Combustion syntheses of Co3O4 powders using different fuels

Authors
Gardey Merino, Maria Celeste; Tornello Nasisi, Leonardo D.; Montoya, William M.; Urrutia Aguilera, Jesus N.; Fernandez, Maria Emilia; Lascalea, Gustavo Enrique; Vazquez, Patricia Graciela
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
Co3O4 powders are used as pigment in solar selective paints. In this work, two new gel-combustion processes for the synthesis of Co3O4 nanopowders with lysine (Lys) or ethylenediaminetetraacetic acid (Edta) as fuel are presented. The first route is a conventional, stoichiometric process, while the second one is a non-stoichiometric, pH-controlled process. The samples were calcined in air at 500 ºC. They were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrum (FTIR), Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) and the optical properties of the pigments were assessed with a spectrophotometer. In all cases, powders exhibited the Co3O4 crystalline structure. A minimum crystallite average size of 19 nm for powders obtained by the ?stoichiometric/Lys? combustion route was observed, meanwhile, a maximum value of 47 nm was stated for powders obtained by the ?non-stoichiometric/Edta? combustion process. The average particle size ranged between 50 and 100 nm. The powders obtained by the stoichiometric nitrate?lysine route were selected to study its optical properties, their solar absorption was 88%, compared with the references, evidencing their aptitude to be used in solar absorbent paints.
Fil: Gardey Merino, Maria Celeste. Universidad Tecnologica Nacional. Facultad Reg.mendoza. Grupo Cliope Energia, Ambiente y Desarrollo Sustentable; Argentina
Fil: Tornello Nasisi, Leonardo D.. Universidad Tecnologica Nacional. Facultad Reg.mendoza. Grupo Cliope Energia, Ambiente y Desarrollo Sustentable; Argentina
Fil: Montoya, William M. . Universidad Tecnologica Nacional. Facultad Reg.mendoza. Grupo Cliope Energia, Ambiente y Desarrollo Sustentable; Argentina
Fil: Urrutia Aguilera, Jesus N. . Universidad Tecnologica Nacional. Facultad Reg.mendoza. Grupo Cliope Energia, Ambiente y Desarrollo Sustentable; Argentina
Fil: Fernandez, Maria Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina
Fil: Lascalea, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Subject
combustion synthesis
selective painting
CoAl2O4
pigments
Ingeniería Química
Ingeniería Química
INGENIERÍAS Y TECNOLOGÍAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/9288