Polypropylene nonwoven loaded with cerium-doped manganese oxides submicron particles for ozone decomposition and air filtration

Air pollution caused by particulate matter (PM) and ozone poses a serious threat to human health. The key to eliminating this threat is to develop a multifunctional material with ozone and PM removal capabilities. A novel composite material (Ce-OMS-2/PP-g-AA) composed of surface carboxylation polypropylene nonwoven (PP-g-AA) and cerium-doped manganese oxides particles (Ce-OMS-2) have been prepared by ultraviolet (UV) grafting polymerization and self-assembly methods. The effects of self-assembly processes such as particle concentration and the grafting degree of PP nonwoven were investigated. The Ce-OMS-2/PP-g-AA composite material with a lower average valance of Mn exhibited a stable > 98.82% conversion efficiency for 500 ppb O3 at a relative humidity (RH) of 45%, and a space velocity of 600 L·g−1·h−1 after 36 h at room temperature. Furthermore, the Ce-OMS-2/PP-g-AA composite material achieved a better PM filtration efficiency (80.1%) than the PP-g-AA nonwoven. It was concluded that the Ce-OMS-2/PP-g-AA could be applied in personal protection and air purification in a complex contaminant environment invcomposite nonwoven olving ozone and PM.

由颗粒物（PM）和臭氧引起的空气污染严重威胁着人类健康。消除这种威胁是有必要的，在这里，我们开发了一种具有臭氧和PM去除功能的多功能材料。通过表面羧化聚丙烯无纺布（PP-g-AA）和铈掺杂的锰氧化物颗粒（Ce-OMS-2）组成的新型复合材料（Ce-OMS-2 / PP-g-AA）已经通过紫外线（ UV）接枝聚合和自组装方法。研究了聚丙烯无纺布颗粒浓度和接枝度等自组装过程的影响。 Mn的平均化合价较低的Ce-OMS-2 / PP-g-AA复合材料在相对湿度（RH）为45％且空速为600时对500 ppb O3表现出稳定的> 98.82％的转化效率在室温下36小时后L·g-1·h-1。此外，Ce-OMS-2 / PP-g-AA复合材料比PP-g-AA非织造布具有更好的PM过滤效率（80.1％）。结论是，Ce-OMS-2 / PP-g-AA复合无纺布可用于涉及臭氧和PM的复杂污染物环境中的个人防护和空气净化。

Published: 2021

Journal：SEPARATION AND PURIFICATION TECHNOLOGY

Impact Factor：6.195

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S1383586621000344#kg005