Abstract：
Oxygen vacancy-rich β-Bi2O3/Bi2O2SiO3 (BO/BOS) Z-Scheme heterojunction was prepared by hydrothermal method-assisted calcination. Under visible light, β-Bi2O3/Bi2O2SiO3 photocatalyst demonstrated superior photocatalytic efficacy in degrading antibiotics and antibiotic-resistant Escherichia coli (AR E. coli) compared to individual β-Bi2O3 and Bi2O2SiO3. The experimental results showed that BO/BOS-450 sample possessed the best photocatalytic activity against tetracycline (2 h, 80.8%), amoxicillin (4 h, 57.9%) and AR E. coli (3 h, 107.43 CFU·mL-1). BO/BOS-450 sample showed 91.8% electrostatic capture of AR E. coli in the bacterial capture experiment. In the antibiotic-resistant genes (ARGs) degradation experiment, BO/BOS-450 sample was able to bring the log10 (Ct/C0) value of tetA to -3.49 after 2 h. Oxygen vacancies (OVs) were verified through HR-TEM, XPS and EPR analyses. ESR experiments aligned with the quenching experiment results, confirming that the crucial active species were ‧O2- and h+ during photocatalytic sterilization. A small-scale sewage treatment equipment was designed for the effective removal of ARB from real water samples.
摘要：
通过水热法辅助煅烧制备了富氧空位β-Bi2O3/Bi2O2SiO3（BO/BOS）Z-Scheme异质结。在可见光下,与单独的β-Bi2O3和Bi2O2SiO3相比，β-Bi2O3/Bi2O2SiO3光催化剂在降解抗生素和耐抗生素大肠杆菌（ARE.coli）方面表现出优异的光催化效果。实验结果表明,BO/BOS-450样品对四环素具有最佳的光催化活性(2h,80.8%），阿莫西林（4小时，57.9%)和AR大肠杆菌(3小时，107.43CFU·mL-1)。BO/BOS-450样品在细菌捕获实验中显示出91.8%的AR大肠杆菌静电捕获。在抗生素抗性基因(ARGs)转化实验中，四环素耐药，4小时后，阿莫西林耐药和头孢曲松耐药基因被完全去除。通过HR-TEM验证氧空位（OVs），XPS和EPR分析。ESR实验与淬火实验结果一致，确认在光催化灭菌过程中关键的活性物质是·O-2和h+。设计了一种小型污水处理设备，用于从实际水样中有效去除ARB。
