Ionic liquid-assisted synthesis of α-Fe2O3 mesoporous nanorod arrays and their excellent trimethylamine gas-sensing properties for monitoring fish freshness

Mesoporous α-Fe₂O₃ nanorod arrays sensor, with appropriate amount of [C₁₂mim][Br] retention, exhibits excellent sensitivity to trimethylamine and good anti-humidity ability at 217 °C, which can be used in identification of fish freshness.