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Structural Properties and Phase Transition of Exfoliated-Restacked Molybdenum Disulfide

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journal contribution
posted on 25.04.2013, 00:00 by Alexander S. Goloveshkin, Ivan S. Bushmarinov, Natalia D. Lenenko, Mikhail I. Buzin, Alexandre S. Golub, Mikhail Yu. Antipin
The product of exfoliation and restacking of MoS2 in acidic conditions is studied in detail using X-ray powder diffraction, transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The temperature dependence of powder patterns reveals that the heating of exfoliated-restacked MoS2 is a way to a new nanostructured MoS2-based layered material that remains nanosized even upon heating to 850 °C. Previously this material has been described as 2H-MoS2, but according to the X-ray diffraction (XRD) data, its structure cannot be correctly described by any of the “usual” MoS2 polytypes. A model of the structure of the material describing its XRD patterns and thermal behavior is discussed in detail.