Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 33, Pages 16983-16989Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp403855p
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [23560935]
- Japan Society for the Promotion of Science (JSPS)
- Grants-in-Aid for Scientific Research [13J07957, 23560935] Funding Source: KAKEN
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Gold (Au) nanoparticles supported on titania (TiO2) and ceria have been applied to a visible-light-responding plasmonic photocatalyst and functionalization of Au/TiO2 photocatalysts with cocatalysts were achieved by separate loading of Au nanoparticles and cocatalyst nanoparticles without alloying and nanoparticle coagulation. Here we report effectiveness of another functionalization by formation of a core-shell structure in photocatalytic reaction induced by SPR of Au/TiO2. Newly functionalized core-shell gold-palladium particles supported on TiO2 (Au@Pd/TiO2) were successfully prepared by using a two-step photodeposition method, and Au@Pd/TiO2 with a shell thickness of 1.0 nm quantitatively converted chlorobenzene and 2-propanol to benzene and acetone under irradiation of visible light. Thickness control of the Pd shell was very important for both a satisfactory cocatalyst effect and absorption due to SPR of Au nanoparticles. The results of this study provide useful information for design of functionalization of plasmonic photocatalysts by formation of a core-shell structure.
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