Antibacterial performance of a novel photocatalytic-coated cordierite foam for use in air cleaners.

摘要: Abstract A novel titanium dioxide-coated cordierite foam (TiO 2 /cordierite foam) was developed for use in air cleaners. By a simple impregnation procedure, TiO nanoparticles were immobilized firmly onto the surface of substrate through high-temperature (500 °C) calcination. The strong bactericidal performance fabricated evaluated by newly test method complex three-dimensional through-pore structures. This could trace 5–6 log units decrease bacterial cell numbers an environment, thus meeting criteria both JIS and ISO standard methods. With 0.25 mW cm −2 UV-A irradiation 24 h, rate exceeded 99.9% five types airborne or droplet-based infectious pathogens: Escherichia coli ( E. ), Pseudomonas aeruginosa P. Legionella pneumophila L. Klebsiella pneumoniae K. methicillin-resistant Staphylococcus aureus (MRSA). results repeat testing, where same sample used three times, revealed that maintained at second third use, indicating possesses long-term action. also exhibited high photocatalytic degradation capability on gaseous acetaldehyde, which is associated with sick building syndrome, volatile organic compounds to generate CO H O. demonstrated -coated has great potential air-cleaning filters not only remove pathogens droplets, but decontaminating deodorizing functionality.