Next Article in Journal
Spark Plasma Co-Sintering of Mechanically Milled Tool Steel and High Speed Steel Powders
Next Article in Special Issue
Enhancement of TiO2 NPs Activity by Fe3O4 Nano-Seeds for Removal of Organic Pollutants in Water
Previous Article in Journal
Role of Chloride in the Corrosion and Fracture Behavior of Micro-Alloyed Steel in E80 Simulated Fuel Grade Ethanol Environment
Open AccessArticle

Synthesis of Mixed Cu/Ce Oxide Nanoparticles by the Oil-in-Water Microemulsion Reaction Method

Institut de Química Avançada de Catalunya (IQAC-CSIC) y CIBER en Biotecnología, Biomateriales y Nanomedicina (Ciber-BBN), Jordi Girona 18-26, Barcelona 08034, Spain
Mc Bride Chemolux S.A.R.L, Rue de I’Industrie, Foetz 3895, Luxembourg
Centro de Investigación en Materiales Avanzados, S. C. (CIMAV), Unidad Monterrey, Alianza Norte 202, Parque de Investigación e Innovación Tecnológica, Apodaca 66628, Mexico
Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía. Cd. Universitaria, San Nicolás de los Garza 66455, Mexico
Author to whom correspondence should be addressed.
Academic Editors: Andrea P. Reverberi and Marco Salerno
Materials 2016, 9(6), 480;
Received: 25 April 2016 / Revised: 6 June 2016 / Accepted: 10 June 2016 / Published: 16 June 2016
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. View Full-Text
Keywords: mixed oxide nanoparticles; microemulsion; nanoreactor; CeO2 NPs; CuO NPs mixed oxide nanoparticles; microemulsion; nanoreactor; CeO2 NPs; CuO NPs
Show Figures

Figure 1

MDPI and ACS Style

Pemartin-Biernath, K.; Vela-González, A.V.; Moreno-Trejo, M.B.; Leyva-Porras, C.; Castañeda-Reyna, I.E.; Juárez-Ramírez, I.; Solans, C.; Sánchez-Domínguez, M. Synthesis of Mixed Cu/Ce Oxide Nanoparticles by the Oil-in-Water Microemulsion Reaction Method. Materials 2016, 9, 480.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop