Wu Jiabao, Xu Meiyu, Li Zhenzi, Li Mingxia, Zhou Wei
School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Nanomaterials (Basel). 2025 Feb 28;15(5):373. doi: 10.3390/nano15050373.
Defects and heteroatom doping are two refined microstructural factors that significantly affect the performance of photocatalytic materials. Coupling defect and doping engineering is a powerful approach for designing efficient photocatalysts. In this research, we successfully construct dual defect-engineered BiVO nanosheets (BVO-N-OV) by introducing N doping and oxygen vacancies through ammonium oxalate-assisted thermal treatment of BiVO nanosheets. Due to the combined enhancement of band structure and surface properties from N doping and oxygen vacancies, the obtained BVO-N-OV nanosheets demonstrate improved visible light absorption, effective charge transfer efficiency, and increased active sites. As a result, the constructed BVO-N-OV/PMS system demonstrates significantly enhanced ciprofloxacin (CIP) removal performance under visible light illumination. The highest rate constant for CIP degradation over BVO-N-OV/PMS system is 7.9, 1.9, and 6.6 times greater than pristine BiVO (BVO), oxygen vacancy-enriched BiVO (BVO-OV), and N-doped BiVO (BVO-N), respectively. Even in a broad pH range (3.0-11.0) with various anions, the BVO-N-OV/PMS/Vis system still demonstrates stable and excellent CIP removal performance. This study seeks to provide valuable insights into the interaction between defect and doping engineering in photocatalytic activation of PMS, thereby proposing new strategies for designing effective photocatalyst/PMS systems for wastewater treatment.
缺陷和杂原子掺杂是两个显著影响光催化材料性能的精细微观结构因素。耦合缺陷与掺杂工程是设计高效光催化剂的有力方法。在本研究中，我们通过对BiVO纳米片进行草酸铵辅助热处理引入N掺杂和氧空位，成功构建了双缺陷工程化的BiVO纳米片（BVO-N-OV）。由于N掺杂和氧空位对能带结构和表面性质的综合增强作用，所制备的BVO-N-OV纳米片表现出改善的可见光吸收、有效的电荷转移效率以及增加的活性位点。结果，构建的BVO-N-OV/PMS体系在可见光照射下展现出显著增强的环丙沙星（CIP）去除性能。BVO-N-OV/PMS体系对CIP降解的最高速率常数分别比原始BiVO（BVO）、富氧空位的BiVO（BVO-OV）和N掺杂的BiVO（BVO-N）高7.9倍、1.9倍和6.6倍。即使在具有各种阴离子的宽pH范围（3.0 - 11.0）中，BVO-N-OV/PMS/Vis体系仍表现出稳定且优异的CIP去除性能。本研究旨在为光催化活化PMS过程中缺陷与掺杂工程之间的相互作用提供有价值的见解，从而为设计用于废水处理的有效光催化剂/PMS体系提出新策略。
