Nanostructuring of anodic copper oxides in fluoride-containing ethylene glycol media

OYARZÚN JEREZ, DIEGO P.; LÓPEZ TEIJELO, MANUEL; RAMOS CERVANTES, WILKENDRY; LINAREZ PÉREZ, OMAR E.; SÁNCHEZ, JULIO; PIZARRO, GUADALUPE DEL C.; ACOSTA, GABRIELA; FLORES, MARCOS; ARRATIA-PEREZ, RAMIRO; OYARZÚN JEREZ, DIEGO P.; LÓPEZ TEIJELO, MANUEL; RAMOS CERVANTES, WILKENDRY; LINAREZ PÉREZ, OMAR E.; SÁNCHEZ, JULIO; PIZARRO, GUADALUPE DEL C.; ACOSTA, GABRIELA; FLORES, MARCOS; ARRATIA-PEREZ, RAMIRO

JOURNAL OF ELECTROANALYTICAL CHEMISTRY - (Print)

ELSEVIER SCIENCE SA

Año: 2017 vol. 807 p. 181 - 186

1572-6657

We demonstrate that the anodization of copper in alkaline water/ethylene glycol media containing fluoride ions generates nanostructured copper oxide films. By modifying the anodization conditions (fluoride and OH- concentrations, applied voltage and anodization time), nanofibrillar Cu2O as well as highly rough nanofibrillar network or nanoporous mixed Cu2O/CuO films are obtained. Raman and X-ray Photoemission Spectroscopy (XPS) results indicate that in fluoride presence, Cu(I) oxide is obtained when anodization takes place applying low voltages at a relatively low OH- concentration. In comparison, the subsequent oxidation to obtain Cu(II) species (CuO and Cu(OH)2) is promoted by increasing the OH- contents. According to the present results, an oxidation reaction scheme is proposed in order to gain a deeper understanding in the preparation of controlled nanostructured copper oxide films.