Functionalization of Au/TiO2 Plasmonic Photocatalysts with Pd by Formation of a Core鈥揝hell Structure for Effective Dechlorination of Chlorobenzene under Irradiation of Visible Light

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• 作者：Atsuhiro Tanaka ; Kojirou Fuku ; Takuya Nishi ; Keiji Hashimoto ; Hiroshi Kominami
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：August 22, 2013
• 年：2013
• 卷：117
• 期：33
• 页码：16983-16989
• 全文大小：355K
• 年卷期：v.117,no.33(August 22, 2013)
• ISSN：1932-7455

文摘

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鈥搒hell structure in photocatalytic reaction induced by SPR of Au/TiO₂. Newly functionalized core鈥搒hell gold鈥損alladium 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鈥搒hell structure.