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Morphology influence on photocatalytic activity of tungsten oxide loaded by platinum nanoparticles

Published online by Cambridge University Press:  31 January 2011

Mohsen Khajeh Aminian  and
Jinhua Ye
Mohsen Khajeh Aminian
Affiliation:
International Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan
Jinhua Ye*
Affiliation:
International Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan; and Photocatalytic Materials Center, National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan
*
a)Address all correspondence to this author. e-mail: Jinhua.YE@nims.go.jp
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Abstract

Photocatalytic activity of different morphologies of tungsten oxide was investigated before and after platinum loading. Different shape particles of tungsten oxide were synthesized using peroxo tungstic acid solution as a basic precursor and different methods. The prepared materials were composed of nanoparticles, nanorods, and nanosheets that formed different morphologies. The results of photodegradation with isopropyl alcohol (IPA) under visible light showed that the samples composed of nanostructures with an average lateral thickness of 20 to 47 nm were more active than one composed of broad nanosheets with a thickness of 60 nm. The samples were loaded with a platinum cocatalyst. The results of photocatalytic evaluation of loaded samples showed that the photooxidation reaction of samples with a smaller feature was accelerated with a higher rate rather than one with broad nanosheets. We conclude that although loading of a cocatalyst promoted the photocatalytic activity, it is not capable of compensating for the morphology influence on the photocatalytic activity.

Keywords

CatalyticMorphologyNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 1: Photocatalysis for Energy and Environmental Sustainability , January 2010 , pp. 141 - 148
Copyright
Copyright © Materials Research Society 2010

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