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Swelling of Layered Potassium Ruthenate into Nanosheet Crystallites

Published online by Cambridge University Press:  01 February 2011

Katsutoshi Fukuda ,
Hisato Kato ,
Wataru Sugimoto  and
Yoshio Takasu
Katsutoshi Fukuda
Affiliation:
kfukuda@shinshu-u.ac.jp, Shinshu University, Collaborative Innovation Center for Nanotech Fiber, Ueda, Nagano, Japan
Hisato Kato
Affiliation:
imc@shinshu-u.ac.jp, Shinshu University, Faculty of Textile Science and Technology, Japan
Wataru Sugimoto
Affiliation:
wsugi@shinshu-u.ac.jp, Shinshu University, Faculty of Textile Science and Technology, Japan
Yoshio Takasu
Affiliation:
ytakasu@shinhu-u.ac.jp, Shinshu University, Faculty of Textile Science and Technology, Japan
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Abstract

The swelling and exfoliation behaviors of layered potassium ruthenate and the resultant unilamellar crystallites of RuO2.10.2− with nanosheet morphology were studied. The reaction of layered H0.2RuO2.1·0.9H2O with tetrabutylammonium hydroxide (TBA+OH−) was found to be extremely sensitive to the interlayer water content. The use of highly hydrous layered protonic ruthenate was essential for obtaining direct exfoliation. The swelling behavior was also affected by the ratio of TBA+ to ion-exchangeable H+ in the layered compound. At low ratios of TBA+/H+≤1, the layered precursor scarcely exfoliated and mostly deposited as an intercalation compound. In the intermediate TBA+/H+ range, an auburn colloidal suspension containing exfoliated nanosheets was formed, while much larger ratios were less favorable for the exfoliation.

Keywords

intercalationlayeredsurface chemistry
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1148: Symposium PP – Solid-State Chemistry of Inorganic Materials VII , 2008 , 1148-PP03-36
Copyright
Copyright © Materials Research Society 2009

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