Fabrication and enhanced photocatalytic properties of Pt@SiO2@TiO2 composites by surface plasma resonance from Pt nanoparticles

Pt@SiO 2 @TiO 2 composites with an average diameter of about 120 nm were synthesized by an aqueous method. Morphology, microstructure, and light absorption performance of as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2015-01, Vol.17 (2), p.1, Article 62
Main Authors: Zhang, Fangfang, Liu, Wei, Liu, Yousong, Wang, Junyi, Ji, Guangbin
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Fabrication
Inorganic Chemistry
Lasers
Materials Science
Nanoparticles
Nanotechnology
Optical Devices
Optics
Photonics
Physical Chemistry
Research Paper
Resonance
Titanium dioxide
X-ray diffraction
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Summary:Pt@SiO 2 @TiO 2 composites with an average diameter of about 120 nm were synthesized by an aqueous method. Morphology, microstructure, and light absorption performance of as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV–Vis diffuse reflectance spectroscopy. The results indicate that 5-nm-thick SiO 2 interlayer coated on the Pt nanoparticles were used to separate the Pt from the TiO 2 . The covering SiO 2 layer between Pt nanoparticles and TiO 2 layer present a wide spectral response. The enhanced photocatalytic efficiency under both the full spectrum and visible light can be attributed to the existence of Pt nanoparticles and interlayer SiO 2 . The coupling processes between TiO 2 and plasmon were presented and the mechanism was discussed. The localized surface plasmon resonance effect of Pt nanoparticles is the main reason for the enhanced photocatalytic activity of the composite Pt@SiO 2 @TiO 2 .
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-015-2882-z