Bouktif, B.; Rashid, M.; Hajjaji, A.; Choubani, K.; Alrasheedi, N.H.; Louhichi, B.; Dimassi, W.; Ben Rabha, M. Synthesis and Characterization of TiO2 Nanotubes for High-Performance Gas Sensor Applications. Crystals2024, 14, 928.
Bouktif, B.; Rashid, M.; Hajjaji, A.; Choubani, K.; Alrasheedi, N.H.; Louhichi, B.; Dimassi, W.; Ben Rabha, M. Synthesis and Characterization of TiO2 Nanotubes for High-Performance Gas Sensor Applications. Crystals 2024, 14, 928.
Bouktif, B.; Rashid, M.; Hajjaji, A.; Choubani, K.; Alrasheedi, N.H.; Louhichi, B.; Dimassi, W.; Ben Rabha, M. Synthesis and Characterization of TiO2 Nanotubes for High-Performance Gas Sensor Applications. Crystals2024, 14, 928.
Bouktif, B.; Rashid, M.; Hajjaji, A.; Choubani, K.; Alrasheedi, N.H.; Louhichi, B.; Dimassi, W.; Ben Rabha, M. Synthesis and Characterization of TiO2 Nanotubes for High-Performance Gas Sensor Applications. Crystals 2024, 14, 928.
Abstract
This work investigated the fabrication, properties, and sensing applications of TiO2 nanotubes. A purity of 99.7% and 1mm thickness of titanium metal sheet was used to elaborate titanium dioxide nanotubes for gas sensor application through electrochemical anodization in a mixture of Ethylene glycol (EG)/NH4F electrolytes. As a result, X-ray diffraction indicates the crystallization of the titanium dioxide layer. Scanning electron microscopy and Transmission electron microscopy reveal that the average diameter of the TiO₂ nanotubes is approximately 100 nm, with tube length ranging between 3 and 9 microns and a thickness of the nanotube walls of about 25 nm. This type of TiO2 nanotube is suitable for NO2 gas sensor applications. As a result, at an oxidation time of 15 min, the detection of TiO2 nanotube gas toward NO2 gas shows a good result at 250 °C, when exposed to a NO2 gas flow of 100 ppm, where a maximum NO2 gas response of 96% was obtained. The sensors based on the TiO2 nanotube arrays for sensing NO2 all exhibited high stability, good reproducibility, and high sensitivity. This work suggests that TiO2 nanotubes are a promising material for application as a NO2 sensor, as well as other applications.
Keywords
Metal Oxides; Crystal Stracture; Titanium dioxide; Electrochemical; Nanotubes; Gas sensors
Subject
Environmental and Earth Sciences, Environmental Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
