High-density single crystalline Ti O2 nanowires (∼50 nm diameter) were grown on Ti substrates by chemical vapor deposition, and they were overcoated with the solution containing CdSe nanocrystals (∼5 nm diameter) and heat treated at 600 °C to form Ti O2 hetersotructured nanowire arrays. The Ti O2 nanowire arrays showed uniformly distributed CdSe nanocrystals and high crystallinity of rutile and wurtzite from the Ti O2 and the CdSe, respectively. Owing to the heterostructure of Ti O2, they demonstrate almost full visible-range light absorption, and thus enhanced photocatalytic activity by the charge separation via electron and hole transfers between the CdSe and the Ti O2.
Bibliographical noteFunding Information:
This work was supported by the Korea Research Foundation (KRF) grant by the Korean Government (MOEHRD) (KRF-2006-311-D00568).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)