Abstract
Recently, deep eutectic solvents (DESs) have received great interest as sustainable reaction media for nanoscale and functional materials. We report on a new choline chloride (ChCl) and thioacetamide (TAA) based DES for the synthesis of a series of binary metal sulfides including Sb2S3, Bi2S3, PbS, CuS, Ag2S, ZnS, and CdS. In these reactions, the ChCl/TAA based DES serves as “all‐in‐one” reactant, solvent, and template or deep eutectic solvent precursor (DESP). The reaction is supposed to proceed in two steps. A metal‐DES complex is first generated by adding the respective metal salts to the DES solution at a relatively low temperature. Then the metal‐DES complex decomposes to form the final metal sulfides products upon heating. This method provides a simple reaction system and a general strategy to synthesize metal sulfides. Some unique shaped products, such as Sb2S3 plates agglomerated by rod‐like particles, hexagonal CuS single crystals, and three‐dimensional hierarchical ZnS microspheres, are obtained via this method and the sizes and shapes of obtained samples can to some extent be controlled by temperature or reactant concentrations.
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