Facile Fabrication of Pure α-Fe_2O_3 Nanoparticles via Forced Hydrolysis Using Microwave-Assisted Esterification and their Sensing Property

摘要

In this paper we firstly demonstrate a facile approach for the rapid fabrication of α-Fe_2O_3 using microwave-assisted esterification. In situ-generated water leads to the forced hydrolysis of Fe~(3+). Microwave irradiation greatly promotes the growth of α-Fe_2O_3 nanoparticles compared with conventional solvother-mal approach, and agitation can assure the obtainment of pure hematite phase. The akaganeite phase is preserved without stirring. The BET specific surface area reaches 83 m~2/g although high concentration of FeCl_3 is adopted. Our approach can assure the very rapid acquisition of hematite nanoparticles. Electrochemical studies indicate that our product can function as a candidate for high-performance sensor.