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<p>Although the use of seawater is vital for future water resources, the majority of marine bacteria in seawater pose risks to human and animal health. It is therefore crucial to develop antibacterial membranes with high sterilization efficiency and low cost, especially if the membranes can use sunlight as a renewable source of energy. The composite Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>@PEI/Ag was prepared by in-situ reduction of silver nanoparticles (AgNPs) onto nanosheets of the MXene Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> coated with polyethyleneimine (PEI). The composite exhibits enhanced photothermal conversion efficiency of 22.67% due to roughness of the surface and local plasmon effect of silver nanoparticles (AgNPs) combined with the photothermal properties and thermal conductivity of the Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> nanosheets. The resulting composite Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>@PEI/Ag was then deposited on filter paper to yield the membrane, which was capable of reaching temperatures up to 48.7&#xa0;°C for 50&#xa0;s after a single irradiation with sunlight, with stability maintained after four cycles. In antibacterial assays for marine bacteria, the bacterial survival rate in seawater applied to the membrane was 18% in the absence of light and the bacteria were eliminated entirely on exposure to light. The sterilization rate was close to 100% in all five cycles and there was no leakage of silver ions.</p> Graphical Abstract <p></p>

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Design of an Efficient, Low-Cost and High Photothermal Conversion Antibacterial Membrane for Seawater Using a Ti3C2Tx MXene Composite with Polyethyleneimine and Silver Nanoparticles

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • Jingyue Zhang,
  • Haoge Cheng,
  • Ahmad Abd-El-Aziz,
  • Xinyue Zhang,
  • Ning Ma,
  • Alaa S. Abd-El-Aziz

摘要

Although the use of seawater is vital for future water resources, the majority of marine bacteria in seawater pose risks to human and animal health. It is therefore crucial to develop antibacterial membranes with high sterilization efficiency and low cost, especially if the membranes can use sunlight as a renewable source of energy. The composite Ti3C2Tx@PEI/Ag was prepared by in-situ reduction of silver nanoparticles (AgNPs) onto nanosheets of the MXene Ti3C2Tx coated with polyethyleneimine (PEI). The composite exhibits enhanced photothermal conversion efficiency of 22.67% due to roughness of the surface and local plasmon effect of silver nanoparticles (AgNPs) combined with the photothermal properties and thermal conductivity of the Ti3C2Tx nanosheets. The resulting composite Ti3C2Tx@PEI/Ag was then deposited on filter paper to yield the membrane, which was capable of reaching temperatures up to 48.7 °C for 50 s after a single irradiation with sunlight, with stability maintained after four cycles. In antibacterial assays for marine bacteria, the bacterial survival rate in seawater applied to the membrane was 18% in the absence of light and the bacteria were eliminated entirely on exposure to light. The sterilization rate was close to 100% in all five cycles and there was no leakage of silver ions.

Graphical Abstract