOR), Wang, Haiyang1 (AUTHOR), Feng, Ruobing1 (AUTHOR), Li, Xiyu1 (AUTHOR), Liu, Wenbin2 (AUTHOR), Zhang, Weiwei1,3 (AUTHOR) zwwno_1@163.com, Xu, Jiayao1,3 (AUTHOR) xu880315@163.com, Zhang, Bowen1,4 (AUTHOR) zhangbwz@163.com
Source: Journal of Alloys & Compounds. Feb2026, Vol. 1056, pN.PAG-N.PAG. 1p.
Subjects: High temperature superconductors, Photocatalysis, Photodegradation, Environmental remediation, Photocatalysts, Superconductors, Nanostructured materials
Abstract: The high-temperature superconductor Bi 2 Sr 2 CaCu 2 O 8+ x (Bi2212) has attracted considerable attention in the field of superconductivity due to its unique copper-oxygen layered structure and strong electron correlation effects. In this study, we innovatively extend the application of Bi2212 to the field of photocatalysis. Using a glycine-nitrate combustion method followed by high-temperature calcination at 830–880℃, Bi2212 nanosheets were successfully synthesized. We systematically investigated their dual functionality in both superconductivity and photocatalytic degradation of organic pollutants for the first time. The sample calcined at 850℃ (Bi2212–850) exhibits excellent photocatalytic activity under visible-light irradiation. It demonstrates a photodegradation rate for Rhodamine B (RhB) reaching 0.0956 min−1, achieving 100 % degradation efficiency along with good cycling stability. This remarkable performance originates from the synergistic effect of lattice oxygen and oxygen vacancies. We propose a possible photocatalytic degradation mechanism, realizing for the first time the transformation of the superconducting material Bi2212 into a highly efficient photocatalyst. This work not only reveals the potential of Bi2212 in photocatalysis but also provides a new perspective for designing multifunctional oxide materials. • High-crystallinity Bi2212 nanosheets were successfully synthesized via a glycine-nitrate combustion method. • Optimal sintering at 850°C, Bi2212–850 nanosheets have superior crystallinity and the highest photocatalytic activity. • Radical trapping experiments identified superoxide radicals (·O₂⁻) and holes (h⁺) as the primary active species responsible for the efficient photodegradation of RhB. • Bi2212 is confirmed as a p-type semiconductor with a narrow band gap (∼0.88 eV) and broad visible-light absorption, underpinning its high photocatalytic performance and potential for environmental remediation. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 191524854
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: From superconductor to photocatalyst: Bi₂Sr₂CaCu₂O₈₊x as an efficient visible-light photocatalyst for organic dye degradation.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Nan%22">Wang, Nan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Haiyang%22">Wang, Haiyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feng%2C+Ruobing%22">Feng, Ruobing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xiyu%22">Li, Xiyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Wenbin%22">Liu, Wenbin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Weiwei%22">Zhang, Weiwei</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> zwwno_1@163.com</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Jiayao%22">Xu, Jiayao</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> xu880315@163.com</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Bowen%22">Zhang, Bowen</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> zhangbwz@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Alloys+%26+Compounds%22">Journal of Alloys & Compounds</searchLink>. Feb2026, Vol. 1056, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22High+temperature+superconductors%22">High temperature superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysts%22">Photocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructured+materials%22">Nanostructured materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The high-temperature superconductor Bi 2 Sr 2 CaCu 2 O 8+ x (Bi2212) has attracted considerable attention in the field of superconductivity due to its unique copper-oxygen layered structure and strong electron correlation effects. In this study, we innovatively extend the application of Bi2212 to the field of photocatalysis. Using a glycine-nitrate combustion method followed by high-temperature calcination at 830–880℃, Bi2212 nanosheets were successfully synthesized. We systematically investigated their dual functionality in both superconductivity and photocatalytic degradation of organic pollutants for the first time. The sample calcined at 850℃ (Bi2212–850) exhibits excellent photocatalytic activity under visible-light irradiation. It demonstrates a photodegradation rate for Rhodamine B (RhB) reaching 0.0956 min−1, achieving 100 % degradation efficiency along with good cycling stability. This remarkable performance originates from the synergistic effect of lattice oxygen and oxygen vacancies. We propose a possible photocatalytic degradation mechanism, realizing for the first time the transformation of the superconducting material Bi2212 into a highly efficient photocatalyst. This work not only reveals the potential of Bi2212 in photocatalysis but also provides a new perspective for designing multifunctional oxide materials. • High-crystallinity Bi2212 nanosheets were successfully synthesized via a glycine-nitrate combustion method. • Optimal sintering at 850°C, Bi2212–850 nanosheets have superior crystallinity and the highest photocatalytic activity. • Radical trapping experiments identified superoxide radicals (·O₂⁻) and holes (h⁺) as the primary active species responsible for the efficient photodegradation of RhB. • Bi2212 is confirmed as a p-type semiconductor with a narrow band gap (∼0.88 eV) and broad visible-light absorption, underpinning its high photocatalytic performance and potential for environmental remediation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds 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:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.jallcom.2026.186564
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: High temperature superconductors
        Type: general
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Photodegradation
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Photocatalysts
        Type: general
      – SubjectFull: Superconductors
        Type: general
      – SubjectFull: Nanostructured materials
        Type: general
    Titles:
      – TitleFull: From superconductor to photocatalyst: Bi₂Sr₂CaCu₂O₈₊x as an efficient visible-light photocatalyst for organic dye degradation.
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            NameFull: Wang, Nan
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            NameFull: Wang, Haiyang
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            NameFull: Feng, Ruobing
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            NameFull: Li, Xiyu
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            NameFull: Liu, Wenbin
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            NameFull: Zhang, Weiwei
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            NameFull: Xu, Jiayao
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            NameFull: Zhang, Bowen
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            – D: 25
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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              Value: 1056
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            – TitleFull: Journal of Alloys & Compounds
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