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International Journal of Photoenergy
Volume 2013 (2013), Article ID 419182, 5 pages
http://dx.doi.org/10.1155/2013/419182
Research Article

H2 Fuels from Photocatalytic Splitting of Seawater Affected by Nano-TiO2 Promoted with CuO and NiO

1Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan
2Sustainable Environment Research Center, National Cheng Kung University, Tainan 70101, Taiwan
3Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
4Department of Environmental Science and Engineering, Tunghai University, Taichung 40704, Taiwan
5Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan

Received 30 May 2013; Revised 24 July 2013; Accepted 24 July 2013

Academic Editor: Jiaguo Yu

Copyright © 2013 A.-J. Simamora et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To enhance H2 yields from the photocatalytic splitting of seawater, better photocatalysts such as nanostructured TiO2 promoted with NiO (2.5%) and CuO (2.5%) have been studied in the present work. The accumulated H2 yielded from the photocatalytic splitting of seawater containing oxalic acid (50 mM) as the sacrificial reagents on CuO/nano-TiO2 is 8.53 μmol/gcat after the 5 h radiation. On the NiO/nano-TiO2 photocatalyst, the H2 yield is relatively low (i.e., 1.46 μmol/gcat). Note that the hole scavenging with chlorides in seawater may be associated with the less H2 yielded from the seawater photocatalysis (on CuO/nano-TiO2) if compared with that from water (42.4 μmol/gcat).