Journal
SURFACES AND INTERFACES
Volume 29, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.surfin.2022.101787
Keywords
Bi2SiO5; Oxygen vacancies; Photocatalysis; Visible light; Tetracycline
Categories
Funding
- scheme of Stu-dents Innovation Project of Sichuan Province [B50104606]
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province [CSPC202105]
- Sichuan University of Science and Engineering [2021RC26]
- open project of Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Prov-ince [2021FTSZ06]
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Visible light responsive flower-like Bi2SiO5 photocatalysts with ample oxygen vacancies (OVs) were successfully synthesized via a template-free solvothermal treatment process. By adjusting the content of OVs, the photocatalytic efficiency was improved, and the degradation of tetracycline was enhanced.
Visible light responsive flower-like Bi2SiO5 photocatalysts with ample oxygen vacancies (OVs) were synthesized via a template-free solvothermal treatment process. Notably, the content of OVs on Bi2SiO5 sample prepared can be facilely adjusted by calcination Bi2SiO5 at the different temperature. Among all the samples, the content of OVs on the pristine Bi2SiO5 is the highest, confirmed by XPS and EPR characterization. The photocatalytic efficiency of OVs-Bi2SiO5 for detoxification of tetracycline (TC) is 2.6 times of that of Bi2SiO5-550 (the pristine Bi2SiO5 was calcined at 550 degrees C in air atmosphere). OVs can establish a new defective energy level in energy level of Bi2SiO5, inducing OVs-Bi2SiO5 absorbs visible light. Moreover, introduction of OVs facilitates the generation of superoxide radical (center dot O-2(-)) by activation of O-2 with the assistance of photoinduced electrons. Bi2SiO5 with rich OVs can effectively destruct tetracycline under visible light irradiation.
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