Progress on particulate matter filtration technology: Basic concepts, advanced materials, and performances
PM (particulate matter)-induced haze problem has caused serious environment and health concerns. It is still a huge challenge to control PM pollution because of the complex structure, diverse sources and intricate evolution mechanism of the particles. In recent years, there has been increasing effort to develop advanced strategies for PM treatment. Herein, we wish to provide a systematic summary of recent progress in air filtration. The review cover PMs definition, the characterization of PMs, the mechanism of PMs capture, advanced purification materials, and special multifunctional performances. As for characterizing PM particles, removal efficiency, pressure drop, flow rate, quality factor and optical transparency are the basic parameters. For the advanced filters with excellent filtration performance, some special properties such as thermal stability, antibacterial property, flame retardance, recyclability and special wettability are in great need under certain extreme conditions. Finally, some future prospect for filtration materials like materials choosing and structure designing, are also discussed.
- This article is part of the themed collection: Recent Review Articles