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Research Article | Open Access

Titania Nanotubes Arrays Based-Gas Sensor: NO2-Oxidizing Gas and H2-Reducing Gas

Ghufran Abd Al-Sajad1, Araa Mebdir Holi1( ), Asla Abdullah AL-Zahrani2, Asmaa Soheil Najm3
Department of Physics, College of Education, University of Al-Qadisiyah, Al-Diwaniyah, Al-Qadisiyah 58002, Iraq
Imam Abdulrahman-bin Fiasal University, Eastern Region, Dammam, Saudi Arabia
Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
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Abstract

Gas sensor based on titanium dioxide (TiO2) nanotube was manufactured and its sensitivity to hydrogen (H2) and to nitrogen dioxide (NO2) gasses was investigated using anodization method. The TiO2 NT structure was studied using X-ray diffraction (XRD). The surface morphology of prepared Titania was analysed using field-emission electron-scanning microscopy (FE-SEM). Starting with (XRD) study it confirms the tetragonal phase structure of the prepared Titania (anatase and rutile). In addition, the TiO2 anatase averaged crystallite size was 25.9 nm. The FE-SEM images revealed that the nanotube's average diameters are within 70 ± 2 nm. Gas response measurements at room temperature (27 ℃) for hydrogen and nitrogen dioxide gases at various concentrations (100, 150, 200, 250 and 300 ppm) were investigated. Our study has shown that the higher resistance of NO2 gas was 30 Ω at 300 ppm while it was equal 18.29 Ω at 150 ppm for H2 gas at room temperature.

Keywords

TitaniaGas sensorHydrogenNanotubeNitrogen dioxide

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Nano Biomedicine and Engineering
Volume 12 Issue 3,
September 2020
Pages 191-196
DOI: 10.5101/nbe.v12i3.p191-196
Cite this article:
Al-Sajad GA, Holi AM, AL-Zahrani AA, et al. Titania Nanotubes Arrays Based-Gas Sensor: NO2-Oxidizing Gas and H2-Reducing Gas. Nano Biomedicine and Engineering, 2020, 12(3): 191-196. https://doi.org/10.5101/nbe.v12i3.p191-196

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Received: 29 March 2020
Accepted: 06 June 2020
Published: 06 July 2020
© Ghufran Abd AL-Sajad, Araa Mebdir Holi, Asla Abdullah AL-Zahrani, and Asmaa Soheil Najm.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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