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Bioinspired artificial spider silk photocatalyst for the high-efficiency capture and inactivation of bacteria aerosols

Author

Listed:
  • Linghui Peng

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Haiyu Wang

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Guiying Li

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Zhishu Liang

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Weiping Zhang

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Weina Zhao

    (Guangdong University of Technology
    Guangdong University of Technology)

  • Taicheng An

    (Guangdong University of Technology
    Guangdong University of Technology)

Abstract

Bioaerosol can cause the spread of disease, and therefore, capture and inactivation of bioaerosols is desirable. However, filtration systems can easily become blocked, and are often unable to inactivate the bioaerosol once it is captured. Herein, we reported a bioinspired artificial spider silk (ASS) photocatalyst, consisting of a periodic spindle structure of TiO2 on nylon fiber that can efficiently capture and concentrate airborne bacteria, followed by photocatalytic inactivation in situ, without a power-supply exhaust system. The ASS photocatalyst exhibits a higher capture capacity than the nylon fiber substrate and a photocatalytic inactivation efficiency of 99.99% obtained under 4 h irradiation. We found that the capture capacity of the ASS photocatalyst can be mainly attributed to the synergistic effects of hydrophilicity, Laplace pressure differences caused by the size of the spindle knots and surface energy gradients induced by surface roughness. The bacteria captured by the ASS photocatalyst are inactivated by photocatalysis within droplets or at the air/photocatalyst interfaces. This strategy paves the way for constructing materials for bioaerosol purification.

Suggested Citation

  • Linghui Peng & Haiyu Wang & Guiying Li & Zhishu Liang & Weiping Zhang & Weina Zhao & Taicheng An, 2023. "Bioinspired artificial spider silk photocatalyst for the high-efficiency capture and inactivation of bacteria aerosols," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38194-1
    DOI: 10.1038/s41467-023-38194-1
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    References listed on IDEAS

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    1. Ping Li & Jiazhen Li & Xiao Feng & Jie Li & Yuchen Hao & Jinwei Zhang & Hang Wang & Anxiang Yin & Junwen Zhou & Xiaojie Ma & Bo Wang, 2019. "Metal-organic frameworks with photocatalytic bactericidal activity for integrated air cleaning," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    2. Ye Tian & Pingan Zhu & Xin Tang & Chunmei Zhou & Jianmei Wang & Tiantian Kong & Min Xu & Liqiu Wang, 2017. "Large-scale water collection of bioinspired cavity-microfibers," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    3. Yongmei Zheng & Hao Bai & Zhongbing Huang & Xuelin Tian & Fu-Qiang Nie & Yong Zhao & Jin Zhai & Lei Jiang, 2010. "Directional water collection on wetted spider silk," Nature, Nature, vol. 463(7281), pages 640-643, February.
    4. Thi Tham Nguyen & Graham R. Johnson & Scott C. Bell & Luke D. Knibbs, 2022. "A Systematic Literature Review of Indoor Air Disinfection Techniques for Airborne Bacterial Respiratory Pathogens," IJERPH, MDPI, vol. 19(3), pages 1-12, January.
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