基于微观结构特性的多功能金属纳米线泡沫颗粒过滤研究
Microstructure-Dependent Particulate Filtration using Multifunctional Metallic Nanowire Foams
AI总结：
本研究开发了基于多孔金属纳米线泡沫的多功能过滤平台，探究微观结构对深亚微米颗粒过滤性能的影响，发现纳米线密度、直径等因素关键决定PM₀.₃捕获效率，且铜泡沫具备超高效抗菌性，为优化高效多功能过滤介质提供了新方向。
摘要：
COVID-19大流行凸显了开发适用于深亚微米尺寸范围的高效、耐用、可重复使用且可回收过滤介质的迫切需求。本文提出了一种采用多孔金属纳米线泡沫的多功能过滤平台，该平台高效、坚固、具有抗菌性且可重复使用，有望进一步抵御多种危害。我们研究了泡沫的微观结构，详细阐明了生长参数如何影响总表面积和特征尺寸，以及微观结构对过滤性能的影响。研究发现，电沉积过程中沉积在纳米线上的纳米颗粒可将表面积大幅提升至最高20 m²/g。出人意料的是，在高表面积区间内，纳米颗粒带来的总表面积增长与捕获效率的提升几乎没有相关性。然而，纳米线的密度和直径对PM₀.₃颗粒的捕获效率起着重要作用，纳米线纤维的表面粗糙度及其特征尺寸同样如此。对铜泡沫的抗菌测试显示，与泡沫接触30秒后，灭活效率超过99.9995%。这些结果为实现具有优化微观结构的高效多功能过滤平台指明了极具前景的方向。
英文摘要：
The COVID-19 pandemic has shown the urgent need for the development of efficient, durable, reusable and recyclable filtration media for the deep-submicron size range. Here we demonstrate a multifunctional filtration platform using porous metallic nanowire foams that are efficient, robust, antimicrobial, and reusable, with the potential to further guard against multiple hazards. We have investigated the foam microstructures, detailing how the growth parameters influence the overall surface area and characteristic feature size, as well as the effects of the microstructures on the filtration performance. Nanogranules deposited on the nanowires during electrodeposition are found to greatly increase the surface area, up to 20 m$^{2}$/g. Surprisingly, in the high surface area regime, the overall surface area gained from the nanogranules has little correlation with the improvement in capture efficiency. However, nanowire density and diameter play a significant role in the capture efficiency of PM$_{0.3}$ particles, as do the surface roughness of the nanowire fibers and their characteristic feature sizes. Antimicrobial tests on the Cu foams show a >99.9995% inactivation efficiency after contacting the foams for 30 seconds. These results demonstrate promising directions to achieve a highly efficient multifunctional filtration platform with optimized microstructures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
