Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature
Semiconductor metal oxide gas sensors are widely used to detect ethanol vapours, commonly used in industrial productions, road safety detection, and solvent production; however, they operate at extremely high temperatures. In this work, we present manganese dioxide nanorods (MnO2 NRs) prepared via h...
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Elsevier
2025-01-01
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| author | Lesego Malepe Derek Tantoh Ndinteh Patrick Ndungu Messai Adenew Mamo |
| author_facet | Lesego Malepe Derek Tantoh Ndinteh Patrick Ndungu Messai Adenew Mamo |
| author_sort | Lesego Malepe |
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| description | Semiconductor metal oxide gas sensors are widely used to detect ethanol vapours, commonly used in industrial productions, road safety detection, and solvent production; however, they operate at extremely high temperatures. In this work, we present manganese dioxide nanorods (MnO2 NRs) prepared via hydrothermal synthetic route, carbon soot (CNPs) prepared via pyrolysis of lighthouse candle, and poly-4-vinylpyridine (P4VP) composite for the detection of ethanol vapour at room temperature. MnO2, CNPs, P4VP, and MnO2 NRs-CNPs-P4VP composite were characterised using scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. Five sensors were prepared, namely, sensor 1 (MnO2-NRs), sensor 2 (CNPs), sensor 3 (CNPs-P4VP composite of a mass ratio of 1:3), sensor 4 (MnO2 NRs-CNPs-P4VP composite of a mass ratio 1:1:3), and sensor 5 (MnO2 NRs-CNPs-P4VP composite of a mass ratio 2:1:3). All the five sensors were used detect to 2-propanol, acetone, ethanol, methanol, and mesitylene vapours at room temperature, but among all the tested sensors, sensor 4 was highly sensitive to ethanol vapour and less sensitive to 2-propanol, methanol, acetone, and mesitylene vapours. The response and recovery time of sensor 4 towards ethanol vapour at 20.4 ppm were 82 seconds and 74 seconds, respectively. The limit of detection on ethanol vapour using sensor 4 was 789 ppb. During detection, the ethanol vapour undergoes total deep oxidation on the surface of sensor 4. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| spelling | doaj-art-dd5f5e035ca84b5c9585b84c6af07b862025-01-17T04:49:58ZengElsevierHeliyon2405-84402025-01-01111e40993Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperatureLesego Malepe0Derek Tantoh Ndinteh1Patrick Ndungu2Messai Adenew Mamo3Department of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, 2028, Johannesburg, South AfricaDepartment of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, 2028, Johannesburg, South AfricaDepartment of Chemistry, University of Pretoria, Private Bag X20, Hatfield, 0028, Pretoria, South AfricaDepartment of Chemical Sciences, University of Johannesburg, PO Box 17011, Doornfontein, 2028, Johannesburg, South Africa; Corresponding author.Semiconductor metal oxide gas sensors are widely used to detect ethanol vapours, commonly used in industrial productions, road safety detection, and solvent production; however, they operate at extremely high temperatures. In this work, we present manganese dioxide nanorods (MnO2 NRs) prepared via hydrothermal synthetic route, carbon soot (CNPs) prepared via pyrolysis of lighthouse candle, and poly-4-vinylpyridine (P4VP) composite for the detection of ethanol vapour at room temperature. MnO2, CNPs, P4VP, and MnO2 NRs-CNPs-P4VP composite were characterised using scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. Five sensors were prepared, namely, sensor 1 (MnO2-NRs), sensor 2 (CNPs), sensor 3 (CNPs-P4VP composite of a mass ratio of 1:3), sensor 4 (MnO2 NRs-CNPs-P4VP composite of a mass ratio 1:1:3), and sensor 5 (MnO2 NRs-CNPs-P4VP composite of a mass ratio 2:1:3). All the five sensors were used detect to 2-propanol, acetone, ethanol, methanol, and mesitylene vapours at room temperature, but among all the tested sensors, sensor 4 was highly sensitive to ethanol vapour and less sensitive to 2-propanol, methanol, acetone, and mesitylene vapours. The response and recovery time of sensor 4 towards ethanol vapour at 20.4 ppm were 82 seconds and 74 seconds, respectively. The limit of detection on ethanol vapour using sensor 4 was 789 ppb. During detection, the ethanol vapour undergoes total deep oxidation on the surface of sensor 4.http://www.sciencedirect.com/science/article/pii/S2405844024170247EthanolSolid-state sensorMnO2 NRsPolymer compositesSemiconductor metal oxide |
| spellingShingle | Lesego Malepe Derek Tantoh Ndinteh Patrick Ndungu Messai Adenew Mamo Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature Heliyon Ethanol Solid-state sensor MnO2 NRs Polymer composites Semiconductor metal oxide |
| title | Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature |
| title_full | Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature |
| title_fullStr | Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature |
| title_full_unstemmed | Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature |
| title_short | Preliminary mechanistic insights into the detection of ethanol vapour using MnO2 NRs-CNPs-poly-4-(vinylpyridine) based solid-state sensor operating at room temperature |
| title_sort | preliminary mechanistic insights into the detection of ethanol vapour using mno2 nrs cnps poly 4 vinylpyridine based solid state sensor operating at room temperature |
| topic | Ethanol Solid-state sensor MnO2 NRs Polymer composites Semiconductor metal oxide |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024170247 |
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