Direct evidence of plasmon enhancement on photocatalytic hydrogen generation over Au/Pt-decorated TiO2 nanofibers

Zhenyi Zhang; Anran Li; Shao Wen Cao; Michel Bosman; Shuzhou Li; Can Xue

doi:10.1039/c3nr06562f

Direct evidence of plasmon enhancement on photocatalytic hydrogen generation over Au/Pt-decorated TiO₂ nanofibers

Zhenyi Zhang, Anran Li, Shao Wen Cao, Michel Bosman, Shuzhou Li, Can Xue^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

143 Citations (Scopus)

Abstract

Direct evidence of plasmon-enhanced H₂ generation is observed in photocatalytic water reduction by using TiO₂ electrospun nanofibers co-decorated with Au and Pt nanoparticles through dual-beam irradiation. The Au/Pt/TiO₂ nanofibers exhibit certain activity for H₂ generation under single irradiation at 420 nm that excites the defect/impurity states of TiO₂. Significantly, when secondary irradiation at 550 nm is introduced to simultaneously excite Au SPR, we observed 2.5 times higher activity for H₂ generation. Further investigation by finely controlling the irradiation wavelengths reveals that the enhancement factor on the photocatalytic activity for H₂ generation is directly correlated with the plasmon absorption band of the Au nanoparticles in the Au/Pt/TiO ₂ nanofibers. The control experiments with different sacrificial agents suggest that the hot plasmonic electrons of Au are responsible for the enhanced photocatalytic activity that can be magnified when TiO₂ is simultaneously excited. This journal is

Original language	English
Pages (from-to)	5217-5222
Number of pages	6
Journal	Nanoscale
Volume	6
Issue number	10
DOIs	https://doi.org/10.1039/c3nr06562f
Publication status	Published - May 21 2014
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science

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title = "Direct evidence of plasmon enhancement on photocatalytic hydrogen generation over Au/Pt-decorated TiO2 nanofibers",

abstract = "Direct evidence of plasmon-enhanced H2 generation is observed in photocatalytic water reduction by using TiO2 electrospun nanofibers co-decorated with Au and Pt nanoparticles through dual-beam irradiation. The Au/Pt/TiO2 nanofibers exhibit certain activity for H2 generation under single irradiation at 420 nm that excites the defect/impurity states of TiO2. Significantly, when secondary irradiation at 550 nm is introduced to simultaneously excite Au SPR, we observed 2.5 times higher activity for H2 generation. Further investigation by finely controlling the irradiation wavelengths reveals that the enhancement factor on the photocatalytic activity for H2 generation is directly correlated with the plasmon absorption band of the Au nanoparticles in the Au/Pt/TiO 2 nanofibers. The control experiments with different sacrificial agents suggest that the hot plasmonic electrons of Au are responsible for the enhanced photocatalytic activity that can be magnified when TiO2 is simultaneously excited. This journal is",

author = "Zhenyi Zhang and Anran Li and Cao, \{Shao Wen\} and Michel Bosman and Shuzhou Li and Can Xue",

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T1 - Direct evidence of plasmon enhancement on photocatalytic hydrogen generation over Au/Pt-decorated TiO2 nanofibers

AU - Zhang, Zhenyi

AU - Li, Anran

AU - Cao, Shao Wen

AU - Bosman, Michel

AU - Li, Shuzhou

AU - Xue, Can

PY - 2014/5/21

Y1 - 2014/5/21

N2 - Direct evidence of plasmon-enhanced H2 generation is observed in photocatalytic water reduction by using TiO2 electrospun nanofibers co-decorated with Au and Pt nanoparticles through dual-beam irradiation. The Au/Pt/TiO2 nanofibers exhibit certain activity for H2 generation under single irradiation at 420 nm that excites the defect/impurity states of TiO2. Significantly, when secondary irradiation at 550 nm is introduced to simultaneously excite Au SPR, we observed 2.5 times higher activity for H2 generation. Further investigation by finely controlling the irradiation wavelengths reveals that the enhancement factor on the photocatalytic activity for H2 generation is directly correlated with the plasmon absorption band of the Au nanoparticles in the Au/Pt/TiO 2 nanofibers. The control experiments with different sacrificial agents suggest that the hot plasmonic electrons of Au are responsible for the enhanced photocatalytic activity that can be magnified when TiO2 is simultaneously excited. This journal is

AB - Direct evidence of plasmon-enhanced H2 generation is observed in photocatalytic water reduction by using TiO2 electrospun nanofibers co-decorated with Au and Pt nanoparticles through dual-beam irradiation. The Au/Pt/TiO2 nanofibers exhibit certain activity for H2 generation under single irradiation at 420 nm that excites the defect/impurity states of TiO2. Significantly, when secondary irradiation at 550 nm is introduced to simultaneously excite Au SPR, we observed 2.5 times higher activity for H2 generation. Further investigation by finely controlling the irradiation wavelengths reveals that the enhancement factor on the photocatalytic activity for H2 generation is directly correlated with the plasmon absorption band of the Au nanoparticles in the Au/Pt/TiO 2 nanofibers. The control experiments with different sacrificial agents suggest that the hot plasmonic electrons of Au are responsible for the enhanced photocatalytic activity that can be magnified when TiO2 is simultaneously excited. This journal is

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Direct evidence of plasmon enhancement on photocatalytic hydrogen generation over Au/Pt-decorated TiO₂ nanofibers

Abstract

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