|Author||Yang, Bingyang ♦ He, Dawei ♦ Wang, Wenshuo ♦ Zhuo, Zuliang ♦ Wang, Yongsheng|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Materials Research Bulletin|
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