Degradable nanofiber for eco-friendly air filtration: Progress and perspectives

Air pollution has posed a great threat to public health around the globe. Filters can be considered the effective protective equipment to reduce the transmissions of aerosol particles. However, the widespread use of non-degradable filters created a massive disruption in the waste disposal system. Nanofiber filters can achieve high removal efficiency and low pressure drop simultaneously. Benefit from the advantages of degradability and environmental sustainability, degradable nanofiber filters are believed to be efficient filtration media for a sustainable ecosystem. Here, this review focuses on the state-of-the-art degradable nanofiber filters for the removal of particulate matter. According to the filter composition, diverse categories and desired filtration performance are introduced in detail. In addition, various functionalities of the degradable nanofiber filters are classified. Finally, we discuss and suggest several possible directions for future challenges. This review provides a comprehensive insight into environmentally friendly air filters, which can deal with future demands in a more sustainable fashion.