Novel Mixed-Phase α/γ-Fe2O3 Micro-Flower Assembled with Nanosheets for Enhancing Acetone Detection

Although individual γ-Fe2O3 and α-Fe2O3 have been widely fabricated for gas sensors, their mixed phase of α/γ-Fe2O3 might deliver excellent sensing properties. In this study, a facile solvothermal method was used to fabricate Fe-alkoxide. After thermal treatment, it converted into γ-Fe2O3, mixed-phase with nanosheets-assembled flower-like structure. We studied the influence calcination temperature on properties acetone detection. The which annealed at 400 °C included 18% exhibited performance towards compared that α-Fe2O3. It showed response 353 concentration 200 ppm, low limit detection 0.5 ppm 160 °C. addition, change in responses from 50 shows good linear relationship. Moreover, material has reproducibility selectivity as well fast time 22 s recovery 14 ppm. Therefore, our possesses great prospects