Figure 4.

Solution synthesis of tin telluride (SnTe) nanoparticles, (a) Na₂SnO₂ aqueous solution is injected with NaHTe solution, (b) Formation of tin telluride (SnTe) nanoparticles, (c) Photograph showing the solution after a scale-up synthesis, and (d) Typical yield of tin telluride (SnTe) nanoparticles prepared in a one-pot synthesis. Reproduced with permission from [62]. Copyright MDPI, 2017, (e) Bulk synthesis of copper sulfide by the ultrasonic experimental setup. (f) Photograph of prepared Copper sulfide using 1 M sulfur solution. Reproduced with permission from [63]. Copyright Elsevier, 2017.