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<p>γ-AlOOH nanoflakes decorated nitrogen-doped reduced graphene oxide (γ-AlOOH/N-rGO) nanocomposite was synthesized through a one-step microwave-assisted hydrothermal method in this work. The engineered heterogeneous porous architecture and doped N atoms provided abundant adsorption sites and optimized mass transfer pathways, enabling exceptional ciprofloxacin (CIP) removal capability with a maximum adsorption capacity of 1565.67 mg/g at 318 K. Adsorption isotherm analysis revealed close adherence to the Langmuir model, while kinetic studies demonstrated pseudo-first-order behavior. The doped pyrrolic-N and pyridinic-N served as vital active sites for CIP adsorption. Synergistic mechanisms, including hydrogen bonding, π-π electron-donor-acceptor interactions, surface complexation, and pore-filling, were identified as key contributors to the enhanced adsorption performance. γ-AlOOH/N-rGO maintained 88.29% removal efficiency after five regeneration cycles, demonstrating significant potential for antibiotic remediation in aqueous systems.</p> Graphical Abstract <p></p>

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Super removal of ciprofloxacin by microwave-assisted prepared γ-AlOOH/N-doped reduced graphene oxide nanocomposite

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Sijia Wang,
  • Hao-Jun Zou,
  • Jie Sun,
  • Chong Lu,
  • Xue Gao,
  • Xingwei Han

摘要

γ-AlOOH nanoflakes decorated nitrogen-doped reduced graphene oxide (γ-AlOOH/N-rGO) nanocomposite was synthesized through a one-step microwave-assisted hydrothermal method in this work. The engineered heterogeneous porous architecture and doped N atoms provided abundant adsorption sites and optimized mass transfer pathways, enabling exceptional ciprofloxacin (CIP) removal capability with a maximum adsorption capacity of 1565.67 mg/g at 318 K. Adsorption isotherm analysis revealed close adherence to the Langmuir model, while kinetic studies demonstrated pseudo-first-order behavior. The doped pyrrolic-N and pyridinic-N served as vital active sites for CIP adsorption. Synergistic mechanisms, including hydrogen bonding, π-π electron-donor-acceptor interactions, surface complexation, and pore-filling, were identified as key contributors to the enhanced adsorption performance. γ-AlOOH/N-rGO maintained 88.29% removal efficiency after five regeneration cycles, demonstrating significant potential for antibiotic remediation in aqueous systems.

Graphical Abstract