A new approach for the synthesis of layered niobium sulfide and restacking route of NbS2 nanosheet

Kazuyoshi Izawa, Shintaro Ida, Ugur Unal, Tomoki Yamaguchi, Joo Hee Kang, Jin Ho Choy, Yasumichi Matsumoto

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have developed a new process for the synthesis of a layered niobium sulfide that involves heating K4Nb6O17·3H2O with a H2S/N2 gas mixture. It was confirmed that heating the starting layered oxide at 750 °C for 10 h under the gas flow yielded a highly crystalline, single-phase K0.34(H2O)0.7NbS2. The layered sulfide slabs had a large plate-like shape. Potassium ions in the interlayer of K0.34(H2O)0.7NbS2 could be exchanged with protons by stirring in 2 M H2SO4. It was found that the proton in the proton-exchanged form can be easily exchanged with other cations. The proton-exchanged form was exfoliated into NbS2 nanosheets by ultrasonication in water. According to the atomic force microscopy (AFM) images, NbS2 nanosheets had a thickness of around 4 Å, which roughly corresponded to the thickness of a single NbS2 host layer. NbS2 nanosheets could be restacked with the intercalation of Eu3+ or tetrabutylammonium ions by an electrostatic self-assembly deposition (ESD) technique.

Original languageEnglish
Pages (from-to)319-324
Number of pages6
JournalJournal of Solid State Chemistry
Volume181
Issue number2
DOIs
Publication statusPublished - Feb 1 2008

Fingerprint

Niobium
Nanosheets
Sulfides
niobium
Protons
sulfides
routes
protons
synthesis
Ions
Heating
heating
stirring
Intercalation
Gas mixtures
intercalation
Self assembly
Oxides
gas flow
gas mixtures

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Izawa, K., Ida, S., Unal, U., Yamaguchi, T., Kang, J. H., Choy, J. H., & Matsumoto, Y. (2008). A new approach for the synthesis of layered niobium sulfide and restacking route of NbS2 nanosheet. Journal of Solid State Chemistry, 181(2), 319-324. https://doi.org/10.1016/j.jssc.2007.12.002

A new approach for the synthesis of layered niobium sulfide and restacking route of NbS2 nanosheet. / Izawa, Kazuyoshi; Ida, Shintaro; Unal, Ugur; Yamaguchi, Tomoki; Kang, Joo Hee; Choy, Jin Ho; Matsumoto, Yasumichi.

In: Journal of Solid State Chemistry, Vol. 181, No. 2, 01.02.2008, p. 319-324.

Research output: Contribution to journalArticle

Izawa, K, Ida, S, Unal, U, Yamaguchi, T, Kang, JH, Choy, JH & Matsumoto, Y 2008, 'A new approach for the synthesis of layered niobium sulfide and restacking route of NbS2 nanosheet', Journal of Solid State Chemistry, vol. 181, no. 2, pp. 319-324. https://doi.org/10.1016/j.jssc.2007.12.002
Izawa, Kazuyoshi ; Ida, Shintaro ; Unal, Ugur ; Yamaguchi, Tomoki ; Kang, Joo Hee ; Choy, Jin Ho ; Matsumoto, Yasumichi. / A new approach for the synthesis of layered niobium sulfide and restacking route of NbS2 nanosheet. In: Journal of Solid State Chemistry. 2008 ; Vol. 181, No. 2. pp. 319-324.
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