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Author Yang, Bingyang ♦ He, Dawei ♦ Wang, Wenshuo ♦ Zhuo, Zuliang ♦ Wang, Yongsheng
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ NANOSCIENCE AND NANOTECHNOLOGY ♦ AQUEOUS SOLUTIONS ♦ COMPUTERIZED SIMULATION ♦ ELECTROMAGNETIC FIELDS ♦ ELECTRONS ♦ GOLD ♦ HOLES ♦ INTERFACES ♦ IRRADIATION ♦ METHYLENE BLUE ♦ NANOCOMPOSITES ♦ NANOPARTICLES ♦ NANOTUBES ♦ PHOTOCATALYSIS ♦ PLASMONS ♦ PRECIPITATION ♦ SEMICONDUCTOR MATERIALS ♦ SURFACES ♦ TITANIUM OXIDES ♦ VISIBLE RADIATION ♦ X-RAY DIFFRACTION
Abstract Highlights: • APTMS/(TNTs-Au) was synthesized using a deposition-precipitation process. • APTMS/(TNTs-Au) showed superior visible light activity for the degradation of methylene blue. • The electromagnetic field distribution at the interface between TNTs and Au NPs were estimated by the 3D finite-difference time domain simulation. • The working mechanism of the photocatalytic activity of APTMS/(TNTs-Au) was illustrated. - Abstract: [3-Aminopropyl]trimethoxysilane-modified titania nanotubes decorated with Au nanoparticles (APTMS/(TNTs-Au)) nanocomposites were synthesized using a deposition-precipitation process. The results showed that Au nanoparticles (NPs) in the metallic state were firmly adhered to the surface of the anatase TNTs. APTMS/(TNTs-Au) exhibited great photocatalytic activities which were evaluated from the degradation rate of methylene blue aqueous solution under visible light irradiation. 3D finite-difference time domain simulation was performed to estimate the electromagnetic field distribution at the interface between TNTs and Au NPs. The visible photocatalytic activity of APTMS/(TNTs-Au) was largely attributed to the surface plasmon absorption of metallic Au NPs, which generated and transferred hot electrons to the CB of TNTs. In addition, the hot electrons on the surface of TNTs also suppressed the radiative electron–hole recombination and consequently enhanced the photocatalytic activity.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-02-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 74


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