Azhar, Najwa Ezira Ahmed and Jafar, Salifairus Mohammad and Sulimai, Nurul Hidah and Malek, Mohamad Firdaus and Mamat, Mohamad Hafiz and Shariffudin, Shafinaz Sobihana and Mohammad, Maryam and Eswar, Kevin Alvin and Ahmad Shuhaimi, Abu Bakar and Alrokayan, Salman A. H. and Khan, Haseeb A. and Rusop, M. (2022) Influence of anatase titanium dioxide nanotube arrays on humidity sensor synthesized by electrochemical anodization. Jurnal Teknologi, 84 (6-2). 43 -52. ISSN 01279696, DOI https://doi.org/10.11113/jurnalteknologi.v84.19329.
Full text not available from this repository.Abstract
Humidity sensors have become increasingly important and widely used to improve the quality of life and industrial processes. Over the past decades, titanium dioxide (TiO2) has received wide attention in many promising areas such as sensors, solar cells, and photocatalytic. However, TiO2 required high operating conditions such as high temperatures to examine the crystalline stability phase. This study focuses on highly ordered titanium dioxide nanotube arrays (TiO2 NTAs) film synthesized using the electrochemical anodization method. Annealing temperature effect on the fabricated TiO2 NTAs was investigated. An electrolyte solution was prepared by mixing ammonium fluoride (0.3 wt) and ethylene glycol (25 ml) with deionized water (2 vol). Titanium (Ti) sheet was anodized at 35 V for 120 minutes. The films were annealed from 350 °C to 550 °C. FESEM images showed the diameter size of TiO2 NTAs film decreases as the annealing temperatures increases. Results had also shown that the average diameter annealed at 450 °C was around ~50.82 nm while the XRD pattern demonstrated TiO2 NTAs exhibiting an anatase phase with a prominent (101) peak recorded for the sample prepared at 450 °C with a high crystallite size of 29.17 nm. The calculated optical band gap annealed at 450 °C (3.24 eV) is comparable with other literature. The current-voltage characteristic of TiO2 NTAs film reported a high current for 450 °C (1.12 x 10-5 A) with a conductivity of 0.048 S.cm-1 and high sensitivity (287.72). © 2022 Penerbit UTM Press.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, Malaysia, Universiti Teknologi MARA, Institute of Research Management and Innovation, Universiti Teknologi MARA, Mr. Mohd Azlan Jaafar, Mr Muhamad Faizal Abd Halim |
| Uncontrolled Keywords: | Annealing temperature; Electrochemical anodization; Humidity sensor; Physical properties; TiO2 NTAs |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 15 Aug 2025 04:05 |
| Last Modified: | 15 Aug 2025 04:05 |
| URI: | http://eprints.um.edu.my/id/eprint/43648 |
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