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<p>A SnO<sub>2</sub>-loaded ZnO-modified carbon foam (SnO<sub>2</sub>@ZnO/CF) nanocomposite was fabricated via a one-pot, facile coprecipitation route. The characterization of SnO<sub>2</sub>@ZnO/CF nanocomposite was done by FTIR, XRD, TGA, SEM, and EDX. The characterization results confirmed the functional groups, crystalline structure, thermal stability, morphology, and presence of elements. The as-prepared SnO<sub>2</sub>@ZnO/CF nanocomposite demonstrated high efficiency in degrading the methylene blue (MB) dye in the presence of daylight radiation compared to the individual SnO<sub>2</sub> and ZnO/CF nanocomposites. To enhance the photocatalytic activity of the SnO<sub>2</sub>@ZnO/CF nanocomposite catalyst, the amount of light exposure and the concentration of MB were optimized. The SnO<sub>2</sub>@ZnO/CF nanocomposite suppressed the charge recombination and enhanced the charge separation, due to which 100% degradation of 30 ppm MB dye after 80 min of sunlight exposure was observed. After several cycles of reuse, the nanocomposite maintained its activity and showed a degradation rate of approximately 92%. Antibacterial activity was evaluated against gram-negative (<i>Escherichia coli</i>) and gram-positive (<i>Bacillus subtilis</i>) bacteria. The high antibacterial activity of the SnO<sub>2</sub>@ZnO/CF nanocomposite is attributed to the production of reactive oxygen species (ROS) and the liberation of the metal ions. These reactive species destroy and eliminate the bacteria’s cell walls.</p>

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SnO2@ZnO Modified Carbon Foam Nanocomposite for Efficient Dye Degradation and Antibacterial Activity

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Azeem Rana,
  • Raheela Ramzan,
  • Khalaf M. Alenezi,
  • Abdulmohsen K. D. Alsukaibi,
  • Muhammad Arif,
  • Jamal R. Humaidi

摘要

A SnO2-loaded ZnO-modified carbon foam (SnO2@ZnO/CF) nanocomposite was fabricated via a one-pot, facile coprecipitation route. The characterization of SnO2@ZnO/CF nanocomposite was done by FTIR, XRD, TGA, SEM, and EDX. The characterization results confirmed the functional groups, crystalline structure, thermal stability, morphology, and presence of elements. The as-prepared SnO2@ZnO/CF nanocomposite demonstrated high efficiency in degrading the methylene blue (MB) dye in the presence of daylight radiation compared to the individual SnO2 and ZnO/CF nanocomposites. To enhance the photocatalytic activity of the SnO2@ZnO/CF nanocomposite catalyst, the amount of light exposure and the concentration of MB were optimized. The SnO2@ZnO/CF nanocomposite suppressed the charge recombination and enhanced the charge separation, due to which 100% degradation of 30 ppm MB dye after 80 min of sunlight exposure was observed. After several cycles of reuse, the nanocomposite maintained its activity and showed a degradation rate of approximately 92%. Antibacterial activity was evaluated against gram-negative (Escherichia coli) and gram-positive (Bacillus subtilis) bacteria. The high antibacterial activity of the SnO2@ZnO/CF nanocomposite is attributed to the production of reactive oxygen species (ROS) and the liberation of the metal ions. These reactive species destroy and eliminate the bacteria’s cell walls.