NDLI: Control of Surface Plasmon Resonance of $Au/SnO_{2}$ by Modification with Ag and Cu for Photoinduced Reactions under Visible-Light Irradiation over a Wide Range

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How Does Substitutional Doping Affect Visible Light Absorption in a Series of Homodisperse $Ti_{11}$ Polyoxotitanate Nanoparticles—A Comment on the Band Gap Determination of the $Fe^{II}$ Cages (Chem. Eur. J. 2015, 21, 11538)

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Control of Surface Plasmon Resonance of $Au/SnO_{2}$ by Modification with Ag and Cu for Photoinduced Reactions under Visible-Light Irradiation over a Wide Range

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Tanaka, Atsuhiro Hashimoto, Keiji Kominami, Hiroshi
Description	Author Affiliation: Tanaka A ( Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Kowakae, Higashiosaka, Osaka, 577-8502, Japan.); Hashimoto K ( Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577, Japan.); Kominami H ( Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Kowakae, Higashiosaka, Osaka, 577-8502, Japan.)
Abstract	Gold particles supported on tin(IV) oxide (0.2 wt % $Au/SnO_{2})$ were modified with copper and silver by the multistep photodeposition method. Absorption around λ=550 nm, attributed to surface plasmon resonance (SPR) of Au, gradually shifted to longer wavelengths on modification with Cu and finally reached λ=620 nm at 0.8 wt % Cu. On the other hand, the absorption shifted to shorter wavelength with increasing amount of Ag and reached λ=450 nm at 0.8 wt % Ag. These Cu- and Ag-modified 0.2 wt % $Au/SnO_{2}$ materials $(Cu-Au/SnO_{2}$ and $Ag-Au/SnO_{2})$ and 1.0 wt % $Au/SnO_{2}$ were used for mineralization of formic acid to carbon dioxide in aqueous suspension under irradiation with visible light from a xenon lamp and three kinds of light-emitting diodes with different wavelengths. The reaction rates for the mineralization of formic acid over these materials depend on the wavelength of light. Apparent quantum efficiencies of $Cu-Au/SnO_{2},$ $Au/SnO_{2},$ and $Ag-Au/SnO_{2}$ reached 5.5 % at 625 nm, 5.8 % at 525 nm, and 5.1 % at 450 nm, respectively. These photocatalysts can also be used for selective oxidation of alcohols to corresponding carbonyl compounds in aqueous solution under visible-light irradiation. Broad responses to visible light in formic acid mineralization and selective alcohol oxidation were achieved when the three materials were used simultaneously.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	13
Volume Number	22
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2016-03-18
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Copper Chemistry Metal Nanoparticles Tin Compounds Catalysis Oxidation-Reduction Photochemical Processes Surface Plasmon Resonance Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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