Deposition of plasmonic silver nanoparticles onto semiconducting oxide nanosheets and their photochromic behavior

Colloidally dispersed niobate nanosheets prepared by exfoliation of layered hexaniobate was modified by Ag nanoparticles by photodeposition, and the Ag-loaded colloidal niobate nanosheets showed photochromic response upon alternating irradiation of UV and visible light. Ag nanoparticles were success...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2015, Vol.123 (1441), p.809-812
Main Authors: NAKATO, Teruyuki, ISHIDA, Sho, KANEDA, Jun-ya, MOURI, Emiko
Format: Article
Language:English
Subjects:
Colloids
Deposition
Irradiation
Nanoparticles
Nanostructure
Niobates
Silver
Titanium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Colloidally dispersed niobate nanosheets prepared by exfoliation of layered hexaniobate was modified by Ag nanoparticles by photodeposition, and the Ag-loaded colloidal niobate nanosheets showed photochromic response upon alternating irradiation of UV and visible light. Ag nanoparticles were successfully deposited onto the photocatalytically active niobate nanosheets in colloidal state through UV irradiation in the presence of Ag+ ions and ethanol. The deposited Ag nanoparticles exhibit a characteristic absorption band of the localized surface plasmon resonance (LSPR), which was also supported by TEM observations. Visible-light irradiation of the Ag-deposited niobate nanosheets caused reduction of the LSPR band intensity, which was recovered by subsequent UV irradiation. Band position also varied corresponding to the alternate visible and UV light irradiations. The reversible spectroscopic change was ascribed to the oxidative dissolution of the Ag nanoparticles located on the niobate nanosheets with visible-light irradiation and re-deposion of metallic Ag with the UV irradiation, as previously reported for the photochromic system of the composite of Ag nanoparticles and TiO2.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.123.809