期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 323, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2023.124425
关键词
High-energy ball-milling; Fe-doped bismuth oxysulfide; Peroxymonosulfate; Tetracycline; Environmental photocatalysis
A feasible high-energy ball-milling strategy was used to prepare Fe-doped bismuth oxysulfide (Bi2O2S) that showed durable activation of peroxymonosulfate (PMS) to degrade tetracycline (TC) under light irradiation at a wide range of pH. The synergy between Fe doping and Fe-O bond increased active sites for charge separation and PMS activation, facilitating the redox regeneration of Fe3+ to Fe2+. The optimized Fe-doped BiOS catalyst with 3.3%Fe/BiOS achieved efficient removal of tetracycline within 30 minutes. Nonradical (1O2) and accessible radical (O2.-, SO4.�, .OH) pathways were proposed as responsible for PMS-activated TC degradation under light irradiation. This work provides a reproducible method for scalable production of high-efficiency photocatalysts through high-energy ball-milling, and extends the application of the PMS activation system in practical environmental remediation.
Here we report a feasible high-energy ball-milling strategy to prepare Fe-doped bismuth oxysulfide (Bi2O2S) that exhibits durable activation of peroxymonosulfate (PMS) in a wide range of pH to degrade tetracycline (TC) under light irradiation. Its successful performance was achieved by the synergistic effect of Fe doping and Fe-O bond, resulting in increased active sites for accelerating the charge separation and PMS activation and promoting the redox regeneration of Fe3+ to Fe2+. The activity of Fe-doped BiOS was systematically optimized, and tetracycline as a model pollutant can be removed within 30 min using 3.3%Fe/BiOS. The nonradical (1O2) and accessible radical (O2.-, SO4.�, .OH) pathways were proposed to be responsible for PMS-activated TC degradation under light irradiation. This present work paves a replicable avenue to scalable production of high-efficiency photocatalysts using a high-energy ball-milling procedure and extends the promising application of the PMS activation system in practical environmental remediation.
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