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Corn husk (CH) was utilized for the multifunctional magnetic-silver/biochar material (M-Ag/CHB). A magnetic corn husk biochar with colloidal Fe2O3 particles embedded in porous biochar matrix was fabricated via thermal pyrolysis of FeCl3 treated biomass. Then, the synthesis of magnetic silver-biochar material using AgNO3 solution as silver source and polyphenol extracted from green tea as a reducing agent. Their structure and morphology were characterized by X-ray diffraction (XRD) and brunauer-emmett-teller (BET) specific surface area and Fourier transform infrared spectroscopy (FTIR). The results showed that the magnetic-silver nanoparticles were loaded onto the biochar successfully have larger specific surface area than initial biochar. Their antibacterial activity against Escherichia coli (E. coli) was examined by tablet colony counting method and optical density (OD) method. The results showed that the magnetic-silver-biochar composites were more effective and had superior antibacterial performance than initial biochar which indicated that magnetic-silver-biochar composites have good application prospect in antibacterial field.

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Developing of Magnetic-Ag-Biochar Composite Derived from Corn Husk and Their Antibacterial Activity Against Escherichia Coli

  • 会议论文

  • 发表日期：

    2025年

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  • Paphada Pathomnatikul,
  • Chottiwaad Siriprachote,
  • Gulsara Panyam,
  • Chanyanut Thammasit,
  • Sakdinun Nuntang

摘要

Corn husk (CH) was utilized for the multifunctional magnetic-silver/biochar material (M-Ag/CHB). A magnetic corn husk biochar with colloidal Fe2O3 particles embedded in porous biochar matrix was fabricated via thermal pyrolysis of FeCl3 treated biomass. Then, the synthesis of magnetic silver-biochar material using AgNO3 solution as silver source and polyphenol extracted from green tea as a reducing agent. Their structure and morphology were characterized by X-ray diffraction (XRD) and brunauer-emmett-teller (BET) specific surface area and Fourier transform infrared spectroscopy (FTIR). The results showed that the magnetic-silver nanoparticles were loaded onto the biochar successfully have larger specific surface area than initial biochar. Their antibacterial activity against Escherichia coli (E. coli) was examined by tablet colony counting method and optical density (OD) method. The results showed that the magnetic-silver-biochar composites were more effective and had superior antibacterial performance than initial biochar which indicated that magnetic-silver-biochar composites have good application prospect in antibacterial field.