Toxic Gas Detectors Based on a MnSb2O6 Oxide Chemical Sensor
| Autor: | Trinidad, Guillen Bonilla, José, Héctor, Guillen Bonilla, Maricela, Jiménez Rodríguez, Alex, Guillen Bonilla, María, Rodríguez Betancourtt, Verónica, Manuel, Rangel Cobian, Víctor, Eugenia, Sánchez Morales, María, Antonio, Casillas Zamora |
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| Rok vydání: | 2023 |
| Zdroj: | Metal-Oxide Gas Sensors ISBN: 9781803569628 Metal-Oxide Gas Sensors |
| DOI: | 10.5772/intechopen.107398 |
| Popis: | We synthesized the semiconductor oxide MnSb2O6 through a wet chemical process assisted by low-power microwave radiation. A gas-sensitive sensor was elaborated from the MnSb2O6 powders obtained by calcination at 600°C. The sensor was electrically characterized in static CO and C3H8 atmospheres by measuring direct current signals at 100, 200, and 300°C. The toxic gases’ concentrations were 1, 5, 50, 100, 200, 300, 400, and 500 ppm of C3H8; and 1, 5, 50, 100, 200, and 300 ppm of CO. From the MnSb2O6’s electrical resistance results, a sensor’s operational point and a low-cost analog circuit were proposed, obtaining two new prototypes: one for detecting C3H8 and a second one for detecting CO. We selected the response at 200°C and 5 ppm for both cases. Notably, this concentration (5 ppm) is selectable with a calibration resistance, generating an alarm signal of ≈11.3V at a supply voltage of 120 V AC. The toxic gas detectors showed excellent functionality. The resistive sensor showed high sensitivity and good electrical response, while the analog circuit presented a rapid response. Due to the operating temperature employed (200°C), these devices could find practical applications, for example, exothermic generators and heaters. |
| Databáze: | OpenAIRE |
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