Synthesis and Characterization of TiO<sub>2</sub> Nanotubes for High-Performance Gas Sensor Applications
In this study, we investigated the fabrication, properties, and sensing applications of TiO<sub>2</sub> nanotubes. A pure titanium metal sheet was used to demonstrate how titanium dioxide nanotubes can be used for gas-sensing applications through the electrochemical anodization method. S...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-10-01
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| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/14/11/928 |
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| Summary: | In this study, we investigated the fabrication, properties, and sensing applications of TiO<sub>2</sub> nanotubes. A pure titanium metal sheet was used to demonstrate how titanium dioxide nanotubes can be used for gas-sensing applications through the electrochemical anodization method. Subsequently, X-ray diffraction indicated the crystallization of the titanium dioxide layer. Scanning electron microscopy and transmission electron microscopy then revealed the average diameter of the TiO<sub>2</sub> nanotubes to be approximately 100 nm, with tube lengths ranging between 3 and 9 µm and the thickness of the nanotube walls being about 25 nm. This type of TiO<sub>2</sub> nanotube was found to be suitable for NO<sub>2</sub> gas sensor applications. With an oxidation time of 15 min, its detection of NO<sub>2</sub> gas showed a good result at 250 °C, especially when exposed to a NO<sub>2</sub> gas flow of 100 ppm, where a maximum NO<sub>2</sub> gas response of 96% was obtained. The NO<sub>2</sub> sensors based on the TiO<sub>2</sub> nanotube arrays all exhibited a high level of stability, good reproducibility, and high sensitivity. |
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| ISSN: | 2073-4352 |