Water Science and Technology (Oct 2023)

Bamboo charcoal fiber bundles loaded MOF-derived magnetic Co/CoO porous polyhedron for efficiently catalytic degradation of tetracyclines hydrochloride

  • Lanling Dai,
  • Ce Cui,
  • Mengyuan Yang,
  • Shan Jiang,
  • Jianwu Lan,
  • Ronghui Guo

DOI
https://doi.org/10.2166/wst.2023.323
Journal volume & issue
Vol. 88, no. 8
pp. 2033 – 2053

Abstract

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The health of living things and the ecosystem of the planet have both been negatively impacted by antibiotic residue in the water environment. There has been a lot of interest in the catalyst made of metal-carbon compounds from MOFs as a potential solution for activating peroxymonosulfate (PMS) to produce reactive oxygen species to catalyze the degradation of residual antibiotics. In this study, zeolitic imidazolate frameworks (ZIF-67) on bamboo fiber bundles (BFB) were pyrolyzed to produce magnetic Co/CoO nanoparticles with porous polyhedrons mounted on bamboo charcoal fiber bundles (BCFB)(BCFB@PCo/CoO). Specific surface area of obtained BCFB@PCo/CoO with abundant active sites arrives at 302.41 m2/g. The catalytic degradation efficiency of Tetracycline hydrochloride (TCH), a target contaminant, could reach up to 99.94% within 15 minutes (PMS = 0.4g/L, Cat. = 0.2g/L). The effects of potential factors, including PMS dosage, interference ions, and temperature, on catalytic degradation efficiencies were investigated. Magnetic recovery and antimicrobial properties of the BCFB@PCo/CoO were also evaluated and the possible degradation pathways were explored. Catalytic mechanism explorations of BCFB@PCo/CoO/PMS system reveal MOF-derived magnetic Co/CoO nanoparticles embedded in BCFB promote the synergistic interaction of both radicals and non-radical pathways for catalytic degradation of TCH. The novel BCFB@PCo/CoO provides an alternative to deal with wastewater containing antibiotics. HIGHLIGHTS A novel BCFB@PCo/CoO catalyst was prepared via in-situ growth and pyrolysis of ZIF-67-coated bamboo fiber bundles.; The BCFB@PCo/CoO composite exhibits a high catalytic activity (99.94% for 30mg/L TCH within 15 min) and stability.; The synergistic interaction of both radicals and nonradical pathways for the catalytic degradation of TCH.;

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