Facile Synthesis of Hierarchical Tin Oxide Nanoflowers with Ultra-High Methanol Gas Sensing at Low Working Temperature

Table 1 Comparison of methanol gas sensors based on tin oxide materials with different morphologies

Gas sensor	Operating temperature, °C	Methanol concentration, ppm	Sensitivity value	Reference
HTONF	200	100	58	This work
SnO₂ hierarchical porous nanosheets	275	100	3	[32]
Rolled-up SnO₂ nanomembranes	220	10	2	[33]
Hollow SnO₂ microfiber	270	100	10	[34]
Honeycomb-like SnO₂	320	100	18	[35]