Plasmon-Enhanced Sub-Bandgap Photocatalysis via Triplet–Triplet Annihilation Upconversion for Volatile Organic Compound Degradation
SCIE
SCOPUS
- Title
- Plasmon-Enhanced Sub-Bandgap Photocatalysis via Triplet–Triplet Annihilation Upconversion for Volatile Organic Compound Degradation
- Authors
- Hyoung-il Kim; Seunghyun Weon; Homan Kang; Anna L. Hagstrom; Oh Seok Kwon; Yoon-Sik Lee; Choi, W; Jae-Hong Kim
- Date Issued
- 2016-10-18
- Publisher
- AMER CHEMICAL SOC
- 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-SiO2) to upconvert sub-bandgap photons, and (2) nanodiamond (ND)-loaded WO3 as a visible-light photocatalyst composite. Effective decomposition of acetaldehyde was achieved using ND/WO3 (E-g = 2.8 eV) coupled with TTA-UC polymer films that emit blue photons (lambda(Ex) = 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-SiO2 particles incorporated into the TTA-UC films.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/38138
- DOI
- 10.1021/ACS.EST.6B02729
- ISSN
- 0013-936X
- Article Type
- Article
- Citation
- Environmental Science & Technology, vol. 50, no. 20, page. 11184 - 11192, 2016-10-18
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