Preparation and Catalytic Property of Single Crystal Multiporousα-Fe_2O_3 Nanorods

Theα-FeOOH nanorods were prepared via hydrothermal reaction of Fe(NO_3)_3·9H_2O and KOH at 100℃for 6h.Then theα-FeOOH nanords were heat treated at different temperautres,and single crystalline and multiporousα-Fe_2O_3 nanorods were obtained.The phase and morphology of the samples were characterized by XRD and TEM.The heat treatment process was investigated by TGA and FT-IR.The results show that the phase transition ofα-FeOOH→α-Fe_2O_3 occurrs between 239℃and 259.1℃.Theα-Fe_2O_3 still keeps in rod shape and lots of holes appear on the surface which disappear with the temperature increasing.The catalytic performance ofα-Fe_2O_3 nanorods was studied by decomposition of ammonium perchlorate(AP) based on DTA.The higher-temperature of exothermic peak of AP shifts towards low temperature whenα-Fe_2O_3 nanorods are introduced into the reaction, and the largest decrement reaches 71.4℃for theα-Fe_2O_3 nanorods heat treated at 350℃.