期刊
DALTON TRANSACTIONS
卷 42, 期 45, 页码 15937-15940出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt51495a
关键词
-
资金
- JSPS
- [2107]
- [24108708]
- [25288063]
- Grants-in-Aid for Scientific Research [25288063, 24108708] Funding Source: KAKEN
The mechanism of plasmon-induced charge separation of gold nanoparticles (Au NPs) on TiO2 was investigated with the help of anionic ligands. Au NPs are oxidized in the presence of KX (X = SCN, Br or Cl), chiefly via direct oxidation to [AuX4](-). The reactivity of Au NPs depends on the solution pH, the type of anion ligands and the excitation wavelength, suggesting that the photopotential of Au NPs during plasmon-induced charge separation depends on both the flatband potential of TiO2 and the energy of irradiated photons. The results indicate that the reactivity and efficiency of the plasmon-induced charge separation and accompanying reactions can be tuned and optimized by changing those factors.
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