Article
Dynamic response of CoSb2O6 trirutile-type oxides in a CO2 atmosphere at low-temperatures
Fecha
2014Registro en:
10.3390/s140915802
Autor
Guillen-Bonilla, A.
Rodriguez-Betancourtt, V.-M.
Flores-Martinez, M.
Blanco-Alonso, O.
Reyes-Gomez, J.
Gildo-Ortiz, L.
Guillen-Bonilla, H.
Institución
Resumen
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 α= 4.6495 and c= 9.2763 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. © 2014 by the authors; licensee MDPI, Basel, Switzerland.