2D Z-scheme heterojunction and oxygen deficiency synergistically boosting the photocatalytic activity of a layered BaTiO3/BiOIO3 composite

Panpan Jing*, Chenpu He, Shengchi Huang, Haohui Li, Jiale Liu, Yongfei Cui, Yongping Pu, Jenghan Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Simultaneously enhancing the quantity, separation efficiency and redox capability of photo-excited carriers to boost the catalytic activity has always been the toughest challenge for a photocatalyst. Herein, we presented a novel BaTiO3/BiOIO3 layered composite by proposing a synergistic strategy of 2D Z-scheme heterojunction and rich oxygen deficiency. Due to the high-quality interfaces with strong coupling interaction and stable IO3/I redox pairs between BaTiO3 and BiOIO3 layers, the composite was endowed concurrently with the strengthened photo response, separation efficiency and high redox capability of photo-excited carriers through a Z-scheme migration pathway. DFT computation emphasized that the formation of IO3/I redox pair and band gap of the composite were highly related to oxygen deficiency. Moreover, the ·O2 radicals can be expansively stimulated by the well-known local surface plasmon resonance effect of oxygen deficiency via inducing extra hot electrons. As a result, the composite performed a 4.4-fold enhanced photocatalytic activity than pure BaTiO3 toward the photo-degradation of tetracycline, which can be completed in just a few minutes. Therefore, we hope that the proposed heterojunction and oxygen deficiency synergistic boosting the photocatalytic activity of BaTiO3 could open a lot of insights for developing more efficient composite photocatalysts to solve the water pollutions.

Original languageEnglish
Article number101574
JournalApplied Materials Today
Volume29
DOIs
Publication statusPublished - 2022 Dec

Keywords

  • BaTiO/BiOIO
  • IO/I redox pair
  • Oxygen deficiency
  • Photo-degradation
  • Z-scheme heterojunction

ASJC Scopus subject areas

  • General Materials Science

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