| Title: | Active 001 Facet Exposed TiO(2) Nanotubes Photocatalyst Filter for Volatile Organic Compounds Removal: From Material Development to Commercial Indoor Air Cleaner Application |
| Author(s): | Weon S; Choi E; Kim H; Kim JY; Park HJ; Kim SM; Kim W; Choi W; |
| Address: | "Division of Environmental Science and Engineering , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Korea. Frontier Research Team, Samsung Research , Samsung Electronics Company , Seoul 06765 , Korea. Department of Chemical and Biological Engineering, College of Engineering , Sookmyung Women's University , Seoul 04310 , Korea" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "TiO(2) nanotubes (TNT) have a highly ordered open structure that promotes the diffusion of dioxygen and substrates onto active sites and exhibit high durability against deactivation during the photocatalytic air purification. Herein, we synthesized 001 facet-exposed TiO(2) nanotubes (001-TNT) using a new and simple method that can be easily scaled up, and tested them for the photocatalytic removal of volatile organic compounds (VOCs) in both a laboratory reactor and a commercial air cleaner. While the surface of TNT is mainly composed of 101 facet anatase, 001-TNT's outer surface was preferentially aligned with 001 facet anatase. The photocatalytic degradation activity of toluene on 001-TNT was at least twice as high as that of TNT. While the TNT experienced a gradual deactivation during successive cycles of photocatalytic degradation of toluene, the 001-TNT did not exhibit any sign of catalyst deactivation under the same test conditions. Under visible light irradiation, the 001-TNT showed degradation activity for acetaldehyde and formaldehyde, while the TNT did not exhibit any degradation activity for them. The 001-TNT filter was successfully scaled up and installed on a commercial air cleaner. The air cleaner equipped with the 001-TNT filters achieved an average VOCs removal efficiency of 72% (in 30 min of operation) in a 8-m(3) test chamber, which satisfied the air cleaner standards protocol (Korea) to be the first photocatalytic air cleaner that passed this protocol" |
| Keywords: | Catalysis *Nanotubes Republic of Korea Titanium Toluene *Volatile Organic Compounds; |
| Notes: | "MedlineWeon, Seunghyun Choi, Eunji Kim, Hyejin Kim, Jee Yeon Park, Hee-Jin Kim, Sae-Mi Kim, Wooyul Choi, Wonyong eng Research Support, Non-U.S. Gov't 2018/07/13 Environ Sci Technol. 2018 Aug 21; 52(16):9330-9340. doi: 10.1021/acs.est.8b02282. Epub 2018 Jul 31" |
