Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air
Hydrogen is a valuable fuel for the next energy scenario. Unfortunately, hydrogen is highly flammable at concentrations higher than 4% in air. This aspect makes the monitoring of H2 leaks an essential issue for safety reasons, especially in the transportation field. In this paper, nanocomposites bas...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2012-09-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/12/9/12361 |
| _version_ | 1811186136662409216 |
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| author | Stefano Trocino Andrea Donato Mariangela Latino Nicola Donato Salvatore Gianluca Leonardi Giovanni Neri |
| author_facet | Stefano Trocino Andrea Donato Mariangela Latino Nicola Donato Salvatore Gianluca Leonardi Giovanni Neri |
| author_sort | Stefano Trocino |
| collection | DOAJ |
| description | Hydrogen is a valuable fuel for the next energy scenario. Unfortunately, hydrogen is highly flammable at concentrations higher than 4% in air. This aspect makes the monitoring of H2 leaks an essential issue for safety reasons, especially in the transportation field. In this paper, nanocomposites based on Pt-doped TiO2/multiwalled carbon nanotubes (MWCNTs) have been introduced as sensitive materials for H2 at low temperatures. Pt-TiO2/MWNTs nanocomposites with different composition have been prepared by a simple wet chemical procedure and their morphological, microstructural and electrical properties were investigated. Resistive thick-film devices have been fabricated printing the hybrid nanocomposites on alumina substrates provided with Pt interdigitated electrodes. Electrical tests in air have shown that embedding MWCNTs in the TiO2 matrix modify markedly the electrical conductivity, providing a means to decrease the resistance of the sensing layer. Pt acts as a catalytic additive. Pt-TiO2/MWNTs-based sensors were found to be sensitive to hydrogen at concentrations between 0.5 and 3% in air, satisfying the requisites for practical applications in hydrogen leak detection devices. |
| first_indexed | 2024-04-11T13:41:51Z |
| format | Article |
| id | doaj.art-3e97b5de34764dd68a3300a62a80663d |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:41:51Z |
| publishDate | 2012-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-3e97b5de34764dd68a3300a62a80663d2022-12-22T04:21:14ZengMDPI AGSensors1424-82202012-09-01129123611237310.3390/s120912361Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in AirStefano TrocinoAndrea DonatoMariangela LatinoNicola DonatoSalvatore Gianluca LeonardiGiovanni NeriHydrogen is a valuable fuel for the next energy scenario. Unfortunately, hydrogen is highly flammable at concentrations higher than 4% in air. This aspect makes the monitoring of H2 leaks an essential issue for safety reasons, especially in the transportation field. In this paper, nanocomposites based on Pt-doped TiO2/multiwalled carbon nanotubes (MWCNTs) have been introduced as sensitive materials for H2 at low temperatures. Pt-TiO2/MWNTs nanocomposites with different composition have been prepared by a simple wet chemical procedure and their morphological, microstructural and electrical properties were investigated. Resistive thick-film devices have been fabricated printing the hybrid nanocomposites on alumina substrates provided with Pt interdigitated electrodes. Electrical tests in air have shown that embedding MWCNTs in the TiO2 matrix modify markedly the electrical conductivity, providing a means to decrease the resistance of the sensing layer. Pt acts as a catalytic additive. Pt-TiO2/MWNTs-based sensors were found to be sensitive to hydrogen at concentrations between 0.5 and 3% in air, satisfying the requisites for practical applications in hydrogen leak detection devices.http://www.mdpi.com/1424-8220/12/9/12361hydrogen sensorTiO2MWCNTshybrid nanocomposites |
| spellingShingle | Stefano Trocino Andrea Donato Mariangela Latino Nicola Donato Salvatore Gianluca Leonardi Giovanni Neri Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air Sensors hydrogen sensor TiO2 MWCNTs hybrid nanocomposites |
| title | Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air |
| title_full | Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air |
| title_fullStr | Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air |
| title_full_unstemmed | Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air |
| title_short | Pt-TiO2/MWCNTs Hybrid Composites for Monitoring Low Hydrogen Concentrations in Air |
| title_sort | pt tio2 mwcnts hybrid composites for monitoring low hydrogen concentrations in air |
| topic | hydrogen sensor TiO2 MWCNTs hybrid nanocomposites |
| url | http://www.mdpi.com/1424-8220/12/9/12361 |
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