Abstract
Titanium dioxide (TiO2) is commonly used for photocatalytic decomposition of organic contaminants for the purpose of water purification. One promising method to enhance TiO2 photocatalysis is the incorporation of surface plasmon resonance on its surface where photocatalytic reactions take place. Herein, a novel methodology using plasmonically tuned aluminum nanostructures to enhance the rate of photodecomposition of aqueous methyl orange is demonstrated. These nanostructures are tuned to the TiO2 band gap in the UV regime and patterned on TiO2-coated substrates using nanosphere lithography. Compared to a blank TiO2 film, the plasmonics is found to enhance the initial TiO2 photocatalytic rate by up to 10 times, and further enhancement is possible upon refinement of the plasmonic technology.
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