TiO2 film supported by vertically aligned gold nanorod superlattice array for enhanced photocatalytic hydrogen evolution

Liangsheng Hu; Yong Li; Xiang Peng; Weiran Zheng; Wen Xu; Jinyang Zhu; Lawrence Yoon Suk Lee; Paul K. Chu; Kwok Yin Wong

doi:10.1016/j.cej.2020.127900

TiO₂ film supported by vertically aligned gold nanorod superlattice array for enhanced photocatalytic hydrogen evolution

Liangsheng Hu, Yong Li, Xiang Peng, Weiran Zheng, Wen Xu, Jinyang Zhu, Lawrence Yoon Suk Lee^*, Paul K. Chu, Kwok Yin Wong

^*Corresponding author for this work

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

26 Scopus citations

Abstract

Photocatalytic hydrogen generation from water as a renewable non-polluting technique for converting solar energy to chemical energy has recently attracted worldwide attention. However, low hydrogen production efficiency of traditional photocatalysis still remains as a challenge. Here, we report a large area TiO₂ film supported by vertically ordered Au nanorods superlattice array (O-AuNRs/TiO₂), which demonstrates excellent photocatalytic performances of hydrogen evolution from water under solar and visible light irradiation. The O-AuNRs/TiO₂ architecture enables the significant localized surface plasmon resonance (LSPR) enhancement, including both local electromagnetic field effect and hot electron transfer effect, which promotes the photocatalytic hydrogen evolution rate of the TiO₂ film by 58 times. The photocatalytic efficiency of O-AuNRs/TiO₂ exceeds that of the TiO₂ film supported by randomly oriented AuNRs by over five times. Finite difference time domain (FDTD) modeling results support that the strong coupling of O-AuNRs enhances the electromagnetic field intensity along the longitudinal axis in the gaps between adjacent AuNRs and the average electric field enhancement factors at the interface between the AuNRs and TiO₂ of O-AuNRs/TiO₂. This work demonstrates the substantial performance boost of conventional photocatalyst by LSPR enhancement, thus provides a promising tactic to devise highly efficient photocatalytic system for solar energy conversion.

Original language	English
Article number	127900
Journal	Chemical Engineering Journal
Volume	417
DOIs	https://doi.org/10.1016/j.cej.2020.127900
State	Published - 1 Aug 2021
Externally published	Yes

Keywords

Au nanorod superlattice
Hot electron
Near field enhancement
Photocatalytic hydrogen evolution
Surface plasmon resonance

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cej.2020.127900

Cite this

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title = "TiO2 film supported by vertically aligned gold nanorod superlattice array for enhanced photocatalytic hydrogen evolution",

abstract = "Photocatalytic hydrogen generation from water as a renewable non-polluting technique for converting solar energy to chemical energy has recently attracted worldwide attention. However, low hydrogen production efficiency of traditional photocatalysis still remains as a challenge. Here, we report a large area TiO2 film supported by vertically ordered Au nanorods superlattice array (O-AuNRs/TiO2), which demonstrates excellent photocatalytic performances of hydrogen evolution from water under solar and visible light irradiation. The O-AuNRs/TiO2 architecture enables the significant localized surface plasmon resonance (LSPR) enhancement, including both local electromagnetic field effect and hot electron transfer effect, which promotes the photocatalytic hydrogen evolution rate of the TiO2 film by 58 times. The photocatalytic efficiency of O-AuNRs/TiO2 exceeds that of the TiO2 film supported by randomly oriented AuNRs by over five times. Finite difference time domain (FDTD) modeling results support that the strong coupling of O-AuNRs enhances the electromagnetic field intensity along the longitudinal axis in the gaps between adjacent AuNRs and the average electric field enhancement factors at the interface between the AuNRs and TiO2 of O-AuNRs/TiO2. This work demonstrates the substantial performance boost of conventional photocatalyst by LSPR enhancement, thus provides a promising tactic to devise highly efficient photocatalytic system for solar energy conversion.",

keywords = "Au nanorod superlattice, Hot electron, Near field enhancement, Photocatalytic hydrogen evolution, Surface plasmon resonance",

author = "Liangsheng Hu and Yong Li and Xiang Peng and Weiran Zheng and Wen Xu and Jinyang Zhu and Lee, {Lawrence Yoon Suk} and Chu, {Paul K.} and Wong, {Kwok Yin}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

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doi = "10.1016/j.cej.2020.127900",

language = "英语",

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TY - JOUR

T1 - TiO2 film supported by vertically aligned gold nanorod superlattice array for enhanced photocatalytic hydrogen evolution

AU - Hu, Liangsheng

AU - Li, Yong

AU - Peng, Xiang

AU - Zheng, Weiran

AU - Xu, Wen

AU - Zhu, Jinyang

AU - Lee, Lawrence Yoon Suk

AU - Chu, Paul K.

AU - Wong, Kwok Yin

PY - 2021/8/1

Y1 - 2021/8/1

N2 - Photocatalytic hydrogen generation from water as a renewable non-polluting technique for converting solar energy to chemical energy has recently attracted worldwide attention. However, low hydrogen production efficiency of traditional photocatalysis still remains as a challenge. Here, we report a large area TiO2 film supported by vertically ordered Au nanorods superlattice array (O-AuNRs/TiO2), which demonstrates excellent photocatalytic performances of hydrogen evolution from water under solar and visible light irradiation. The O-AuNRs/TiO2 architecture enables the significant localized surface plasmon resonance (LSPR) enhancement, including both local electromagnetic field effect and hot electron transfer effect, which promotes the photocatalytic hydrogen evolution rate of the TiO2 film by 58 times. The photocatalytic efficiency of O-AuNRs/TiO2 exceeds that of the TiO2 film supported by randomly oriented AuNRs by over five times. Finite difference time domain (FDTD) modeling results support that the strong coupling of O-AuNRs enhances the electromagnetic field intensity along the longitudinal axis in the gaps between adjacent AuNRs and the average electric field enhancement factors at the interface between the AuNRs and TiO2 of O-AuNRs/TiO2. This work demonstrates the substantial performance boost of conventional photocatalyst by LSPR enhancement, thus provides a promising tactic to devise highly efficient photocatalytic system for solar energy conversion.

AB - Photocatalytic hydrogen generation from water as a renewable non-polluting technique for converting solar energy to chemical energy has recently attracted worldwide attention. However, low hydrogen production efficiency of traditional photocatalysis still remains as a challenge. Here, we report a large area TiO2 film supported by vertically ordered Au nanorods superlattice array (O-AuNRs/TiO2), which demonstrates excellent photocatalytic performances of hydrogen evolution from water under solar and visible light irradiation. The O-AuNRs/TiO2 architecture enables the significant localized surface plasmon resonance (LSPR) enhancement, including both local electromagnetic field effect and hot electron transfer effect, which promotes the photocatalytic hydrogen evolution rate of the TiO2 film by 58 times. The photocatalytic efficiency of O-AuNRs/TiO2 exceeds that of the TiO2 film supported by randomly oriented AuNRs by over five times. Finite difference time domain (FDTD) modeling results support that the strong coupling of O-AuNRs enhances the electromagnetic field intensity along the longitudinal axis in the gaps between adjacent AuNRs and the average electric field enhancement factors at the interface between the AuNRs and TiO2 of O-AuNRs/TiO2. This work demonstrates the substantial performance boost of conventional photocatalyst by LSPR enhancement, thus provides a promising tactic to devise highly efficient photocatalytic system for solar energy conversion.

KW - Au nanorod superlattice

KW - Hot electron

KW - Near field enhancement

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