Multifunctional nickel nanofiber for effective air purification: PM removal and NO reduction from automobile exhaust

Particulate matter and NO pollution caused by automobile exhaust cause severe air pollution and respiratory diseases. Traditional gasoline particulate filter and three-way catalysts face the problem of high cost and no resistance to high temperature. Development of multifunctional filtration purification media with low cost and temperature resistance is necessary. In this paper, Ni nanofibers filter is easily fabricated by electrospinning, suitable for working environment with variable temperature. Moreover, between adjacent nanofibers, the preferable fused junction was formed which is beneficial to mechanical properties of the filter. The Ni nanofibers filter exhibits outstanding PM1 and NO gas removal ability. The PM1 filtration efficiency up to 99.86% @300 nm was achieved under wing speed of 5.3 cm/s. Moreover, the Ni nanofibers also achieve impressive NO-to-N-2 and NO adsorption ability owing to the high specific surface area and activity of Ni nanofiber itself. As such, the multifunctional Ni nanofibers filter equips the potential for the actual application in automobile exhaust purification converter.

汽车尾气造成的颗粒物和一氧化氮污染会导致严重的空气污染和呼吸系统疾病。传统的汽油颗粒过滤器和三效催化剂面临着成本高，不耐高温的问题。有必要开发一种低成本，耐高温的多功能过滤净化介质。本文中，镍纳米纤维滤料很容易通过静电纺丝法制成，适用于温度变化的工作环境。而且，在相邻的纳米纤维之间，形成了有利于过滤器的机械性能的优选的熔融结。 Ni纳米纤维过滤器具有出色的PM1和NO去除能力。在5.3 cm / s的机翼速度下，在300 nm处实现了高达99.86％的PM1过滤效率。而且，由于Ni纳米纤维本身的高比表面积和活性，Ni纳米纤维还实现了令人印象深刻的NO-to-N-2和NO吸附能力。因此，多功能镍纳米纤维过滤器具有在汽车尾气净化转换器中实际应用的潜力。

Published: 2020

Journal ：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

Impact Factor：6.557

Paper link: https://link.springer.com/article/10.1007/s10853-020-04383-2