Preparation of platinized strontium titanate covered with hollow silica and its activity for overall water splitting in a novel phase-boundary photocatalytic system

IKEDA, Shigeru; HIRAO, Ko; ISHINO, Satoru; MATSUMURA, Michio; OHTANI, Bunsho

Preparation of platinized strontium titanate covered with hollow silica and its activity for overall water splitting in a novel phase-boundary photocatalytic system

IKEDA, Shigeru; HIRAO, Ko; ISHINO, Satoru et al.

Catalysis Today, 2006, 117(1-3), 343-349

Permalink : https://hdl.handle.net/2115/48671

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アクセス権	open access
URI	https://hdl.handle.net/2115/48671
タイトル	Preparation of platinized strontium titanate covered with hollow silica and its activity for overall water splitting in a novel phase-boundary photocatalytic system
著者	IKEDA, Shigeru ; HIRAO, Ko ; ISHINO, Satoru ; MATSUMURA, Michio ; OHTANI, Bunsho
e-Rad_Researcher 40312417 著者名 IKEDA, Shigeru
著者名 HIRAO, Ko
著者名 ISHINO, Satoru
e-Rad_Researcher 20107080 著者名 MATSUMURA, Michio
e-Rad_Researcher 80176924 著者名 OHTANI, Bunsho
言語	英語
キーワード	Photocatalytic water splitting
	Platinum loaded photocatalysts
	Gas-water interface
	silica coating
	amphiphilicity
	core-shell structure
	void space
	backward reaction
	photostability
発行日	2006-09-30
出版者	Elsevier
収録物名	Catalysis Today
巻(号)	117(1-3)
ページ	343-349
抄録	Platinum-loaded strontium titanate (Pt-SrTiO3) (core) -silica (shell) powder was prepared by double-layer winding of a carbon and a silica layer on Pt-SrTiO3 followed by heat treatment to remove the carbon layer. Scanning electron microscope (SEM) observation and analyses of the BET surface area suggested that the powder has a void space between Pt-SrTiO3 (core) and silica (shell). When the surface of the powder was partially modified with a fluoroalkylsilylation agent, thus-obtained material assembled at a gas?water interface and acted as a photocatalyst for overall water splitting to produce hydrogen (H2) and oxygen (O2). Probably due to the suppression of a backward reaction, production of water from H2 and O2, on the platinum, the overall efficiency of this system was higher than that of the conventional suspension system. Moreover, while the Pt-SrTiO3 powders directly covered with fluoroalkylethylsilyl groups showed low photostability, i.e., prolonged irradiation precipitated some of the surface-modified particles in water owing to photocatalytic decomposition of surface fluoroalkylethylsilyl groups, this material could retain its location at the phase boundary.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0920-5861
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.cattod.2006.05.037