Evaluating Different TiO 2 Nanoflower-Based Composites for Humidity Detection

• Published in: Sensors (Basel, Switzerland) Switzerland), 2022-08, Vol.22 (15)
• Main Authors: Mohamed Zahidi, Musa, Mamat, Mohamad Hafiz, Malek, Mohd Firdaus, Yaakob, Muhamad Kamil, Ahmad, Mohd Khairul, Abu Bakar, Suriani, Mohamed, Azmi, A Subki, A Shamsul Rahimi, Mahmood, Mohamad Rusop
• Format: Article
• Language: English
• ISSN: 1424-8220

Unique three-dimensional (3D) titanium dioxide (TiO ) nanoflowers (TFNA) have shown great potential for humidity sensing applications, due to their large surface area-to-volume ratio and high hydrophilicity. The formation of a composite with other materials could further enhance the performance of this material. In this work, the effect of different types of composites on the performance of a TNFA-based humidity sensor was examined. NiO, ZnO, rGO, and PVDF have been explored as possible composite pairing candidates with TiO nanoflowers, which were prepared via a modified solution immersion method. The properties of the composites were examined using field emission electron spectroscopy (FESEM), X-ray diffractometry (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), current-voltage (I-V) analysis, Hall effect measurement, and contact angle measurement. The performance of the humidity sensor was assessed using a humidity sensor measurement system inside a humidity-controlled chamber. Based on the result, the combination of TiO with rGO produced the highest sensor response at 39,590%. The achievement is attributed to the increase in the electrical conductivity, hydrophilicity, and specific surface area of the composite.