oa South African Journal of Chemistry - Synthesis of MoS inorganic fullerene-like nanoparticles by a chemical vapour deposition method : research article



MoS nanoparticles with fullerene-like structure (-MoS) were successfully obtained at heating temperature higher than 840 °C by a chemical vapour deposition method using MoO and sulfur powders as raw materials. The synthesized samples were characterized by XRD, SEM, TEM, EDX and Raman spectrometry, respectively. The reaction temperature has important influences on composition and morphology of the products, and pure -MoS nanoparticles can be obtained only in the narrow temperature range of 840-870 °C. Diffraction peak (002) of -MoS nanoparticles moves to small angle compared to that of 2H-MoS, indicating that the adjacent lattice spacing along the c-axis of -MoS nanoparticles is about 2 % larger than that of layered 2H-MoS. The peaks at 155 cm-1, 349.8 cm-1 and 281.7 cm-1 in the Raman spectrum of bulk and layered MoS are absent, which is attributed to MoS layer folding or curling along Γ-M in Brillouin zone to form fullerene-like polyhedra and nanotubes. In addition, a gradual formation mechanism of -MoS nanoparticles was discussed in detail.


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