Department of Physics, Georgetown University, Washington, D.C. 20057, United States.
Department of Physics, University of California, Davis, California 95616, United States.
Nano Lett. 2021 Apr 14;21(7):2968-2974. doi: 10.1021/acs.nanolett.1c00050. Epub 2021 Mar 24.
The ongoing COVID-19 pandemic highlights the severe health risks posed by deep submicrometer-sized airborne viruses and particulates in the spread of infectious diseases. There is an urgent need for the development of efficient, durable, and reusable filters for this size range. Here we report the realization of efficient particulate filters using nanowire-based low-density metal foams which combine extremely large surface areas with excellent mechanical properties. The metal foams exhibit outstanding filtration efficiencies (>96.6%) in the PM regime, with the potential for further improvement. Their mechanical stability, light weight, chemical and radiation resistance, ease of cleaning and reuse, and recyclability further make such metal foams promising filters for combating COVID-19 and other types of airborne particulates.
正在持续的 COVID-19 大流行凸显了在传染病传播过程中，深亚微米级空气传播病毒和颗粒带来的严重健康风险。因此，迫切需要开发针对该尺寸范围的高效、耐用且可重复使用的过滤器。在这里，我们报告了使用基于纳米线的低密度金属泡沫实现高效微粒过滤器，该金属泡沫结合了极高的表面积和优异的机械性能。金属泡沫在 PM 范围内表现出出色的过滤效率（>96.6%），并且具有进一步提高的潜力。它们的机械稳定性、重量轻、耐化学性和耐辐射性、易于清洁和重复使用以及可回收性，使这种金属泡沫成为对抗 COVID-19 和其他类型空气传播颗粒的有前途的过滤器。
