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Devices installed in cars or buildings, including air conditioners and air cleaners, have filters designed to filter pollutants in the air. However, the air filters themselves can become a reservoir for harmful bacteria, where deposited microorganisms can persist and multiply, posing a significant health risk. To solve this problem, a research team at the Korea Institute of Science and Technology, led by Dr. Woo Kyoung-ja, and worked together with Yonsei University’s mechanical engineering team led by Professor Hwang Jung -cough lead, has developed a new air filter. the system is coated with “silver nanoparticles”.
Air filter coated with silver nanoparticles (yellow) kills bacteria on contact, providing clean air (right)
The results were recently published September 17 in the Journal of Materials Chemistry, an international scientific journal published by the Royal Society of Chemistry (RSC). The work is titled, “Synthetic and rapid antibacterial activity of silver nanoparticle-decorated silica hybrid silica particles on an air purification system.”
To create the new air filtration system, silver “particles” measuring 1-2 nanometers (nm) were grown to 30 nm, and then the silver particles were coated on an air filter element. The team tested the antibacterial effectiveness of the filtration system using two types of bacteria: Escherichia coli and Staphylococcus epidermidis.
They found that the silver nanoparticles showed rapid antibacterial activity on contact, killing the bugs as if the particles were biting them with their teeth.
The image shows the air filter coated with silver nanoparticles that capture and kill bacteria
This research opens up great applications in the production of HEPA antibacterial air filters, fine filtration, and coarse filtration.
Reference source: Sohn JiAe
Silver nanoparticles coated air filter kills bacteria
more: Korea.net Staff Writer
