Journal
CHEMISTRYSELECT
Volume 1, Issue 11, Pages 2610-2616Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201600324
Keywords
Niobium disulfide; Intercalation; Superconductor; Polymorph; XPS analysis
Categories
Funding
- National Natural Science Foundation of China [21171158]
- National Basic Research Program of China [2010CB934700]
Ask authors/readers for more resources
A new polymorph of potassium intercalation compound of 3RNb(1.1)S(2) with chemical composition K0.77Nb1.1S2 was synthesized for the first time by a facile solution-phase method. Its structure was comprehensively characterized by powder XRD and high-resolution TEM. Furthermore, its hydrated derivatives K-x Nb1.1S2 center dot yH(2)O were synthesized via soft chemistry strategy using etching agents of ethanol, water and an I-2/CH3CN solution, respectively. Superconducting transition at 4.0 K was observed for the product with the doping content x = 0.12. While superconductivity disappeared in products KxNb1.1S2 center dot yH(2)O (x = 0.48 and 0.35) which displayed a metal-to-semiconductor transition at low temperature. In addition, the XPS analysis revealed an upward shift in the Fermi level in K0.12Nb1.1S2 center dot yH(2)O compared with the host or K0.77Nb1.1S2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available