Abstract
Uniformly sized CdS nanoparticles exhibiting quantum size effect have been synthesized as a suspension in hexane solution containing oleic acid and 9-octadecenylamine as protective ligands. Our study focuses on utilizing the intrinsic optical property of the nanoparticles for photocatalytic H 2 evolution and photoelectrochemical reaction by immobilizing oxide substrate and removing protective ligands. Immobilized CdS nanoparticles on Ti0 2 were found to maintain their original particle size and optical property after impregnation and removal of the protective ligands by oxidative heat treatment and/or alkali treatment. The photocatalytic H 2 evolution rates in Na 2S-Na 2SO 3 solution under visible light were strongly affected by the CdS particle size (quantum size effect), CdS loading amount, and TiO 2 surface area. High photoanodic current was observed for CdS/Ti0 2 sprayed on a fluoride-doped tin oxide (FTO) electrode, functioning as an n-type semiconductor. The knowledge acquired in this study can be extended for further development in the field of nanoparticle materials covered with protective ligands.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 528-535 |
| Number of pages | 8 |
| Journal | Bulletin of the Chemical Society of Japan |
| Volume | 82 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2009 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry