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
N1 - Funding Information:
This work is financially supported by the Innovation and Technology Commission of Hong Kong to the State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, and National Natural Science Foundation of China ( 21806099 ). KYW acknowledges the support from the Patrick S.C. Poon Endowed Professorship.
Publisher Copyright:
© 2020 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
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
KW - Photocatalytic hydrogen evolution
KW - Surface plasmon resonance
UR - http://www.scopus.com/inward/record.url?scp=85097222707&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2020.127900
DO - 10.1016/j.cej.2020.127900
M3 - Journal article
AN - SCOPUS:85097222707
SN - 1385-8947
VL - 417
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 127900
ER -