Active {001} Facet Exposed TiO2 Nanotubes Photocatalyst Filter for Volatile Organic Compounds Removal: From Material Development to Commercial Indoor Air Cleaner Application

Environmental Science & Technology
Seunghyun WeonWonyong Choi

Abstract

TiO2 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 TiO2 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 ...Continue Reading

References

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Dec 22, 2016·Chemical Communications : Chem Comm·Peng ZhouJincai Zhao

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Citations

Apr 2, 2019·ACS Applied Materials & Interfaces·Anna L HagstromJae-Hong Kim
Aug 21, 2021·Journal of Hazardous Materials·Biyuan LiuHaibao Huang
Dec 4, 2019·Environmental Science & Technology·Jonghun LimWonyong Choi
Oct 26, 2021·Advanced Science·Min ZhouWingkei Ho

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