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- W2043977367 abstract "A series of titanate pyrochlore Ln 2 Ti 2 O 7 (Ln = Eu-Lu) was prepared by a polymerized complex method and evaluated as a photocatalyst for water splitting reaction. All the Ln 2 Ti 2 O 7 , except for Tb 2 Ti 2 O 7 , demonstrated evolution of H 2 and O 2 in a stoichiometric ratio from pure water under UV-light irradiation. The photocatalytic activities of the Ln 2 Ti 2 O 7 were significantly enhanced by the addition of excess Ln (5%) in the preparation procedure. As for the Ln 2 Ti 2 O 7 containing small Ln 3+ (Ln = Dy-Lu), the enhanced photocatalytic activity can be explained by the suppression of impurity phase formation, rutile titanium oxide (Ti0 2 ), which formed in the stoichiometric preparation at high temperature. It was also found that the addition of excess Ln increased the surface area of these materials, which certainly contributed to the enhanced photocatalytic activity. In the case of Gd 2 Ti 2 O 7 , the photocatalytic activity was remarkably improved by the addition of excess Gd, in spite of the fact that no impurity phase formed even in the stoichiometric preparation. Scanning electron microscopy (SEM) and pore size distribution analysis revealed that the addition of excess amount of Gd made the Gd 2 Ti 2 O 7 material porous, which is undoubtedly one of the major factors enhancing the photocatalytic activity." @default.
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- W2043977367 date "2008-10-15" @default.
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- W2043977367 title "Photocatalytic Water Splitting into H<sub>2</sub>and O<sub>2</sub>over Titanate Pyrochlores Ln<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>(Ln = Lanthanoid: Eu–Lu)" @default.
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- W2043977367 doi "https://doi.org/10.1246/bcsj.81.1315" @default.
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