Synthesis of CuS by elemental-direct-reaction in a reline deep eutectic solvent and its catalytic activity in the thermal decomposition of ammonium perchlorate

Micro-sized copper sulfide (CuS) has been successfully synthesized via an elemental-direct-reaction route in a reline deep eutectic solvent at a low temperature condition (50 °C). The copper sulfide was characterized by X-ray diffraction pattern, scanning electron microscopy images, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The as-synthesized copper sulfide was pure hexagonal phase microspheres (about 4.0–4.3 μm in diameter), which were assembled with randomly oriented thin slices (about 18 nm in thickness). Moreover, the CuS samples showed high catalytic activity for the thermal decomposition of ammonium perchlorate.