Dynamic Response of CoSb2O6 Trirutile-Type Oxides in a CO2 Atmosphere at Low-Temperatures
Alex Guillén-Bonilla,
Verónica-María Rodríguez-Betancourtt,
Martín Flores-Martínez,
Oscar Blanco-Alonso,
Juan Reyes-Gómez,
Lorenzo Gildo-Ortiz,
Héctor Guillén-Bonilla
Affiliations
Alex Guillén-Bonilla
Materials Science Graduate School, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
Verónica-María Rodríguez-Betancourtt
Materials Science Graduate School, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
Martín Flores-Martínez
Materials Science Graduate School, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
Oscar Blanco-Alonso
Physics Department, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
Juan Reyes-Gómez
Faculty of Science, University of Colima, Bernal Díaz del Castillo 340, Colima, Colima 28045, Mexico
Lorenzo Gildo-Ortiz
Faculty of Chemical Sciences, University of Colima, Km 9 Carretera Colima-Coquimatlán, Coquimatlán 28400, Colima, Mexico
Héctor Guillén-Bonilla
Faculty of Chemical Sciences, University of Colima, Km 9 Carretera Colima-Coquimatlán, Coquimatlán 28400, Colima, Mexico
Experimental work on the synthesis of the CoSb2O6 oxide and its CO2 sensing properties is presented here. The oxide was synthesized by a microwave-assisted colloidal method in presence of ethylenediamine after calcination at 600 °C. This CoSb2O6 oxide crystallized in a tetragonal structure with cell parameters and Å, and space group P42/mnm. To prove its physical, chemical and sensing properties, the oxide was subjected to a series of tests: Raman spectroscopy, Scanning Electron Microscopy (SEM) and impedance (Z) measurements. Microstructures, like columns, bars and hollow hemispheres, were observed. For the CO2 sensing test, a thick film of CoSb2O6 was used, measuring the impedance variations on the presence of air/CO2 flows (0.100 sccm/0.100 sccm) using AC (alternating current) signals in the frequency-range 0.1–100 kHz and low relative temperatures (250 and 300 °C). The CO2 sensing results were quite good.
