Different MoS2 materials are synthesized from various sulfur precursors, namely thiourea (TU), thioacetamide (TAA), and L-cysteine (LC), by a hydrothermal approach at the same temperature, time, pH of the solution and precursor mass (Fig. ). Scanning electron microscopy (SEM) shows that dependent on the type of the precursor, different surface morphologies are obtained (Fig. ). Commercially available MoS2 (Comm) (Fig. ) utilized for comparison presents micrometer-sized secondary particles consisting of primary flakes with layered features shown at higher magnifications. In contrast, materials obtained via hydrothermal reactions show different morphologies and particle size distributions dependent on the type of precursor. MoS2 obtained from TU (Fig. ) shows tens of microns large structures with bump-like surface features, on which nanosized, perpendicularly oriented flakes are visible. In sharp contrast, MoS2 obtained from TAA (Fig. ) and from LC (Fig. ) show 0.5 -1 micron-sized secondary particle agglomerates consisting of smaller, below 100 nm sized primary particles. They follow a similar trend as previous reports, with