Present work deals with the synthesis of 2H-WSe₂ utilizing a facile and cost-effective hydrothermal approach. For this a certain amount of selenium (Se) powder was dissolved in 50 mL DMF. After that sodium tungustate dehydrate (Na₂WO₄.2H₂O) was then mixed with the as prepared blackish solution was vigorously stirred magnetically. As obtained product was kept in 100 mL Teflon lined stainless steel autoclave and further processed hy-drothermally for 48 hours at 200°C in a hot air oven. After cooling down to room temperature the solution was filtered off and washed with Millipore water and absolute ethanol many times until the product was free from organic as well as inorganic impurities. Final product is obtained by drying the black precipitate for 24 hours at 60°C to be used for further characterizations. The crystallographic characteristics were carried out using powder X- ray diffraction. The strongest intensity peak at 13.14° belongs to (002) plane suggests the formation of hexagonal WSe₂ with space group P63/mmc (194). Using Williamson-Hall (W-H) plot average crystallite size (D_avg) is estimated about 3.53 nm. The crystallite size obtained from Scherrer’s relation lies in range 3.37 nm to 29.56 nm. The strain value -0.07064 confirms the compressive strain is in the synthesized WSe₂ product. The interplaner spacing for (002) plane from Bragg’s law is  6.75 nm which is in a good agreement with JCPDS card no. 00-006-0080 again confirming the formation of WSe₂.

Hydrothermal, WSe₂, X-Ray Diffraction, Interplaner Spacing, Strain