Carbon-based nanomaterials in gas sensing applications

Carbon nanomaterials have gained significant attention for numerous applications. Their outstanding physical and chemical properties have triggered substantial research to evaluate their potential as gas sensing materials. Herein, we present an overview discussing the recent progress in the utilization of carbon nanomaterials and their composites in gas sensing devices. The sensing mechanism, design, and preparation techniques of such sensors are introduced. The modification of the carbon-based nanostructure with other nanomaterials and its effect on the sensing performance is also discussed. Finally, the existing challenges facing the practical application are presented, together with some possible improvement opportunities for future work.