▎ 摘　　要

NOVELTY - Copper acetate, zinc acetate, stannous chloride, and thioacetamide are dissolved in water. Aqueous ammonia is dripped to adjust the pH to neutral and obtain a neutral solution. The neutral solution is bubbled with nitrogen for 10 minutes, hydrothermally reacted at 200 degrees C for 24 hours, washed, and dried to obtain copper-zinc-tin sulfide nanoparticles. USE - Synthesis of copper-zinc-tin sulfide nanoparticles used for preparing copper-zinc-tin sulfide/graphene composites (claimed). ADVANTAGE - The method enables environmentally-friendly synthesis of copper-zinc-tin sulfide nanoparticles without using a surfactant. The obtained nanoparticles have small size and excellent conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of copper-zinc-tin sulfide/graphene composite, which involves dispersing graphene oxide in water to obtain a graphene oxide dispersion, dispersing the nanoparticles in water to obtain a nanoparticle dispersion, adding the graphene oxide dispersion to nanoparticle dispersion to obtain a mixed dispersion, adding methanol to the mixed dispersion to obtain a mixed solution, photoreducing the mixed solution for 5-8 hours, continuously bubbling nitrogen, collecting reduced product, cleaning, and drying.