A facile nanocasting synthesis of mesoporous Ag-doped SnO2 nanostructures with enhanced humidity sensing performance

- Mesoporous Ag/SnO2 based sensor was synthesized using nanocasting strategy.
- Mesoporous SnO2 shows 7.5-fold higher sensitivity than conventional SnO2.
- Ag/SnO2 displays fast response (4 s) and recovery time (6.5 s).
- The nanocasted sensor, Ag/SnO2, shows very high selectivity towards %RH.