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Title
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Pd nanoparticles on whiskers : aggregation and reactivity in CO detection
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Author
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Abstract
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| Single crystal antimony-doped SnO2 whiskers have been synthesized by in situ doping process in horizontal flow reactor. The produced whiskers were modified with 0.1, 0.2, 0.5, 1 or 2 wt.% Pd. The processes of Pd particles growth and aggregation are described on the base of AFM and STEM data. Depending on the content of introduced Pd precursor, the various mechanisms (Volmer-Weber or Stranski-Krastanov) of Pd nanoparticles growth realize. The dependence of sensor signal to CO on Pd concentration has non-monotonous character determined by the size of Pd nanoparticles and their aggregation degree. The best sensor signal toward CO was observed for whiskers decorated with 0.1 wt.% Pd. This concentration corresponds to the presence of individual 3-5 nm Pd nanoparticles on the surface of the whiskers. (C) 2013 Elsevier B.V. All rights reserved. |
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Language
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English
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Source (journal)
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Journal of alloys and compounds. - Amsterdam
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Publication
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Amsterdam
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2013
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ISSN
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0925-8388
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DOI
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10.1016/J.JALLCOM.2013.02.184
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Volume/pages
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565
(2013)
, p. 6-10
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ISI
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000317815300002
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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