Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films
Sensitive and selective personal exposure monitors are needed to assess ozone (O<sub>3</sub>) concentrations in the workplace atmosphere in real time for the analysis and prevention of health risks. Here, a cumulative gas sensor using visible spectroscopy for real-time O<sub>3</...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/16/3508 |
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| author | Christelle Ghazaly Marc Hébrant Eddy Langlois Blandine Castel Marianne Guillemot Mathieu Etienne |
| author_facet | Christelle Ghazaly Marc Hébrant Eddy Langlois Blandine Castel Marianne Guillemot Mathieu Etienne |
| author_sort | Christelle Ghazaly |
| collection | DOAJ |
| description | Sensitive and selective personal exposure monitors are needed to assess ozone (O<sub>3</sub>) concentrations in the workplace atmosphere in real time for the analysis and prevention of health risks. Here, a cumulative gas sensor using visible spectroscopy for real-time O<sub>3</sub> determination is described. The sensing chip is a mesoporous silica thin film deposited on transparent glass and impregnated with methylene blue (MB). The sensor is reproducible, stable for at least 50 days, sensitive to 10 ppb O<sub>3</sub> (one-tenth of the occupational exposure limit value in France, Swiss, Canada, U.K., Japan, and the USA) with a measurement range tested up to 500 ppb, and insensitive to NO<sub>2</sub> and to large variation in relative humidity. A model and its derivative as a function of time are proposed to convert in real time the sensor response to concentrations, and an excellent correlation was obtained between those data and reference O<sub>3</sub> concentrations. This sensor is based on a relatively cheap sensing material and a robust detection system, and its analytical performance makes it suitable for monitoring real-time O<sub>3</sub> concentrations in workplaces to promote a safer environment for workers. |
| first_indexed | 2024-04-11T20:43:56Z |
| format | Article |
| id | doaj.art-de94415243244994887b30987284f7b0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T20:43:56Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-de94415243244994887b30987284f7b02022-12-22T04:04:07ZengMDPI AGSensors1424-82202019-08-011916350810.3390/s19163508s19163508Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica FilmsChristelle Ghazaly0Marc Hébrant1Eddy Langlois2Blandine Castel3Marianne Guillemot4Mathieu Etienne5Département de Métrologie des Polluants, Institut National de Recherche et de Sécurité (INRS), 54500 Vandœuvre-lès-Nancy, FranceLaboratoire de Chimie Physique et Microbiologie pour les Matériaux et l’Environnement (LCPME), UMR 7564 CNRS-Université de Lorraine, 405 rue de Vandœuvre, 54600 Villers-lès-Nancy, FranceDépartement de Métrologie des Polluants, Institut National de Recherche et de Sécurité (INRS), 54500 Vandœuvre-lès-Nancy, FranceDépartement de Métrologie des Polluants, Institut National de Recherche et de Sécurité (INRS), 54500 Vandœuvre-lès-Nancy, FranceDépartement de Métrologie des Polluants, Institut National de Recherche et de Sécurité (INRS), 54500 Vandœuvre-lès-Nancy, FranceLaboratoire de Chimie Physique et Microbiologie pour les Matériaux et l’Environnement (LCPME), UMR 7564 CNRS-Université de Lorraine, 405 rue de Vandœuvre, 54600 Villers-lès-Nancy, FranceSensitive and selective personal exposure monitors are needed to assess ozone (O<sub>3</sub>) concentrations in the workplace atmosphere in real time for the analysis and prevention of health risks. Here, a cumulative gas sensor using visible spectroscopy for real-time O<sub>3</sub> determination is described. The sensing chip is a mesoporous silica thin film deposited on transparent glass and impregnated with methylene blue (MB). The sensor is reproducible, stable for at least 50 days, sensitive to 10 ppb O<sub>3</sub> (one-tenth of the occupational exposure limit value in France, Swiss, Canada, U.K., Japan, and the USA) with a measurement range tested up to 500 ppb, and insensitive to NO<sub>2</sub> and to large variation in relative humidity. A model and its derivative as a function of time are proposed to convert in real time the sensor response to concentrations, and an excellent correlation was obtained between those data and reference O<sub>3</sub> concentrations. This sensor is based on a relatively cheap sensing material and a robust detection system, and its analytical performance makes it suitable for monitoring real-time O<sub>3</sub> concentrations in workplaces to promote a safer environment for workers.https://www.mdpi.com/1424-8220/19/16/3508ozoneoptical gas sensormesoporous silicamethylene blueoccupational exposure |
| spellingShingle | Christelle Ghazaly Marc Hébrant Eddy Langlois Blandine Castel Marianne Guillemot Mathieu Etienne Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films Sensors ozone optical gas sensor mesoporous silica methylene blue occupational exposure |
| title | Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films |
| title_full | Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films |
| title_fullStr | Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films |
| title_full_unstemmed | Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films |
| title_short | Real-Time Ozone Sensor Based on Selective Oxidation of Methylene Blue in Mesoporous Silica Films |
| title_sort | real time ozone sensor based on selective oxidation of methylene blue in mesoporous silica films |
| topic | ozone optical gas sensor mesoporous silica methylene blue occupational exposure |
| url | https://www.mdpi.com/1424-8220/19/16/3508 |
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