Controllable synthesis of Cu7Te4 nanoparticles and sheet-like particles through the delayed reaction and their thermal stability

► Phase-pure Cu7Te4 products were fabricated through delayed reaction. ► Cu7Te4 products consist of nanoparticles and sheet-like particles. ► The morphology of Cu7Te4 depends on the types of the organic solvent. ► Cu7Te4 nanostructures show morphology-dependent oxidation property.