A one-pot method for synthesis of reduced graphene oxide-supported Cu-Cu2O and catalytic application in tandem reaction of halides and sodium azide with terminal alkynes

Reduced graphene oxide (RGO)-supported Cu-Cu2O nanocomposite material (Cu-Cu2O@RGO) was prepared through a one-pot reflux synthesis method. The morphology, crystal structure and composition of the prepared Cu-Cu2O@RGO were characterized using transmission electron microscopy, X-ray diffraction, and X-ray photoelectron, infrared and Raman spectroscopies. Cu-Cu2O@RGO as a heterogeneous catalyst was applied to tandem reactions of halides and sodium azide with terminal alkynes to synthesize effectively 1,4-disubstituted 1,2,3-triazoles. Moreover, the catalyst showed excellent recyclability performance with very little leaching of the metal. Compared with homogeneous catalysts, Cu-Cu2O@RGO as a green and efficient catalyst was recoverable, easy to separate and highly stable in the tandem method for the synthesis of 1,2,3-triazole compounds.