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Title: Photocatalytic properties of Au-deposited mesoporous SiO{sub 2}–TiO{sub 2} photocatalyst under simultaneous irradiation of UV and visible light

Abstract

Mesoporous SiO{sub 2} templates deposited TiO{sub 2} nanocrystals are synthesized via a sol–gel route, and Au nanoparticles (NPs) are deposited in the tubular mesopores of the templates by a photodeposition method (Au/SiO{sub 2}–TiO{sub 2}). The photocatalytic characteristics of Au/SiO{sub 2}–TiO{sub 2} are discussed with the action spectra of photoreactions of 2-propanol and methylene blue. Photocatalytic activities of SiO{sub 2}–TiO{sub 2} under individual ultraviolet (UV) and visible (Vis) light illumination are enhanced by deposition of Au NPs. Furthermore, Au/SiO{sub 2}–TiO{sub 2} shows higher photocatalytic activities under simultaneous irradiation of UV and Vis light compared to the activity under individual UV and Vis light irradiation. Since the photocatalytic activity under simultaneous irradiation is almost the same as the total activities under individual UV and Vis light irradiation, it is concluded that the electrons and the holes generated by lights of different wavelengths are efficiently used for photocatalysis without carrier recombination. - Graphical abstract: This graphic shows the possible charge behavior in Au/SiO{sub 2}–TiO{sub 2} under independent light irradiation of ultraviolet and visible light irradiation. Both reactions under independent UV and Vis light irradiation occurred in parallel when Au/SiO{sub 2}–TiO{sub 2} photocatalyst was illuminated UV and Vis light simultaneously, and then photocatalytic activitymore » is improved by simultaneous irradiation. - Highlights: • Au nanoparticles were deposited in mesoporous SiO{sub 2}–TiO{sub 2} by a photodeposition method. • Photocatalytic activity under UV and Vis light was enhanced by deposition of Au. • Photocatalytic activity of Au/SiO{sub 2}–TiO{sub 2} was improved by simultaneous irradiation.« less

Authors:
; ; ;
Publication Date:
OSTI Identifier:
22577794
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 235; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMPARATIVE EVALUATIONS; DEPOSITION; DEPOSITS; ELECTRONS; GOLD COMPOUNDS; IRRADIATION; NANOPARTICLES; NANOSTRUCTURES; PHOTOCATALYSIS; PLASMONS; PROPANOLS; RESONANCE; SILICA; SILICON OXIDES; SOL-GEL PROCESS; SOLS; SPECTRA; SURFACES; TITANIUM OXIDES; WAVELENGTHS

Citation Formats

Okuno, T., E-mail: t093507@edu.imc.tut.ac.jp, Kawamura, G., E-mail: gokawamura@ee.tut.ac.jp, Muto, H., E-mail: muto@ee.tut.ac.jp, and Matsuda, A., E-mail: matsuda@ee.tut.ac.jp. Photocatalytic properties of Au-deposited mesoporous SiO{sub 2}–TiO{sub 2} photocatalyst under simultaneous irradiation of UV and visible light. United States: N. p., 2016. Web. doi:10.1016/J.JSSC.2015.12.025.
Okuno, T., E-mail: t093507@edu.imc.tut.ac.jp, Kawamura, G., E-mail: gokawamura@ee.tut.ac.jp, Muto, H., E-mail: muto@ee.tut.ac.jp, & Matsuda, A., E-mail: matsuda@ee.tut.ac.jp. Photocatalytic properties of Au-deposited mesoporous SiO{sub 2}–TiO{sub 2} photocatalyst under simultaneous irradiation of UV and visible light. United States. https://doi.org/10.1016/J.JSSC.2015.12.025
Okuno, T., E-mail: t093507@edu.imc.tut.ac.jp, Kawamura, G., E-mail: gokawamura@ee.tut.ac.jp, Muto, H., E-mail: muto@ee.tut.ac.jp, and Matsuda, A., E-mail: matsuda@ee.tut.ac.jp. Tue . "Photocatalytic properties of Au-deposited mesoporous SiO{sub 2}–TiO{sub 2} photocatalyst under simultaneous irradiation of UV and visible light". United States. https://doi.org/10.1016/J.JSSC.2015.12.025.
@article{osti_22577794,
title = {Photocatalytic properties of Au-deposited mesoporous SiO{sub 2}–TiO{sub 2} photocatalyst under simultaneous irradiation of UV and visible light},
author = {Okuno, T., E-mail: t093507@edu.imc.tut.ac.jp and Kawamura, G., E-mail: gokawamura@ee.tut.ac.jp and Muto, H., E-mail: muto@ee.tut.ac.jp and Matsuda, A., E-mail: matsuda@ee.tut.ac.jp},
abstractNote = {Mesoporous SiO{sub 2} templates deposited TiO{sub 2} nanocrystals are synthesized via a sol–gel route, and Au nanoparticles (NPs) are deposited in the tubular mesopores of the templates by a photodeposition method (Au/SiO{sub 2}–TiO{sub 2}). The photocatalytic characteristics of Au/SiO{sub 2}–TiO{sub 2} are discussed with the action spectra of photoreactions of 2-propanol and methylene blue. Photocatalytic activities of SiO{sub 2}–TiO{sub 2} under individual ultraviolet (UV) and visible (Vis) light illumination are enhanced by deposition of Au NPs. Furthermore, Au/SiO{sub 2}–TiO{sub 2} shows higher photocatalytic activities under simultaneous irradiation of UV and Vis light compared to the activity under individual UV and Vis light irradiation. Since the photocatalytic activity under simultaneous irradiation is almost the same as the total activities under individual UV and Vis light irradiation, it is concluded that the electrons and the holes generated by lights of different wavelengths are efficiently used for photocatalysis without carrier recombination. - Graphical abstract: This graphic shows the possible charge behavior in Au/SiO{sub 2}–TiO{sub 2} under independent light irradiation of ultraviolet and visible light irradiation. Both reactions under independent UV and Vis light irradiation occurred in parallel when Au/SiO{sub 2}–TiO{sub 2} photocatalyst was illuminated UV and Vis light simultaneously, and then photocatalytic activity is improved by simultaneous irradiation. - Highlights: • Au nanoparticles were deposited in mesoporous SiO{sub 2}–TiO{sub 2} by a photodeposition method. • Photocatalytic activity under UV and Vis light was enhanced by deposition of Au. • Photocatalytic activity of Au/SiO{sub 2}–TiO{sub 2} was improved by simultaneous irradiation.},
doi = {10.1016/J.JSSC.2015.12.025},
url = {https://www.osti.gov/biblio/22577794}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 235,
place = {United States},
year = {2016},
month = {3}
}