Enhanced NH_3 Sensing Performance of Ti_3C_2T_x Nanosheets Supported By TiO_2 Nanoparticles at Room Temperature

摘要

With the rapid development of the chemical industry, the emission of the harmful NH_3 has increased significantly, thus the research of high performance NH_3 sensors has attracted extensive attention of the researchers. Over the past decades, the emergence of novel materials has brought opportunities for the development of gas sensors. As a representative of another new family of materials, the 2D transition metal carbides, carbonitrides and nitrides (MXenes) have attracted great attention of the researchers in the field of gas sensors due to their unique chemical and physical properties being recently realized. Taking the well-studied Ti_3C_2T_x. MXene as an example, it has been proved theoretically and experimentally that the Ti_3C_2T_x has gas sensing properties at room temperature, especially for NH_3. However, its NH_3 sensing properties still need to be enhanced. In this work, the gas sensor based on TiO_2/Ti_3C_2T_x composite film is fabricated by a simple spraying method and its NH_3 sensing properties are investigated at room temperature.