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Nanowire-structured titanate with anatase titania : Characterization and photocatalytic activity

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Title: Nanowire-structured titanate with anatase titania : Characterization and photocatalytic activity
Authors: Amano, Fumiaki Browse this author →KAKEN DB
Yasumoto, Taikei Browse this author
Shibayama, Tamaki Browse this author
Uchida, Satoshi Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Keywords: Potassium titanate
Nanowire
Anatase
Titanium oxide
Photodegradation
Oxidative decomposition
Mineralization
Hydrogen evolution
Photodeposition
Issue Date: 15-Jul-2009
Publisher: Elsevier B.V.
Journal Title: Applied Catalysis B : Environmental
Volume: 89
Issue: 3-4
Start Page: 583
End Page: 589
Publisher DOI: 10.1016/j.apcatb.2009.01.013
Abstract: Nanowire-structured titanate with titanium(IV) oxide (titania) was obtained by calcination of potassium ion-containing titanate nanowires prepared through alkali treatment of titania nanoparticles. The presence of potassium ions in the as-synthesized titanate nanowires was required for maintenance of the nanowire structure under the conditions of post heat treatment. The crystallite structure, composition, morphology, specific surface area, pore volume distribution, and optical properties were found to be dependent on the temperature at which titanate nanowires were calcined. Photocatalytic activity was examined using three probe reactions: oxidative decomposition of acetic acid in an aqueous solution, oxygen liberation from an aqueous silver sulfate solution, and hydrogen liberation from an aqueous methanol solution in the presence of hexachloroplatinic acid as a precursor of photodeposition of platinum particles. Detailed characterization and results of photocatalytic activity tests revealed that titanate crystallites greatly contributed to the photocatalytic activities of the calcined nanowires except for photocatalytic hydrogen liberation. It was found that platinum was preferentially photodeposited on anatase crystallites rather than on titanate crystallites for hydrogen liberation.
Type: article (author version)
URI: http://hdl.handle.net/2115/44873
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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