Citation: Zhou Zhiruo, Li Yanan, Li Mingmei, Li Yi, Zhan Sihui. Efficient removal for multiple pollutants via Ag₂O/BiOBr heterojunction: A promoted photocatalytic process by valid electron transfer pathway[J]. Chinese Chemical Letters, ;2020, 31(10): 2698-2704. doi: 10.1016/j.cclet.2020.07.003 shu

Efficient removal for multiple pollutants via Ag₂O/BiOBr heterojunction: A promoted photocatalytic process by valid electron transfer pathway

Zhou Zhiruo ^a ,
Li Yanan ^b ,
Li Mingmei ^a ,
Li Yi ^b ,
Zhan Sihui ^a,c,*,

a.
College of Environmental Science and Engineering, Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
b.
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China
c.
Tianjin Key Lab for Rare Earth Materials and Applications, Tianjin 300072, China

sihuizhan@nankai.edu.cn

Received Date: 2 April 2020
Revised Date: 6 June 2020
Accepted Date: 1 July 2020
Available Online: 1 July 2020

Figures(7)

Multiple pollutants including pathogenic microorganism contaminations and emerging organic contaminations (EOCs) have shown a growing threat to the environment, especially the natural waters. However, the control and removal of pathogenic microorganism contaminations and EOCs have been greatly limited since limited knowledge of their environmental behaviors. Thus, a novel and efficient photocatalyst Ag₂O/BiOBr heterojunction was synthesized and used for removal of multiple pollutants including Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), tetracycline and acetaminophen under visible light. The results showed that there were valid electron transfer pathways between BiOBr and Ag₂O, the main electron transfer direction was the BiOBr to Ag₂O. Photo-generated electrons were stored in Ag₂O and thus separation efficiency between holes and photo-generated electrons was obviously enhanced. Active oxygen species were highly produced and eventually end up with the high efficiency of removal of multiple pollutants. For Ag₂O/BiOBr with Ag₂O content at 3% (the best performance) under visible light, log decrease of E. coli was 7.16 (removal efficiency was 100%) in 120 min, log decrease of S. aureus was 7.23 (removal efficiency was 100%) in 160 min, C/C₀ of tetracycline was 0.06 in 180 min, C/C₀ of acetaminophen was 0.17 in 180 min. This work could provide a promising candidate in the actual contaminated natural waters for cleaning multiple pollutants.
- Water pollution,
- Photocatalysis,
- Multiple pollutants,
- Electrons transfer channels
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Efficient removal for multiple pollutants via Ag2O/BiOBr heterojunction: A promoted photocatalytic process by valid electron transfer pathway

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通讯作者: 陈斌, bchen63@163.com

Efficient removal for multiple pollutants via Ag₂O/BiOBr heterojunction: A promoted photocatalytic process by valid electron transfer pathway