Plasmonic gold nanocrystals coupled with photonic crystal seamlessly on TiO2 nanotube photoelectrodes for efficient visible light photoelectrochemical water splitting

Handle URI:
http://hdl.handle.net/10754/562612
Title:
Plasmonic gold nanocrystals coupled with photonic crystal seamlessly on TiO2 nanotube photoelectrodes for efficient visible light photoelectrochemical water splitting
Authors:
Zhang, Zhonghai; Zhang, Lianbin; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Zhang, Hongnan; Wang, Peng
Abstract:
A visible light responsive plasmonic photocatalytic composite material is designed by rationally selecting Au nanocrystals and assembling them with the TiO2-based photonic crystal substrate. The selection of the Au nanocrystals is so that their surface plasmonic resonance (SPR) wavelength matches the photonic band gap of the photonic crystal and thus that the SPR of the Au receives remarkable assistance from the photonic crystal substrate. The design of the composite material is expected to significantly increase the Au SPR intensity and consequently boost the hot electron injection from the Au nanocrystals into the conduction band of TiO2, leading to a considerably enhanced water splitting performance of the material under visible light. A proof-of-concept example is provided by assembling 20 nm Au nanocrystals, with a SPR peak at 556 nm, onto the photonic crystal which is seamlessly connected on TiO2 nanotube array. Under visible light illumination (>420 nm), the designed material produced a photocurrent density of ∼150 μA cm-2, which is the highest value ever reported in any plasmonic Au/TiO2 system under visible light irradiation due to the photonic crystal-assisted SPR. This work contributes to the rational design of the visible light responsive plasmonic photocatalytic composite material based on wide band gap metal oxides for photoelectrochemical applications. © 2012 American Chemical Society.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Advanced Nanofabrication, Imaging and Characterization Core Lab; Core Labs
Publisher:
American Chemical Society
Journal:
Nano Letters
Issue Date:
9-Jan-2013
DOI:
10.1021/nl3029202
PubMed ID:
23205530
Type:
Article
ISSN:
15306984
Sponsors:
The authors are grateful for KAUST for providing financial support.
Appears in Collections:
Articles; Environmental Science and Engineering Program; Advanced Nanofabrication, Imaging and Characterization Core Lab; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Zhonghaien
dc.contributor.authorZhang, Lianbinen
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorZhang, Hongnanen
dc.contributor.authorWang, Pengen
dc.date.accessioned2015-08-03T10:58:21Zen
dc.date.available2015-08-03T10:58:21Zen
dc.date.issued2013-01-09en
dc.identifier.issn15306984en
dc.identifier.pmid23205530en
dc.identifier.doi10.1021/nl3029202en
dc.identifier.urihttp://hdl.handle.net/10754/562612en
dc.description.abstractA visible light responsive plasmonic photocatalytic composite material is designed by rationally selecting Au nanocrystals and assembling them with the TiO2-based photonic crystal substrate. The selection of the Au nanocrystals is so that their surface plasmonic resonance (SPR) wavelength matches the photonic band gap of the photonic crystal and thus that the SPR of the Au receives remarkable assistance from the photonic crystal substrate. The design of the composite material is expected to significantly increase the Au SPR intensity and consequently boost the hot electron injection from the Au nanocrystals into the conduction band of TiO2, leading to a considerably enhanced water splitting performance of the material under visible light. A proof-of-concept example is provided by assembling 20 nm Au nanocrystals, with a SPR peak at 556 nm, onto the photonic crystal which is seamlessly connected on TiO2 nanotube array. Under visible light illumination (>420 nm), the designed material produced a photocurrent density of ∼150 μA cm-2, which is the highest value ever reported in any plasmonic Au/TiO2 system under visible light irradiation due to the photonic crystal-assisted SPR. This work contributes to the rational design of the visible light responsive plasmonic photocatalytic composite material based on wide band gap metal oxides for photoelectrochemical applications. © 2012 American Chemical Society.en
dc.description.sponsorshipThe authors are grateful for KAUST for providing financial support.en
dc.publisherAmerican Chemical Societyen
dc.subjectAu nanocrystalsen
dc.subjectphotonic crystalen
dc.subjectPlasmonicen
dc.subjectTiO2 nanotubeen
dc.subjectwater splittingen
dc.titlePlasmonic gold nanocrystals coupled with photonic crystal seamlessly on TiO2 nanotube photoelectrodes for efficient visible light photoelectrochemical water splittingen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentCore Labsen
dc.identifier.journalNano Lettersen
kaust.authorHedhili, Mohamed N.en

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