Enhanced gas sensing performance of amorphous Fe2O3 for triethylamine gas detection

Amorphous metal oxides offer unique advantages for gas sensing due to their disordered structures and abundant defects, yet their potential for Triethylamine (TEA) detection remains underexplored. This study investigates the gas sensing performance of amorphous and crystalline Fe 2 O 3 for TEA detection, aiming to explore the potential of amorphous Fe 2 O 3 as a superior alternative to traditional crystalline Metal Oxide Semiconductors (MOS). The structural and morphological characteristics of the samples were analyzed, revealing that amorphous Fe 2 O 3 possesses a higher specific surface area and a disordered structure with abundant oxygen vacancies. The gas sensing tests showed that the amorphous Fe 2 O 3 sensor exhibited higher sensitivity, selectivity, and faster response/recovery times compared to the crystalline Fe 2 O 3 sensor. These findings suggest that amorphous Fe 2 O 3 could be a promising material for developing highly sensitive, selective, and energy-efficient TEA gas sensors.