A plasmonic photocatalyst consisting of silver nanoparticles embedded in titanium dioxide

Journal of the American Chemical Society
Koichi AwazuToshiya Watanabe

Abstract

Titanium dioxide (TiO2) displays photocatalytic behavior under near-ultraviolet (UV) illumination. In another scientific field, it is well understood that the excitation of localized plasmon polaritons on the surface of silver (Ag) nanoparticles (NPs) causes a tremendous increase of the near-field amplitude at well-defined wavelengths in the near UV. The exact resonance wavelength depends on the shape and the dielectric environment of the NPs. We expected that the photocatalytic behavior of TiO2 would be greatly boosted if it gets assisted by the enhanced near-field amplitudes of localized surface plasmon (LSP). Here we show that this is true indeed. We named this new phenomenon "plasmonic photocatalysis". The key to enable plasmonic photocatalysis is to deposit TiO2 on a NP comprising an Ag core covered with a silica (SiO2) shell to prevent oxidation of Ag by direct contact with TiO2. The most appropriate diameter for Ag NPs and thickness for the SiO2 shell giving rise to LSP in the near UV were estimated from Mie scattering theory. Upon implementing a device that took these design considerations into account, the measured photocatalytic activity under near UV illumination of such a plasmonic photocatalyst, monitored by decomp...Continue Reading

References

Jul 31, 1997·Nature·G MelinoA Finazzi-Agro
Mar 18, 2005·Journal of the American Chemical Society·Tsutomu Hirakawa, Prashant V Kamat
Feb 8, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Tsutomu Hirakawa, Prashant V Kamat

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Citations

Jan 7, 2014·Journal of Colloid and Interface Science·Shaofeng ZhangChangzhong Jiang
Dec 30, 2010·ACS Applied Materials & Interfaces·Hui XuLi Xu
Mar 30, 2011·ACS Applied Materials & Interfaces·Xijin XuDmitri Golberg
Oct 20, 2011·ACS Applied Materials & Interfaces·Bin LiuEray S Aydil
Nov 20, 2013·ACS Applied Materials & Interfaces·Zhang Chen, Yi-Jun Xu
Nov 24, 2011·Chemical Reviews·Anna KubackaGerardo Colón
Jul 1, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Xiao-Wang Liu
Jul 14, 2011·Nano Letters·Isabell ThomannMark L Brongersma
Nov 24, 2011·Nature Materials·Suljo LinicDavid B Ingram
Apr 21, 2009·Chemical Communications : Chem Comm·Ivano Alessandri, Laura E Depero
May 3, 2012·Nanoscale Research Letters·Jinxia XuChangzhong Jiang
Jan 29, 2014·Journal of Hazardous Materials·Agileo Hernández-GordilloV Rodríguez-González
Sep 17, 2014·Proceedings of the National Academy of Sciences of the United States of America·Jana OlsonStephan Link
Jan 29, 2016·The Journal of Physical Chemistry Letters·Scott K Cushing, Nianqiang Nick Wu
Aug 5, 2011·Colloids and Surfaces. B, Biointerfaces·Roya Dastjerdi, Majid Montazer
Oct 12, 2010·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·A PourahmadE Kashefian
Aug 3, 2010·Colloids and Surfaces. B, Biointerfaces·Roya DastjerdiShadi Shahsavan

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