Citation: Yaping ZHANG, Tongchen WU, Yun ZHENG, Bizhou LIN. Z-scheme heterojunction β-Bi₂O₃ pillared CoAl layered double hydroxide nanohybrid: Fabrication and photocatalytic degradation property[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(3): 531-539. doi: 10.11862/CJIC.20240256 shu

Z-scheme heterojunction β-Bi₂O₃ pillared CoAl layered double hydroxide nanohybrid: Fabrication and photocatalytic degradation property

1.
College of Harbour and Coastal Engineering, Jimei University, Xiamen, Fujian 361021, China
2.
College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China

Corresponding author: Yaping ZHANG, ypzhang@jmu.edu.cn
Received Date: 5 July 2024
Revised Date: 4 January 2025

Figures(6)

Employing an exfoliation-reassembly route, β-Bi₂O₃ pillared CoAl layered double hydroxide (CoAl-LDH) nanohybrid (β-Bi₂O₃/CoAl-LDH) was successfully fabricated using the delaminated CoAl-LDH nanosheets as the host and the β-Bi₂O₃ nanosol as the guest. The as-prepared catalyst morphology, structure, and photoelectrochemical behaviors were characterized by X-ray diffraction, transmission electron microscopy, UV-Vis absorption spectroscopy, X-ray photoelectron spectroscopy, etc. The pillared nanohybrid β-Bi₂O₃/CoAl-LDH shows a pillared interlayer region with a spacing of 2.1 nm, an expanded specific surface area of 62 m²·g^-1, and superior visible-light response-ability. Under visible light radiation, the photocatalytic properties were investigated by tetracycline (TC) degradation. β-Bi₂O₃/CoAl-LDH exhibits a high degradation efficiency and 91.3% of TC was degraded within 90 min, much higher than its parents β-Bi₂O₃ and CoAl-LDH. The radial capture and electron paramagnetic resonance experiments reveal that oxygen radical ·O₂^- and hydroxyl radical ·OH were the predominant radicals in the photocatalytic system, which is attributed to the synergistic effect between β-Bi₂O₃ and CoAl-LDH. Their electronic coupling interactions lead to the formation of Z-scheme heterojunction in the pillared nanohybrid. The separation efficiency of the photogenerated electron-hole pairs is improved and the photocatalytic activity is enhanced significantly.
- photocatalyst,
- bismuth oxide,
- layered double hydroxide,
- pillared composite,
- Z-scheme heterojunction,
- tetracycline
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沈阳化工大学材料科学与工程学院沈阳 110142

Z-scheme heterojunction β-Bi2O3 pillared CoAl layered double hydroxide nanohybrid: Fabrication and photocatalytic degradation property

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通讯作者: 陈斌, bchen63@163.com

Z-scheme heterojunction β-Bi₂O₃ pillared CoAl layered double hydroxide nanohybrid: Fabrication and photocatalytic degradation property