Graphene and graphene oxide double decorated SnO2 nanofibers with enhanced humidity sensing performance

Abstract

We demonstrate humidity sensing with SnO₂@G–GO nanocomposites using three important parameters for a sensing device: sensitivity, response and recovery time, and stability. Here, the SnO₂@G–GO nanocomposites were fabricated by classical electrospinning and solution evaporation. The as-prepared SnO₂@G–GO sensor demonstrated very high sensitivity (up to 32 MΩ/% RH), fast response and recovery time (less than 1 s), and good stability. Pure SnO₂ and SnO₂@G hybrid NFs were prepared as reference materials for humidity sensing. And they showed low sensitivity and slow response to humid air. The performance for the incorporation of graphene and graphene oxide with SnO₂ to greatly improve the humidity sensing properties were discussed in detail.