基于改性石墨烯的化学阻抗型气体传感器研究进展

Graphene is an ideal material for gas sensors due to two-dimensional structure and excellent electrical properties. In particular, graphene-based gas sensors can detect gas molecules at room temperature. Modifications of graphene, such as the introduction of defects and heteroatom doping, can improve the sensitivity, detection limit, and selectivity of the sensor. This review firstly introduced the mechanism of graphene-based chemi-resistive gas sensors; then summarized the theoretical and experimental research of modified graphene in the application of gas sensor; finally, the development direction in the future was prospected.