Multifunctional, self-cleaning air filters based on graphene-enhanced ceramic networks

Particulate air pollution takes an enormous toll on society; it is linked to more than 3 million deaths annually. Inaddition, airborne microorganisms can spread dangerous diseases, compounding the issue. A widely usedmethod for mitigating the risks of airborne particles is air filtration. While effective at particle removal, con-ventional air filters typically lack additional functionalities. They cannot inactivate accumulated contami-nants, and they require periodic replacement to remain safe. This work presents a multifunctional, self-clean-ing air-filtration system using a graphene-enhanced air filter medium (GeFM). The GeFM is capable ofcapturing >95% of microorganisms and particles >1 mm and can be repeatedly joule heated to >300C, re-generating the filter. Furthermore, the GeFM provides unique options for monitoring the airflow and loadingstatus of the filter. The GeFM can improve filter lifetime and safety, offering great potential for the develop-ment of advanced and likely more sustainable air-filtration solutions in the future.