Merck

In-situ and tunable nitrogen-doping of MoS2 nanosheets.

Scientific reports (2014-12-24)
Si Qin, Weiwei Lei, Dan Liu, Ying Chen
ABSTRACT

Molybdenum disulfide (MoS2) nanosheets have unique physical and chemical properties, which make it a perfect candidate for next generation electronic and energy storage applications. Herein, we show the successful synthesis of nitrogen-doped MoS2 nanosheets by a simple, effective and large-scale approach. MoS2 nanosheets synthesised by this method show a porous structure formed by curled and overlapped nanosheets with well-defined edges. Analysis of the nanosheets shows that they have an enlarged interlayer distance and high specific surface area. X-ray photoelectron spectroscopy analysis shows the nanosheets have Mo-N bond indicating successful nitrogen doping. The nitrogen content of the product can be modulated by adjusting the ratio of starting materials easily within the range from ca. 5.8 to 7.6 at%.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Thiourea, ReagentPlus®, ≥99.0%
Sigma-Aldrich
5-Carboxy-fluorescein diacetate N-succinimidyl ester, for fluorescence, ≥95.0% (HPLC)
Sigma-Aldrich
5(6)-Carboxyfluorescein diacetate N-succinimidyl ester, BioReagent, suitable for fluorescence, ≥90% (HPLC)
Sigma-Aldrich
Thiourea, ACS reagent, ≥99.0%