Photocatalytic H2 evolution by layered perovskite Ca3Ti2O7 codoped with Rh and Ln (Ln = La, Pr, Nd, Eu, Gd, Yb, and Y) under visible light irradiation
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概要
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Layered perovskite Ca3Ti2O7 codoped with Rh and Ln (Ca3-xLnxTi1.9Rh0.1O7; Ln = La, Pr, Nd, Eu, Gd, Yb, and Y; 0 ≤ x ≤ 0.15) was synthesized by a conventional solid-state reaction to investigate the effects of Rh and Ln codoping on the photocatalytic activity. Rh and Ln-codoped Ca3Ti2O7 exhibited a higher photocatalytic activity than Rh-doped Ca3Ti2O7 for H2 production from an aqueous methanol solution under visible light irradiation (λ > 420 nm). In addition, the induction period for H2 production was shortened by codoping with Rh and Ln. The codoped elements helped control the oxidation state of Rh ions and suppressed the formation of oxygen defects, improving the activity of the Rh-doped Ca3Ti2O7 photocatalyst.
著者
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Matsuda Motohide
Department Of Electrical Engineering Nagaoka University Of Technology
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Matsuda Motohide
Dep. Of Material And Energy Sci. Graduate School Of Environmental Sci. Okayama Univ.
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Miyake Michihiro
Department Of Chemistry Gunma University
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NISHIMOTO Shunsuke
Department of Material and Energy Science, Graduate School of Environmental Science, Okayama Univers
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OKAZAKI Yoshihiro
Department of Material and Energy Science, Graduate School of Environmental Science, Okayama Univers
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NISHIMOTO Shunsuke
Department of Material and Energy Science, Graduate School of Environmental Science, Okayama University
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NISHIMOTO Shunsuke
Department of Environmental Chemistry and Materials, Okayama University
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OKAZAKI Yoshihiro
Department of Material and Energy Science, Graduate School of Environmental Science, Okayama University
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Matsuda Motohide
Department of Material and Energy Science, Graduate School of Environmental Science, Okayama University
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