| Title: | Practical scale evaluation of a photocatalytic air purifier equipped with a Titania-zeolite composite bead filter for VOC removal and viral inactivation |
| Author(s): | Kim S; Kim S; Park HJ; Park S; Kim JY; Jeong YW; Yang HH; Choi Y; Yeom M; Song D; Lee C; |
| Address: | "Sensor Lab, Smart Device Team, Samsung Research, Samsung Electronics Co., Ltd., Seoul, 06756, Republic of Korea. R&D Team, Cosmo Catalysts Co., Ltd., Cheongju, 28438, Republic of Korea. Department of Pharmacy, Korea University, Sejong, 30019, Republic of Korea. School of Chemical Engineering, Institute of Chemical Process (ICP), Institute of Engineering Research, Seoul National University, Seoul, 08826, Republic of Korea. Electronic address: leechangha@snu.ac.kr" |
| DOI: | 10.1016/j.envres.2021.112036 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "A practical scale photocatalytic air purifier equipped with a TiO(2)/H-ZSM-5 composite bead filter was demonstrated to be able to effectively remove indoor volatile organic compounds (VOCs) and viruses with sustainable performances under UVA-LED illumination. TiO(2) hybridized with 5 wt% H-ZSM-5 zeolite significantly enhanced its photocatalytic activity for degrading VOCs including formaldehyde, acetaldehyde, and toluene, than bare TiO(2). H-ZSM-5 provided strong adsorption sites for these compounds, thus accelerating their photocatalytic conversion into CO(2) by adjacent TiO(2) photocatalyst. Moreover, owing to its superior adsorption capacity, the composite bead filter completely prevented the emission of formaldehyde produced by photocatalytic oxidation of toluene. The sustainability of this composite bead filter for VOC removal was confirmed by regeneration and accelerated durability tests. In addition, the photocatalytic air purifier was effective in removing aerosolized viral particles of bacteriophage Phi-X 174. It was confirmed that the viruses on filter surfaces were completely inactivated by photocatalytic oxidation. TiO(2)/H-ZSM-5 composite beads also exhibited excellent efficacies for inactivation of pathogenic coronaviruses including SARS-CoV-2. The photocatalytic process degraded viral RNAs of SARS-CoV-2 by more than 99.999% in 1 h, eliminating the viral infectivity. Results of this study suggest that the air purifier equipped with the composite bead filter is ready for practical applications for home and hospital uses" |
| Keywords: | *Air Filters *covid-19 Catalysis Humans SARS-CoV-2 Titanium Virus Inactivation *Volatile Organic Compounds *Zeolites Air purification Photocatalysis Titania Viral inactivation Volatile organic compound; |
| Notes: | "MedlineKim, Sungwon Kim, Saemi Park, Hee-Jin Park, Soomin Kim, Jee Yeon Jeong, Yong Won Yang, Hae Heon Choi, Youngsup Yeom, Minjoo Song, Daesub Lee, Changha eng Research Support, Non-U.S. Gov't Netherlands 2021/09/17 Environ Res. 2022 Mar; 204(Pt B):112036. doi: 10.1016/j.envres.2021.112036. Epub 2021 Sep 14" |
