Mulberry-like heterostructure (Fe-O-Ti): a novel sensing material for ethanol gas sensors

The gas sensors have been widely used in various fields, to protect the safety of life and property. A novel heterostructure of Fe-O-Ti nanoparticles is fabricated by hydrothermal and wet chemical deposition methods. The Fe-O-Ti nanoparticles with a large number of pores possess high surface area, which is in favour of high-performance gas sensors. Compared with pure Fe₂O₃ and TiO₂, the Fe-O-Ti composite exhibits obviously enhanced sensing characteristics, such as faster response-recovery time (T _res = 6 s, T _rec = 48 s), higher sensing response (response = 35.6) and better selectivity. The results show that the special morphology and large specific surface area of mulberry-like Fe-O-Ti heterostructures provided a large contact area for gas reactions.