https://phys.org/news/2018-05-air-purification-technology-eradicate-airborne.html

Professor Jaesung Jang and Dr. Jeonghyun Kim in the School of Mechanical, Aerospace and Nuclear Engineering at UNIST have introduced the next-generation of air purification technology, using the vacuum ultraviolet (VUV) and [hotocatalysis. The new technique can inactivate airborne viruses towards a flow-through indoor air purifier, having short irradiation time. This breakthrough has been published in Aerosol Science and Technology on February 13, 2018.

The UV radiation below 200nm, named VUV is an effective bactericidal option against airborne disease viruses. Nevertheless, the use of VUV light has been limited by the creation of toxic ozone. Such issue has been solved by adding an extra UV photocatalysis system within the device.