Journal
ACS CATALYSIS
Volume 1, Issue 10, Pages 1441-1447Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs200320h
Keywords
photocatalysis; plasmon enhancement; titanium dioxide; silver; predictive model
Categories
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [FG-02-05ER15686]
- NSF, Division of Chemistry [1111770]
- DuPont
- Camille & Henry Dreyfus Foundation
- Direct For Mathematical & Physical Scien [1111770] Funding Source: National Science Foundation
- Division Of Chemistry [1111770] Funding Source: National Science Foundation
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We demonstrate the design of composite plasmonic metal/semiconductor photocatalysts which show enhanced visible light photocatalytic activity compared to the semiconductor alone. We show that the overlap between the illumination source spectrum, semiconductor absorbance spectrum and metal nanoparticle surface plasmon resonance spectrum provides a useful descriptor for predicting the relative rate enhancements induced by metal surface plasmons composite photocatalysts with similar arrangements of metal and semiconductor building blocks. We also show that optical simulations can be used to predict the value of the descriptor of photocatalytic activity for any arbitary combination of illumination source, semiconductor, and plasmic metal, and therefore guide the formulation of optimal composite photocatalysts. We have used optical simulations to identity optimal plasmonic nanostructures for a few model semiconductors.
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