期刊
NANO ENERGY
卷 35, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.03.014
关键词
TiO2 mesocrystal; Au NRs; H-2 production; Visible-NIR photocatalysis; Hot electron; Charge transfer
类别
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government [25220806]
- Egyptian Cultural Affairs and Missions Sector
TiO2 mesocrystals (TMC) have efficient charge transport properties and long-lived charges which cause high photoconductivity and photocatalytic activity. However, TMC have no absorption in the region of visible and near-Infrared (NIR) light. The optical resonance of Au nanorods (NRs) depending mainly on their length and width (aspect ratio) can be used to design panchromatic absorbers, covering most of the useful solar spectrum. Therefore, in this article, Au NRs and TMC composites were prepared by the ligand exchange method to show highly efficient H-2 production (924 mu mol h(-1) g(-1)) under visible-NIR light irradiation. The efficient H2 production is explained by surface plasmon resonance (SPR) of Au NRs, electron injection to TMC, efficient charge transport in TMC due to the superstructure of TMC and water reduction on TMC. Single-particle confocal fluorescence microscopy and time-resolved diffuse reflectance measurements confirmed the efficient hot electron injection and charge separation from Au NRs with strong SPR to the superstructure of TMC.
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