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Self-Assembly of Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-Scheme Heterostructures for Efficient Visible-Light-Driven Photocatalytic Degradation of Tetracycline.

Baikang ZhuQinbin DongJianghua HuangMengmeng YangXianlei ChenChunyang ZhaiQingguo ChenBohong WangHengcong TaoLi Chen
Published in: ACS omega (2023)
Fabrication of S-scheme heterojunctions with enhanced redox capability offers an effective approach to address environmental remediation. In this study, high-performance Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-scheme heterojunction photocatalysts were fabricated via the in situ growth of Bi 2 Sn 2 O 7 on β-Bi 2 O 3 microspheres. The optimized Bi 2 Sn 2 O 7 /β-Bi 2 O 3 (BSO/BO-0.4) degradation efficiency for tetracycline hydrochloride was 95.5%, which was 2.68-fold higher than that of β-Bi 2 O 3 . This improvement originated from higher photoelectron-hole pair separation efficiency, more exposed active sites, excellent redox capacity, and efficient generation of · O 2 - and · OH. Additionally, Bi 2 Sn 2 O 7 /β-Bi 2 O 3 exhibited good stability against photocatalytic degradation, and the degradation efficiency remained >89.7% after five cycles. The photocatalytic mechanism of Bi 2 Sn 2 O 7 /β-Bi 2 O 3 S-scheme heterojunctions was elucidated. In this study, we design and fabricate high-performance heterojunction photocatalysts for environmental remediation using S-scheme photocatalysts.
Keyphrases
  • visible light
  • gold nanoparticles
  • high resolution
  • mass spectrometry
  • human health
  • simultaneous determination