Scholarlink

<p>Herein, a BiOBr/TiO<sub>2</sub> heterojunction photocatalyst engineered <i>via</i> controlled solvothermal synthesis demonstrates exceptional oxytetracycline (OTC) degradation efficiency. Comprehensive characterization [scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS)] confirmed the successful formation of a BiOBr/TiO<sub>2</sub> heterostructure. Subsequent analyses [transient photocurrent (TPR), electrochemical impedance spectroscopy (EIS), electron paramagnetic resonance (EPR)] verified optimized band alignment, achieving 87.8% OTC removal within 90 min (a 3.39-fold enhancement over pristine BiOBr). Mechanistic studies revealed dual degradation pathways involving radicals (·O<sub>2</sub><sup>−</sup>/·OH) and direct hole oxidation. The heterojunction significantly extended carrier lifetime (EIS arc radius reduced by 68%) while maintaining sufficient redox potentials. Furthermore, the catalyst exhibited robust stability (&gt;75% efficiency after 8 cycles) and practical applicability in a simulated wastewater system. This work provides new insights and data for efficient antibiotic removal and establishes fundamental principles for heterojunction engineering in antibiotic remediation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhanced Photocatalytic Antibiotic Degradation Through BiOBr/TiO2 Heterojunction Engineering: Synergistic Charge Separation and Band Alignment Effects

  • 期刊论文

  • 发表日期：

    2025年9月3日

查看全文
  • Yingqi Luo,
  • Xiaoxiao Yang,
  • Hejia Sun,
  • Ning Wang,
  • Yonghong Liu,
  • Yunfeng Li

摘要

Herein, a BiOBr/TiO2 heterojunction photocatalyst engineered via controlled solvothermal synthesis demonstrates exceptional oxytetracycline (OTC) degradation efficiency. Comprehensive characterization [scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS)] confirmed the successful formation of a BiOBr/TiO2 heterostructure. Subsequent analyses [transient photocurrent (TPR), electrochemical impedance spectroscopy (EIS), electron paramagnetic resonance (EPR)] verified optimized band alignment, achieving 87.8% OTC removal within 90 min (a 3.39-fold enhancement over pristine BiOBr). Mechanistic studies revealed dual degradation pathways involving radicals (·O2−/·OH) and direct hole oxidation. The heterojunction significantly extended carrier lifetime (EIS arc radius reduced by 68%) while maintaining sufficient redox potentials. Furthermore, the catalyst exhibited robust stability (>75% efficiency after 8 cycles) and practical applicability in a simulated wastewater system. This work provides new insights and data for efficient antibiotic removal and establishes fundamental principles for heterojunction engineering in antibiotic remediation.