Journal
RSC ADVANCES
Volume 5, Issue 21, Pages 15880-15885Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra16245e
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21173261]
- One Hundred Talents program of Chinese Academy of Sciences [1029471301]
- Cross Cooperation Program for Creative Research Teams of Chinese Academy of Sciences [Y251821601]
Ask authors/readers for more resources
TiO2 is among the most important semiconductor photocatalysts for solar light-driven H-2 production from photocatalytic water reduction. Commercialized mixed-phase Degussa P25 nanoparticles have been demonstrated as the most popular TiO2. However, its superiority cannot be exerted in the visible-light region. In this work, molecular aggregates of perylene tetracarboxylic diimide ( PTCDI, a kind of air-stable n-type organic semiconductor bearing an electron-rich phenylamino moiety and a dodecyl side-chain) were employed as a sensitizer to combine with Pt/TiO2 nanoparticles via solution processing. The PTCDI/Pt/TiO2 composites thus fabricated exhibit a broad visible-light response and excellent photochemical stability. The initial intramolecular charge transfer of PTCDI and its energy level being well matched to TiO2, ensure effective charge transfer among the PTCDI/Pt/TiO2 composite. When 25 mg of the composite powders are suspended in aqueous solution (100 mL) containing 10 mL of triethanolamine as a sacrificial electron donor, stable H-2 evolution with an activity of similar to 0.075 mu mol h(-1) is achieved under visible-light (lambda >= 420 nm) irradiation. Both intramolecular electron transfer from the electron rich 4-dimethylaminobenzyl group to the perylene core of PTCDI and the intermolecular charge transfer from PTCDI to TiO2 are key to the effective visible-light photoactivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available