光降解
电子顺磁共振
光催化
材料科学
密度泛函理论
可见光谱
化学
化学工程
光化学
光电子学
计算化学
催化作用
核磁共振
物理
有机化学
工程类
作者
Abhinandan Kumar,Pardeep Singh,Van‐Huy Nguyen,Quyet Van Le,Tansir Ahamad,Sourbh Thakur,Babasaheb M. Matsagar,Savaş Kaya,Mikhail M. Maslov,Kevin Chien-Chang Wu,Lan Huong Nguyen,Pankaj Raizada
标识
DOI:10.1016/j.envres.2024.118519
摘要
The present study explores visible light-assisted photodegradation of ciprofloxacin hydrochloride (CIP) antibiotic as a promising solution to water pollution. The focus is on transforming the optical and electronic properties of BiOCl through the generation of oxygen vacancies (OVs) and the exposure of (110) facets, forming a robust S-scheme heterojunction with WS2. The resultant OVs mediated composite with an optimal ratio of WS2 and BiOCl-OV (4-WS2/BiOCl-OV) demonstrated remarkable efficiency (94.3%) in the visible light-assisted photodegradation of CIP antibiotic within 1.5 h. The CIP degradation using 4-WS2/BiOCl-OV followed pseudo-first-order kinetics with the rate constant of 0.023 min-1, outperforming bare WS2, BiOCl, and BiOCl-OV by 8, 6, and 4 times, respectively. Density functional theory (DFT) analysis aligned well with experimental results, providing insights into the structural arrangement and bandgap analysis of the photocatalysts. Liquid chromatography-mass spectrometry (LC-MS) analysis utilized for identifying potentially degraded products while scavenging experiments and electron paramagnetic resonance (EPR) spin trapping analysis elucidated the S-scheme charge transfer mechanism. This research contributes to advancing the design of oxygen vacancy-mediated S-scheme systems in the realm of photocatalysis, with potential implications for addressing water pollution concerns.
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