Investigation of Ammonia-Sensitive Properties of MXene/TiO₂/Nafion Composites at Room Temperature

Abstract Ammonia (NH 3 ) has been extensively explored in farm, food, and medical applications, therefore a highly responsive ammonia sensor is highly meaningful. The paper reports the successful fabrication of a new NH 3 sensor using MXene/TiO 2 /Nafion composites. The incorporation of Nafion, an ionic polymer, was also found to allow for the formation of a more stable sensor film by the ionic matrix. The composite material was then integrated with this matrix at a prespecified volume ratio. The responses of the sensors were investigated. When the volume ratio of MXene and TiO 2 is 1:1, the response and recovery time of the sensor is 33s and 110s, respectively, with a response rate of 98.08% at ambient temperature. A potentially useful material for NH 3 gas detection was offered in this study.