Visible-light photodecomposition of acetaldehyde by TiO2-coated gold nanocages: plasmon-mediated hot electron transport via defect states

Rajesh Kodiyath; Maidhily Manikandan; Lequan Liu; Gubbala V. Ramesh; Satoshi Koyasu; Masahiro Miyauchi; Yoshiki Sakuma; Toyokazu Tanabe; Takao Gunji; Thang Duy Dao; Shigenori Ueda; Tadaaki Nagao; Jinhua Ye; Hideki Abe

doi:10.1039/C4CC06229A

Visible-light photodecomposition of acetaldehyde by TiO₂-coated gold nanocages: plasmon-mediated hot electron transport via defect states†

Rajesh Kodiyath,*^a Maidhily Manikandan,^ab Lequan Liu,^ad Gubbala V. Ramesh,^a Satoshi Koyasu,^c Masahiro Miyauchi,^c Yoshiki Sakuma,^g Toyokazu Tanabe,^ae Takao Gunji,^e Thang Duy Dao,^dhi Shigenori Ueda,^f Tadaaki Nagao,^d Jinhua Ye^ad and Hideki Abe*^a

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* Corresponding authors

^a Environmental Remediation Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
E-mail: KODIYATH.Rajesh@nims.go.jp, ABE.Hideki@nims.go.jp

^b Crystal Growth Centre, Anna University, Chennai, Tamil Nadu 600-025, India

^c Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan

^d International Center for Materials Nanoarchitectonics (WPI-MANA), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^e Kanagawa University, 3-27 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan

^f Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo, Japan

^g Photonic Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^h CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

ⁱ Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan

Abstract

Skeletal gold nanocages (Au NCs) are synthesized and coated with TiO₂ layers (TiO₂–Au NCs). The TiO₂–Au NCs exhibit enhanced photodecomposition activity toward acetaldehyde under visible light (>400 nm) illumination because hot electrons are generated over the Au NCs by local surface plasmon resonance (LSPR) and efficiently transported across the metal/semiconductor interface via the defect states of TiO₂.

Chemical Communications

Visible-light photodecomposition of acetaldehyde by TiO₂-coated gold nanocages: plasmon-mediated hot electron transport via defect states†

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Visible-light photodecomposition of acetaldehyde by TiO₂-coated gold nanocages: plasmon-mediated hot electron transport via defect states

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