It is generally known that iron oxides mainly contain Fe2O3 and Fe3O4. Fe2O3 is stable in air, and possesses potential applications in adsorption, sensors, electrochemical catalysis, and other fields. On the other hand, Fe3O4 is a typical kind of magnetic material, which can be applied in magnetofluid as well as magnetic recording materials. Fe2O3 nanofibers with uniform structure can be easily prepared via an electrospinning technique followed by a calcination treatment (Fig. 3.6A). For example, Gao et al. prepared hollow a-Fe2O3 nanofibers via such a strategy and developed their potential in dye adsorption. Similarly, Nalbandian et al. found that electrospun Fe2O3 nanofibers possess promising prospects in heavy metal removal. Guo et al. studied the effect of the structure of electrospun Fe2O3 nanotubes on gas sensing; the results indicated that porous a-Fe2O3 nanotubes exhibited remarkably enhanced performance for acetone sensing over hollow a-Fe2O3 nanotubes. g-Fe2O3 nanofibers have also been successfully synthesized and their properties as acetone gas sensors have been found as well.
没有评论:
发表评论