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Surface amorphization oxygen vacancy-rich porous Sn3Ox nanosheets for boosted photoelectrocatalytic bacterial inactivation

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Abstract

Antibiotic misuse has resulted in the emergence of superbugs, warranting new antibacterial methods. Surface amorphisation oxygen vacancy-rich porous Sn3Ox nanosheets in situ grown on Ni foam are successfully designed via a simple, one-step hydrothermal method, resulting in enhanced photoelectrochemical (PEC) bacterial inactivation. In this system, the porous structure enriches its surface with oxygen vacancies, which can extend the absorption spectrum into the near-infrared region, while oxygen vacancies can enhance the separation of electron–hole pairs. Most importantly, the sheet-like porous structure enhances surface active sites and increase the contact area between bacteria and electrodes. Therefore, the reactive oxygen species produced during the PEC process can directly act on the surface of bacteria and is 100% effectively against drug-resistant Gram-positive and Gram-negative bacteria in water within 30 min. This study acts as a foundation for the development of novel photoelectrocatalyst electrodes for efficient water purification.

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摘要

细菌感染每年困扰着数百万人，已成为一个全球严峻的公共卫生问题。由于抗生素的滥用，出现了具有多重耐药性的“超级细菌”。因此，迫切需要开发杀菌的新试剂和新手段。光电催化抗菌是将光催化和电催化协同联用的新型化学方法，是一种绿色灭菌技术，具有杀菌效果好、无二次污染、稳定性高和广谱抗菌等特点。本工作中，通过简单的一步水热法在泡沫镍上原位生长了表面非晶化富氧空位的多孔 Sn3Ox 纳米片，具有增强的光电化学灭菌性能。在该系统中，Sn3Ox 多孔结构在其表面富集了氧空位，可以将吸收光谱从可见光扩展到近红外区域，而且氧空位也可以增强电子-空穴对的分离。最重要的是，片状多孔结构增加了表面活性位点，与细菌与电极之间的接触面积，光电化学灭菌过程中产生的活性氧自由基可以直接作用于细菌表面。在30 min内，能够100%的消灭水中的耐药菌。该研究为开发用于高效水净化的新型光电催化系统提供了指导

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Nos. 51732007 and 52272212), the Natural Science Foundation of Shandong Province (No. ZR2022JQ20).

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  1. Long-Wei Wang and Lin Liu have contributed equally to this work.

Authors and Affiliations

  1. Institute for Advanced Interdisciplinary Research (iAIR), School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China

    Long-Wei Wang, Lin Liu, Li-Wei Zhang, Na Ren, Hong Liu & Xin Yu

  2. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education School of Medicine, Northwest University, Xi’an, 710069, China

    Long-Wei Wang & Zhen You

  3. Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA

    Xiao-Di Zhang

  4. State Key Laboratory of Crystal Material, Shandong University, Jinan, 250100, China

    Hong Liu

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Wang, LW., Liu, L., You, Z. et al. Surface amorphization oxygen vacancy-rich porous Sn3Ox nanosheets for boosted photoelectrocatalytic bacterial inactivation. Rare Met. 42, 1508–1515 (2023). https://doi.org/10.1007/s12598-022-02208-6

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