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Proceedings Paper

Photocatalytic hydrogen production over CdS/titania-nanotube composite films
Author(s): Sang-Jin Moon; Hyun-Mi Lee; Won-Wook So; Jin-Ook Baeg; Kijeong Kong
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Paper Abstract

Titania nanotubes (TiNTs) with high surface area were synthesized by hydrothermal reaction under strongly basic condition and their photocatalytic application was explored. After preparing a series of CdS-TiNT composite films with variation of the mole ratio (r) of TiNT/(CdS + TiNT), their photocatalytic activities for hydrogen production and the photocurrent generation under the visible light irradiation were examined. In the aspect of light absorption for the photocatalytic reaction, the CdS-TiNT composite films revealed similar amounts of absorption to their counterparts, i.e., CdS-TiO2 particulate series. However, the former showed less significant synergistic effect in the photocurrent generation and lower photocatalytic activities compared to the latter. Consequently, it appears that TiNTs are not so effective photocatalyic material in spite of their larger surface areas rather than TiO2 nano-particles, because they indicate a poor crystallinity and a less intimate interaction or contact with CdS particles owing to the tubular morphology and a readily agglomeration among themselves.

Paper Details

Date Published: 11 September 2007
PDF: 9 pages
Proc. SPIE 6650, Solar Hydrogen and Nanotechnology II, 66500Y (11 September 2007); doi: 10.1117/12.732410
Show Author Affiliations
Sang-Jin Moon, Korea Research Institute of Chemical Technology (South Korea)
Hyun-Mi Lee, Korea Research Institute of Chemical Technology (South Korea)
Won-Wook So, Korea Research Institute of Chemical Technology (South Korea)
Jin-Ook Baeg, Korea Research Institute of Chemical Technology (South Korea)
Kijeong Kong, Korea Research Institute of Chemical Technology (South Korea)

Published in SPIE Proceedings Vol. 6650:
Solar Hydrogen and Nanotechnology II
Jinghua Guo, Editor(s)

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