Investigation on TiO2/graphene as resistance-based gas sensor for volatile organic compound gases detection

Abstract

Volatile organic compound (VOC) gases are usually produced from industrial activities. Short-term exposure to VOC gases can cause dizziness, headaches, nausea, and throat irritation. Years to a long time exposure to VOC gases can cause cancer and system damage in the human body. With the growth of gas sensor technology, a resistance-based gas sensor based on various structures of resistance-based gas sensors using Titanium dioxide/graphene (TiO₂/graphene) were investigated as a sensing material for detecting volatile organic compound gases, which are acetone and ethanol. The TiO₂/graphene gas sensor was deposited on a Kapton film using a screen printing technique. All TiO₂/graphene gas sensors were exposed to acetone and ethanol at room operating temperature. The results revealed that the highest response values to acetone and ethanol were produced by T99_G1_2 and T98_G2_1, respectively. It can be concluded that design 1 generated the most consistent response to acetone, while design 2 generated the most consistent response to ethanol.