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2D BiOBrxCl1-x nanosheets for photocatalytic degradation of tetracycline
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DOI：10.1016/j.cattod.2026.115894.png)
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Abstract
En 中文
A series of sheet-structured BiOBrxCl1-x solid solutions was prepared using a simple precipitation method, and the effect of halogen composition on their morphology and photocatalytic properties was investigated. The photocatalytic performance of BiOBrxCl1-x was evaluated in degradation of tetracycline (TC) under simulated solar irradiation. Among all samples studied, BiOBr0.9Cl0.1 exhibited the highest TC degradation efficiency (79.5%) within 30 min, much higher than that of pure BiOBr (65.0%) and BiOCl (38.8%). Combined with microstructural characterization, optical tests and photoelectrochemical measurements, the superior photocatalytic activity of BiOBr0.9Cl0.1 was attributed to the enriched exposure of high-activity (102) facets, together with an extended spectral response and optimized band edge positions. Meanwhile, accelerated charge separation behavior was further verified by photoelectrochemical and photoluminescence analyses. Free radical trapping experiments and electron spin resonance (ESR) measurements suggest that •O2- is the dominant reactive species in the photocatalytic degradation process.
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