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Manipulation of surface plasmon resonance for high photocatalytic activity of Ag-Bi2WO6 hetero-architecture.
- Source :
-
Optik - International Journal for Light & Electron Optics . Feb2019, Vol. 180, p285-294. 10p. - Publication Year :
- 2019
-
Abstract
- Abstract The plasmonic photocatalyst of Ag-Bi 2 WO 6 was employed to investigate the effect of surface plasmon resonance (SPR) on the visible-light photocatalytic activity. Generally, it is accepted that metal nanoparticles as electron traps on the surface of semiconductor photocatalyst can effectively inhibit the recombination of photo-generated electron-hole pairs, provide more active sites and thereby enhance the photocatalytic activity. Nevertheless, SPR effect confirmed in Ag-Bi 2 WO 6 plays an important role in the photoreaction enhancement in the meantime. In this case, a facile and more efficient method was introduced to synthesize Ag-Bi 2 WO 6 hetero-architecture on basis of an ascorbic-acid-assisted route. The results and analysis show that a optimize photocatalytic efficiency can be achieved by elaborately manipulating SPR effect. For instance, the highest photocatalytic efficiency of 96.46% after 150 min visible-light irradiation was obtained as the molar ratio of Bi 2 WO 6 :Ag is 10:2, which suggest that it would be a promising candidate for photo-catalysis application. Eventually, a possible mechanism for the formation of Ag-Bi 2 WO 6 hetero-architecture and its enhanced photocatalytic activity was proposed and discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SURFACE plasmon resonance
*METAL nanoparticles
Subjects
Details
- Language :
- English
- ISSN :
- 00304026
- Volume :
- 180
- Database :
- Academic Search Index
- Journal :
- Optik - International Journal for Light & Electron Optics
- Publication Type :
- Academic Journal
- Accession number :
- 135228573
- Full Text :
- https://doi.org/10.1016/j.ijleo.2018.11.094