Preparation and Characterization of MoS₂ Microsphere by Hydrothermal Method

Abstract:

In this work, MoS₂ microsphere was synthesized by hydrothermal reaction, in which thiourea (CS(NH₂)₂) was used as S-source and reducing agent, ammonium heptamolybdate ((NH₄)₆Mo₇O₂₄.4H₂O) was used as Mo-source. The influence of temperature, as well as different dispersing agents, on the reaction product’s morphology, structure and phase composition was discussed. X-ray diffraction results show that all the as-synthesized products are the hexagonal 2H-MoS2 without impurity. SEM images of the as-prepared MoS2 samples without adding any dispersing agent present spherical morphology with sheet-like structures shaped on the surface. A possible formation mechanism of the MoS2 microsphere is that of self-assembly growth process; In addition, for the samples adding surfactant CTAB, SDBS or PVP in the reactants, the MoS2 is confined to layered structure. Compared with SDBS and PVP, CTAB has the best dispersion effect which ensure the as-synthesized microsphere with about 300nm average diameter, and the influence mechanism of which can be deduced as electrostatic interaction and stereo-hindrance effect.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 306-309
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.306
• Online since: January 2013
• Authors: Ya Ru Cui, Jiang Shan He, Xiao Ming Li, Jun Xue Zhao, Ao Li Chen, Jun Yang
• Keywords: Dispersing Agent, Hydrothermal Synthesis, MoS₂ Microsphere

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