A new approach for the preparation, exfoliation, and intercalation properties of niobium layered sulfide material

Kazuyoshi Izawa, Shintaro Ida, Ugur Unal, Tomoki Yamaguchi, Yasumichi Matsumoto

Research output: Contribution to journalArticle


We have developed the new process that can synthesize a layered niobium sulfide under heating a layered oxide with H2S/N2 gas mixture. It was confirmed that K0.34(H2O)xNbS2 was obtained as a single phase and high crystallinity under heating K4Nb6O17·3H2O with the gas at 750°C for 10 h and washing with distilled water. The layered sulfide had the large plate-like shapes that have 50 μm wide length on average. Potassium ions in the interlayer of K0.34(H2O)yNbS2 could be exchanged to hydronium ions by stirring 2M H2SO4. It was also confirmed that tetrabutylammonium could intercalate in interlayer of proton exchanged form. In addition, colloidal solution was obtained after ultrasonication of proton exchanged form. According to the AFM image, the thickness of sulfide nanosheets had 4.2 Å, which roughly corresponded with the thickness of NbS2 single layer.

Original languageEnglish
Pages (from-to)181-185
Number of pages5
JournalSynthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry
Issue number2 PART 1
Publication statusPublished - Mar 1 2008


All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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