<p>The use of thermoelectric materials to recover waste heat and convert it into electrical energy is becoming increasingly popular. Sb₂Te₃ is currently being developed in the fabrication of thermoelectric devices because it can function as a degenerate semiconductor with high electrical conductivity and Seebeck coefficient. In this study, we investigate the nanostructure changes by modifying the hydrothermal synthesis conditions of Sb₂Te₃ thermoelectric semiconductor, and propose a novel stirring-assisted hydrothermal synthesis strategy. The morphology and crystal phase changes of Sb₂Te₃ nanostructures depending on stirring during hydrothermal synthesis are confirmed by scanning electron microscope and x-ray diffraction analyses. The results of this study are expected to contribute to the efficient utilization of energy and the development of environmentally friendly technology by proposing a stirring-assisted hydrothermal synthesis strategy for thermoelectric materials including Sb₂Te₃.</p> Graphical Abstract <p></p>