Fig. 5From: Copper oxide–graphene oxide nanocomposite: efficient catalyst for hydrogenation of nitroaromatics in waterReuse of the CuO–GO nanocomposite catalyst in the heterogeneous reduction of 4-nitrotoluene. Reaction conditions: 4-nitrotoluene (1 mmol), NaBH4 (1.2 mmol), catalyst (50 mg), room temperature, aqueous solution, and 30 min. The yields were determined by GC–MSBack to article page