The Role of Temperature in the Hydrothermal Synthesis on the Structural and Morphological Properties of MoS<sub>2</sub>
Hudya Fitra Hasmin, Cuk Imawan, Vivi Fauzia
Abstract
Abstract Molybdenum disulfide (MoS 2 ) generally has two main phases: semiconducting 2H-MoS 2 , with trigonal prismatic geometry, and metallic 1T-MoS 2 , with octahedral geometry. However, the 1T-MoS 2 phase is metastable, and improvements are still needed in the synthesis process. In this study, we synthesized MoS 2 using a simple hydrothermal method at either 180°C or 200°C for 24 h, using sodium molybdate dihydrate (Na 2 MoO 4 .2H 2 O) and thiourea (NH 2 CSNH 2 ) as the Mo and S precursors. The study found that synthesis at 180°C produces flower-like MoS 2 microspheres with an average diameter of 10 µm and a 1T phase, while MoS 2 produced at 200°C has irregular lumps with a size range of 1–10 µm in a 2H phase with slightly higher (002) d-spacing (6.78Å).