A Novel Gas Sensor Based on MgSb2O6 Nanorods to Indicate Variations in Carbon Monoxide and Propane Concentrations
Héctor Guillén-Bonilla,
Martín Flores-Martínez,
Verónica-María Rodríguez-Betancourtt,
Alex Guillen-Bonilla,
Juan Reyes-Gómez,
Lorenzo Gildo-Ortiz,
María de la Luz Olvera Amador,
Jaime Santoyo-Salazar
Affiliations
Héctor Guillén-Bonilla
Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, 44410 Guadalajara, JAL, Mexico
Martín Flores-Martínez
Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, 44410 Guadalajara, JAL, Mexico
Verónica-María Rodríguez-Betancourtt
Departamento de Químicas, CUCEI, Universidad de Guadalajara, 44410 Guadalajara, JAL, Mexico
Alex Guillen-Bonilla
Departamento de Ciencias Computacionales e Ingenierías, CUVALLES, Universidad de Guadalajara, Carretera Guadalajara-Ameca Km 45.5, 46600 Ameca, JAL, Mexico
Juan Reyes-Gómez
Facultad de Ciencias, Universidad de Colima, 28045 Colima, COL, Mexico
Lorenzo Gildo-Ortiz
Facultad de Ciencias, Universidad de Colima, 28045 Colima, COL, Mexico
María de la Luz Olvera Amador
Departamento de Ingeniería Eléctrica-SEES, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, 07360 México, DF, Mexico
Jaime Santoyo-Salazar
Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, 07360 México, DF, Mexico
Bystromite (MgSb2O6) nanorods were prepared using a colloidal method in the presence of ethylenediamine, after a calcination step at 800 °C in static air. From X-ray powder diffraction analyses, a trirutile-type structure with lattice parameters a = 4.64 Å and c = 9.25 Å and space group P42/mnm was identified. Using scanning electron microscopy (SEM), microrods with sizes from 0.2 to 1.6 μm were observed. Transmission electron microscopy (TEM) analyses revealed that the nanorods had a length of ~86 nm and a diameter ~23.8 nm. The gas-sensing properties of these nanostructures were tested using pellets elaborated with powders of the MgSb2O6 oxide (calcined at 800 °C) at temperatures 23, 150, 200, 250 and 300 °C. The pellets were exposed to different concentrations of carbon monoxide (CO) and propane (C3H8) at these temperatures. The results showed that the MgSb2O6 nanorods possess excellent stability and high sensitivity in these atmospheres.
