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A ferroelectric photocatalyst Ag10Si4O13 with visible-light photooxidation properties

Journal Article


Abstract


  • Ferroelectric p-block semiconductors are regarded as a new family of visible-light photocatalysts because of their dispersive and anisotropic band structures, as well as their intrinsic internal electric field. Silver silicates belong to this family and have band structures and an internal electric field that can be engineered by modulating the stoichiometry of Ag and SiO4. Here, we have developed a new ferroelectric p-block photocatalyst, Ag10Si4O13, by materials design and band engineering, which exhibits excellent photocatalytic activity towards the degradation of organic compounds, which is driven by visible light. Owing to the unique d10 and sp/p configurations in its electronic structure, Ag10Si4O13 possesses an indirect band gap of 1.72 eV with a highly dispersive conductive band and a flat valence band. This electronic structure promotes the generation, separation, and mobility of photo-induced charge carriers under visible-light illumination, which has been verified experimentally and theoretically. The compatible energy level of the conduction band determines its strong photo-oxidative capability. Moreover, the charge transfer process takes advantage of the existence of an internal electric field in Ag10Si4O13, which is attributed to the distorted SiO4 chain structure.

Authors


  •   Al-Keisy, Amar (external author)
  •   Ren, Long
  •   Cui, Dandan (external author)
  •   Xu, Zhongfei (external author)
  •   Xu, Xun
  •   Su, Xiangdong (external author)
  •   Hao, Weichang (external author)
  •   Dou, Shi Xue
  •   Du, Yi

Publication Date


  • 2016

Citation


  • Al-Keisy, A., Ren, L., Cui, D., Xu, Z., Xu, X., Su, X., Hao, W., Dou, S. X. & Du, Y. (2016). A ferroelectric photocatalyst Ag10Si4O13 with visible-light photooxidation properties. Journal of Materials Chemistry A, 4 (28), 10992-10999.

Scopus Eid


  • 2-s2.0-84978374785

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2127

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 10992

End Page


  • 10999

Volume


  • 4

Issue


  • 28

Place Of Publication


  • United Kingdom

Abstract


  • Ferroelectric p-block semiconductors are regarded as a new family of visible-light photocatalysts because of their dispersive and anisotropic band structures, as well as their intrinsic internal electric field. Silver silicates belong to this family and have band structures and an internal electric field that can be engineered by modulating the stoichiometry of Ag and SiO4. Here, we have developed a new ferroelectric p-block photocatalyst, Ag10Si4O13, by materials design and band engineering, which exhibits excellent photocatalytic activity towards the degradation of organic compounds, which is driven by visible light. Owing to the unique d10 and sp/p configurations in its electronic structure, Ag10Si4O13 possesses an indirect band gap of 1.72 eV with a highly dispersive conductive band and a flat valence band. This electronic structure promotes the generation, separation, and mobility of photo-induced charge carriers under visible-light illumination, which has been verified experimentally and theoretically. The compatible energy level of the conduction band determines its strong photo-oxidative capability. Moreover, the charge transfer process takes advantage of the existence of an internal electric field in Ag10Si4O13, which is attributed to the distorted SiO4 chain structure.

Authors


  •   Al-Keisy, Amar (external author)
  •   Ren, Long
  •   Cui, Dandan (external author)
  •   Xu, Zhongfei (external author)
  •   Xu, Xun
  •   Su, Xiangdong (external author)
  •   Hao, Weichang (external author)
  •   Dou, Shi Xue
  •   Du, Yi

Publication Date


  • 2016

Citation


  • Al-Keisy, A., Ren, L., Cui, D., Xu, Z., Xu, X., Su, X., Hao, W., Dou, S. X. & Du, Y. (2016). A ferroelectric photocatalyst Ag10Si4O13 with visible-light photooxidation properties. Journal of Materials Chemistry A, 4 (28), 10992-10999.

Scopus Eid


  • 2-s2.0-84978374785

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2127

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 10992

End Page


  • 10999

Volume


  • 4

Issue


  • 28

Place Of Publication


  • United Kingdom