A new CO2 detection system based on the trirutile-type CoSb2O6 oxide
| Autor: | Nancy Elizabeth Franco Rodríguez, Verónica María Rodríguez Betancourtt, Lorenzo Gildo Ortiz, Héctor Guillen Bonilla, Juan Reyes Gómez, Alex Guillen Bonilla, Oscar Blanco Alonso, Antonio Casillas Zamora, José Trinidad Guillen Bonilla |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxide Analytical chemistry chemistry.chemical_element Ethylenediamine 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Tetragonal crystal system chemistry.chemical_compound Colloid chemistry Antimony Phase (matter) Electrical and Electronic Engineering 0210 nano-technology Cobalt |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:15741-15753 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-9228-4 |
| Popis: | CoSb2O6 powders were synthesized by means of the colloidal method, using cobalt nitrate, antimony chloride, ethylenediamine, and ethyl alcohol as reagents. The crystalline phase of the oxide was obtained at 600 °C and analyzed by X-ray diffraction. The CoSb2O6 showed a tetragonal crystalline structure with cell parameters a = 4.6495 A, c = 9.2763 A, and a P42/mnm spatial group. The powders were analyzed by means of field emission scanning electron microscopy, finding microcubes (3D) with sizes of 10–25 µm, and microrods with lengths and diameters of 13–27 and 4.5–13.5 µm, respectively. Thick films prepared with oxide’s powders were exposed to air-CO2 (100‒100 ppm) atmospheres at 250 °C. Material’s response increased as the CO2 was injected into the measuring chamber, recording a phase change and an average impedance magnitude (Δ|Z|) of ~ 2.623 kΩ. Low CO2 concentrations were detected at relatively low temperatures, which turns the CoSb2O6 into a potential gas sensor. Taking advantage of this, an electronic device was successfully developed to detect concentrations of CO2. |
| Databáze: | OpenAIRE |
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