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CdS-sensitized single-crystalline TiO2 nanorods and polycrystalline nanotubes for solar hydrogen generation

Published online by Cambridge University Press:  22 November 2012

Ulugbek Shaislamov  and
Bee Lyong Yang
Ulugbek Shaislamov
Affiliation:
Department of Information and Nanomaterials Engineering, School of Advanced Materials and System Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea
Bee Lyong Yang*
Affiliation:
Department of Information and Nanomaterials Engineering, School of Advanced Materials and System Engineering, Kumoh National Institute of Technology, Gumi 730-701, Korea
*
a)Address all correspondence to this author. e-mail: blyang@kumoh.ac.kr
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Abstract

We report results of comparative study of photocatalytic properties of polycrystalline TiO2 nanotubes and single-crystalline nanorods. It is demonstrated that single-crystalline nanorods show superior photocatalytic properties compared to polycrystalline nanotubes due to low recombination of photoexcited carriers. Grain boundaries in polycrystalline nanotubes act as a barrier of the effective carrier pathway. Visible light activity of the TiO2 nanostructures is enhanced by the sensitization of CdS nanoparticles on TiO2. Subsequent heat treatment of the CdS/TiO2 heterostructures led to the dramatically enhanced photoresponse under both white and visible light irradiation, which was attributed to the improved crystallinity of CdS nanoparticles and TiO2nanostructures.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 3: Focus Issue: Titanium Dioxide Nanomaterials , 14 February 2013 , pp. 418 - 423
Copyright
Copyright © Materials Research Society 2012

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References

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