Different nanostructured molybdenum disulfides (MoS2) were prepared during separate hydrothermal reactions using 1.6 g of sulfur source, i.e., thiourea (Sigma Aldrich, 99%), thioacetamide (Sigma Aldrich, 99%), or L-cysteine (Sigma Aldrich, 97%) and 1.6 g of sodium molybdate (Sigma Aldrich, 98%). Both precursors were dissolved together in 160 ml of deionized water and the pH of the solution was adjusted to 7 with the use of 1 M hydrochloric acid (POCH S.A). Hydrothermal syntheses were conducted in hydrothermal reactor (Parr 5500 HP) with stirring at 200 rpm during 24 h at 200 °C with 20 bar of internal pressure. After the reaction, black precipitate was collected through vacuum filtration and washing with aliquots of deionized water and ethanol. Powder materials were dried at 80 °C overnight. Micrometricsized MoS2 was purchased from Sigma-Aldrich (particle size below 2 µm, 99 %).