Tai Ran, Gao Shuai, Tang Yao, Ma Xinbo, Ding Peiren, Wu Runjie, Li Peishen, Song Xingjian, Chen Shaowei, Wang Qiang
Laboratory for Micro-sized Functional Materials & College of Elementary Education and Department of Chemistry, Capital Normal University, Beijing, 100048, China.
College of Environmental Sciences and Engineering, The Key Laboratory of Water and Sediment Sciences (MOE), Peking University, Beijing, 100871, China.
Small. 2024 Jul;20(29):e2310785. doi: 10.1002/smll.202310785. Epub 2024 Feb 9.
Infiltration of excessive antibiotics into aquatic ecosystems plays a significant role in antibiotic resistance, a major global health challenge. It is therefore critical to develop effective technologies for their removal. Herein, defect-rich BiWO nanoparticles are solvothermally prepared via epitaxial growth on pristine BiWO seed nanocrystals, and the efficiency of the photocatalytic degradation of ciprofloxacin, a common antibiotic, is found to increase markedly from 62.51% to 98.27% under visible photoirradiation for 60 min. This is due to the formation of a large number of structural defects, where the synergistic interactions between grain boundaries and adjacent dislocations and oxygen vacancies lead to an improved separation and migration efficiency of photogenerated carriers and facilitate the adsorption and degradation of ciprofloxacin, as confirmed in experimental and theoretical studies. Results from this work demonstrate the unique potential of defect engineering for enhanced photocatalytic performance, a critical step in removing antibiotic contaminants in aquatic ecosystems.
过量抗生素渗入水生生态系统在抗生素耐药性方面起着重要作用，这是一项重大的全球健康挑战。因此，开发有效的去除技术至关重要。在此，通过在原始BiWO籽晶纳米晶体上外延生长，溶剂热法制备了富含缺陷的BiWO纳米颗粒，发现在可见光照射60分钟的情况下，常见抗生素环丙沙星的光催化降解效率从62.51%显著提高到98.27%。这是由于形成了大量结构缺陷，晶界与相邻位错和氧空位之间的协同相互作用导致光生载流子的分离和迁移效率提高，并促进了环丙沙星的吸附和降解，实验和理论研究均证实了这一点。这项工作的结果证明了缺陷工程在增强光催化性能方面的独特潜力，这是去除水生生态系统中抗生素污染物的关键一步。
