Study on the Effect of Pt Intercalation into Layered Niobate Perovskite for Photocatalytic Behavior

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• 作者：Nan Xu ; Takahiro Takei ; Akira Miura ; Nobuhiro Kumada ; Ken-ichi Katsumata ; Nobuhiro Matsushita ; Kiyoshi Okada
• 刊名：Langmuir
• 出版年：2015
• 出版时间：July 14, 2015
• 年：2015
• 卷：31
• 期：27
• 页码：7660-7665
• 全文大小：400K
• ISSN：1520-5827

文摘

A novel photocatalyst consisting of an intercalated perovskite H_1鈥?xPt_xLaNb₂O₇ was fabricated by ion exchange. Synchrotron X-ray diffraction and X-ray photoelectron spectroscopy results confirmed that Pt²⁺ exists within the interlayer space of the layered perovskite. H_1鈥?xPt_xLaNb₂O₇ composed of layered niobate perovskite and intercalated Pt²⁺ completely degraded a 20 ppm phenol solution in 3 h under irradiation by Xe light, which exhibits photocatalytic activity superior to those of RbLaNb₂O₇, Pt-deposited RbLaNb₂O₇, and HLaNb₂O₇. From first-principles density functional theory simulation, high photocatalytic activity of H_1鈥?xPt_xLaNb₂O₇ is attributed to the emergence of a new O 2p鈥揚t 5d hybridized band on top of the valence band.