Synthesis of ZnO Nanorod/TiO2 Nanotube and its Application as a Resistive Gas Sensor

Marwa Abdul Muhsien Hassan, Nazar Khalaf Mahan

Abstract

In this study, different chemical methods were used to synthesize ZnO nanorod, TiO2 nanotube and ZnO/TiO2 nanostructure as high sensitivity vapor sensor for ethanol. The surface topography of ZnO nanorod, TiO2 nanotube and ZnO/TiO2 was studied by using the scanning electron microscopy (SEM). The X-rays diffraction showed the appearance of (101) ZnO which has single crystalline with a hexagonal wurtzite while TiO2 has been crystallized in a tetragonal with the preferential orientation of the crystallinity with the prominent (111). The relation between resistance-time showed high sensitivity for ZnO/TiO2 and was found to be around 20-80% at different working temperature. ZnO/TiO2 sensor was the most sensitive to ethanol vapor.

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Nano Biomedicine and Engineering.

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