煅烧工艺对α-Fe_2O_3磁性纳米纤维形貌及性能的影响研究

Study on the effects of calcination process on the morphology and property of α-Fe_2O_3 magnetic nanofibers

结合静电纺丝和水热合成技术制备PVA/Fe3O4 磁性纳米纤维,空气气氛中在不同煅烧温度下制备出一系列α-Fe2O3 纳米纤维.采用扫描电子显微镜（SEM）,X射线衍射仪和超导量子干涉仪对不同煅烧温度下制得的α-Fe2O3 磁性纳米纤维进行形貌与性能表征.结果表明,PVA/Fe3O4 复合磁性纳米纤维在600-800℃的煅烧温度区间内可获得稳定的α-Fe2O3磁性纳米纤维,纤维形貌从中空管状结构逐渐转变为沟槽状结构,纤维中的α-Fe2O3 粒子具有不同的晶粒尺寸,结晶随温度升高而变好,且具有不同的磁性能.制备的α-Fe2O3 磁性纳米纤维在水处理等方面具有潜在应用.

PVA/Fe_3O_4 magnetic nanofiber was successfully prepared via electrospinning and hydrothermal synthesis.The as-prepared PVA/Fe_3O_4 magnetic nanofiber was calcined in a tube furnace under air atmosphere to achieve a series ofα-Fe_2O_3 magnetic nanofibers.Scanning electron microscopy(SEM),X-ray diffraction(XRD)and superconducting quantum interference device(SQUID)were employed to characterizeα-Fe_2O_3 magnetic nanofibers.The results indicated thatα-Fe_2O_3 magnetic nanofiber can be obtained via calcinations of PVA/Fe_3O_4 magnetic nanofibers from 600-800 ℃.The hollow tubular structure turned gradually into groove-like structure as the calcinations temperature increased.α-Fe_2O_3 nanoparticles in the nanofiber had different grain size as well as magnetic property,and its crystallization got better with the increase of temperature.The resultantα-Fe_2O_3 magnetic nanofibers possess potential application in water treatment.