Synthesis of mixed Cu/Ce oxide nanoparticles by the oil-in-water microemulsion reaction method

Pemartin Biernath, Kelly y Vela González, Andrea y Moreno Trejo, Maira y Leyva Porras, César y Castañeda Reyna, Iván Eduardo y Juárez Ramírez, Isaías y Solans, Conxita y Sánchez Domínguez, Margarita (2016) Synthesis of mixed Cu/Ce oxide nanoparticles by the oil-in-water microemulsion reaction method. Materials, 9 (6). p. 480. ISSN 1996-1944

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URL o página oficial: http://doi.org/10.3390/ma9060480

Resumen

Cerium oxide and mixed Cu/Ce oxide nanoparticles were prepared by the oil-in-water (O/W) microemulsion reaction method in mild conditions. The Cu/Ce molar ratio was varied between 0/100 and 50/50. According to X-ray diffraction (XRD), below 30/70 Cu/Ce molar ratio, the materials presented a single phase consistent with cubic fluorite CeO2. However, above Cu/Ce molar ratio 30/70, an excess monoclinic CuO phase in coexistence with the predominant Cu/Ce mixed oxide was detected by XRD and High-Resolution Transmission Electron Microscopy (HRTEM). Raman spectroscopy showed that oxygen vacancies increased significantly as the Cu content was increased. Band gap (Eg) was investigated as a function of the Cu/Ce molar ratio, resulting in values from 2.91 eV for CeO2 to 2.32 eV for the mixed oxide with 30/70 Cu/Ce molar ratio. These results indicate that below 30/70 Cu/Ce molar ratio, Cu2+ is at least partially incorporated into the ceria lattice and very well dispersed in general. In addition, the photodegradation of Indigo Carmine dye under visible light irradiation was explored for selected samples; it was shown that these materials can remove such contaminants, either by adsorption and/or photodegradation. The results obtained will encourage investigation into the optical and photocatalytic properties of these mixed oxides, for widening their potential applications.

Tipo de elemento: Article
Palabras claves no controlados: Mixed oxide nanoparticles, Microemulsion, Nanoreactor, CeO2 NPs, CuO NPs
Divisiones: Ingeniería Civil
Usuario depositante: Lic. Jesús E. Alvarado
Creadores:
CreadorEmailORCID
Pemartin Biernath, KellyNO ESPECIFICADONO ESPECIFICADO
Vela González, AndreaNO ESPECIFICADONO ESPECIFICADO
Moreno Trejo, MairaNO ESPECIFICADONO ESPECIFICADO
Leyva Porras, CésarNO ESPECIFICADONO ESPECIFICADO
Castañeda Reyna, Iván EduardoNO ESPECIFICADONO ESPECIFICADO
Juárez Ramírez, IsaíasNO ESPECIFICADONO ESPECIFICADO
Solans, ConxitaNO ESPECIFICADONO ESPECIFICADO
Sánchez Domínguez, MargaritaNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 11 Sep 2018 18:30
Última modificación: 09 Ago 2019 18:38
URI: http://eprints.uanl.mx/id/eprint/14770

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