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<p>The graphene oxide prepared through the modified Hummers method was subsequently reduced using methanolic extract of <i>Aerva lanata</i> (L.) to obtain the reduced graphene oxide. The formation of <i>A. lanata</i>-derived reduced graphene oxide and the total phenols were assessed. To evaluate the efficiency, the antioxidant potential of the <i>A. lanata</i> extract was also tested using a 2,2-diphenyl-1-picrylhydrazyl assay; its IC50 value was then calculated. The <i>A. lanata</i>-derived reduced graphene oxide was characterized using X-ray diffraction, UV–Vis spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. The micro structural and morphological investigations of the samples were performed using high-resolution transmission electron microscopy and scanning electron microscopy with energy-dispersive X-ray spectroscopic measurements. Furthermore, the thermal properties were investigated through thermogravimetric analysis and thermal conductivity measurements that indicated improved thermal stability and enhanced thermal conductivity for the synthesized reduced graphene oxide over graphene oxide. The study revealed remarkable enhancement in antibacterial activity for the synthesized reduced graphene oxide against both Gram-negative and Gram-positive bacteria.</p>

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Aerva lanata-Derived Reduced Graphene Oxide: Synthesis, Microstructural, Thermal and Antibacterial Studies

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • Shibi Krishnan,
  • Arun S. Prasad

摘要

The graphene oxide prepared through the modified Hummers method was subsequently reduced using methanolic extract of Aerva lanata (L.) to obtain the reduced graphene oxide. The formation of A. lanata-derived reduced graphene oxide and the total phenols were assessed. To evaluate the efficiency, the antioxidant potential of the A. lanata extract was also tested using a 2,2-diphenyl-1-picrylhydrazyl assay; its IC50 value was then calculated. The A. lanata-derived reduced graphene oxide was characterized using X-ray diffraction, UV–Vis spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. The micro structural and morphological investigations of the samples were performed using high-resolution transmission electron microscopy and scanning electron microscopy with energy-dispersive X-ray spectroscopic measurements. Furthermore, the thermal properties were investigated through thermogravimetric analysis and thermal conductivity measurements that indicated improved thermal stability and enhanced thermal conductivity for the synthesized reduced graphene oxide over graphene oxide. The study revealed remarkable enhancement in antibacterial activity for the synthesized reduced graphene oxide against both Gram-negative and Gram-positive bacteria.