| Title: | Plasmon-Enhanced Sub-Bandgap Photocatalysis via Triplet-Triplet Annihilation Upconversion for Volatile Organic Compound Degradation |
| Author(s): | Kim HI; Weon S; Kang H; Hagstrom AL; Kwon OS; Lee YS; Choi W; Kim JH; |
| Address: | "Department of Chemical and Environmental Engineering, School of Engineering and Applied Science, Yale University , New Haven, Connecticut 06511, United States. School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, Republic of Korea. Interdisciplinary Program in Nano-Science and Technology, Seoul National University , Seoul 08826, Republic of Korea. School of Chemical and Biological Engineering, Seoul National University , Seoul 08826, Republic of Korea" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "This study demonstrates the first reported photocatalytic decomposition of an indoor air pollutant, acetaldehyde, using low-energy, sub-bandgap photons harnessed through sensitized triplet-triplet annihilation (TTA) upconversion (UC). To utilize low-intensity noncoherent indoor light and maximize photocatalytic activity, we designed a plasmon-enhanced sub-bandgap photocatalyst device consisting of two main components: (1) TTA-UC rubbery polymer films containing broad-band plasmonic particles (Ag-SiO(2)) to upconvert sub-bandgap photons, and (2) nanodiamond (ND)-loaded WO(3) as a visible-light photocatalyst composite. Effective decomposition of acetaldehyde was achieved using ND/WO(3) (E(g) = 2.8 eV) coupled with TTA-UC polymer films that emit blue photons (lambda(Em) = 425 nm, 2.92 eV) upconverted from green photons (lambda(Ex) = 532 nm, 2.33 eV), which are wasted in most environmental photocatalysis. The overall photocatalytic efficiency was amplified by the broad-band surface plasmon resonance of AgNP-SiO(2) particles incorporated into the TTA-UC films" |
| Keywords: | Catalysis Light Photons *Silicon Dioxide *Volatile Organic Compounds; |
| Notes: | "MedlineKim, Hyoung-Il Weon, Seunghyun Kang, Homan Hagstrom, Anna L Kwon, Oh Seok Lee, Yoon-Sik Choi, Wonyong Kim, Jae-Hong eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2016/10/19 Environ Sci Technol. 2016 Oct 18; 50(20):11184-11192. doi: 10.1021/acs.est.6b02729. Epub 2016 Sep 29" |
