SÍNTESIS Y CARACTERIZACIÓN ESTRUCTURAL DE NANOPOLVOS DE COBRE (0) OBTENIDOS POR TÉCNICAS DE MICROONDAS (MW) Y REACCIÓN DE HIDROGENACIÓN SOLVOTERMAL A ALTA PRESIÓN (HP) USANDO FLUIDOS SUPERCRÍTICOS (FSC)

This paper describes the synthesis of copper (0) nanopowder via MW and SCF. From CuSO 4 .5H 2 O, CuO was obtained and from this precursor copper Formate (II) was synthesized with MW radiation of a household oven at 30% of power, for a period from 4 to 6 hours. Then, keeping the same power, reflux system is changed by a buld distillation, where the powders of copper (0) are obtained by decomposition of the precursor which autocatalized at (368-436 °K),this reducing conditions allows the transformation from Cu (II) to Cu (0). Also high volumes of Cu(0) nanopowder, were obtained using ethanol as SCF, in a reducing atmosphere of H 2 , at Tmax 270° C and at Pmax 2425 psi in a microreactor PARR model 4560 (100mL, 200 bars) applied on the copper precursor. The products were characterized by UV, XRD, FTIR, FRX.