- Turkish Journal of Chemistry
- Vol: 45 Issue: 2
- Enhanced ethanol sensing properties of WO3 modified TiO2 nanorods
Enhanced ethanol sensing properties of WO3 modified TiO2 nanorods
Authors : Bekzat Abdikadyr, Alp Kilic, Onur Alev, Serkan Buyukkose, Zafer Ziya Ozturk
Pages : 295-306
View : 15 | Download : 6
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :Pristine and WO3 decorated TiO2 nanorods (NRs) were synthesised to investigate n-n-type heterojunction gas sensing properties. TiO2 NRs were fabricated via hydrothermal method on fluorine-doped tin oxide coated glass (FTO) substrates. Then, tungsten was sputtered on the TiO2 NRs and thermally oxidised to obtain WO3 nanoparticles. The heterostructure was characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy. Fabricated sensor devices were exposed to VOCs such as toluene, xylene, acetone and ethanol, and humidity at different operation temperatures. Experimental results demonstrated that the heterostructure has better sensor response toward ethanol at 200 degrees C. Enhanced sensing properties are attributed to the heterojunction formation by decorating TiO2 NRs with WO3.Keywords : WO3/TiO2, gas sensor, heterostructure, nanorods, ethanol