低温热解二茂铁制备碳包裹纳米铁及其结构

Fabrication and microstructure of carbon encapsulated iron nanoparticles via a low-temperature pyrolysis route

以二茂铁为碳源和铁源在100 mL不锈钢高压釜中经520℃直接热解制备碳包裹纳米铁。研究不同反应物量对热解产物的影响,并采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对热解产物的物相、形貌和结构进行分析。结果表明:二茂铁520℃热解碳产物以无定形炭和Fe3C相为主。当二茂铁的量为1 g时,热解产物是蜂窝状的多孔炭,热解产物的碳产率为0.18 g,无碳包裹纳米铁生成。当二茂铁量分别为2 g、3 g和4 g时,其形貌呈弯曲、螺旋状以及颗粒状等,热解产物中碳包裹纳米铁分别为0.38 g、0.62 g和0.95 g。

With ferrocene as a carbon source and an iron source,carbon encapsulated iron nanoparticles were synthesized in a 100 mL stainless steel autoclave.Effects of different reactants on the pyrolysis products were studied.X-ray diffractometer（XRD） and scanning electron microscope（SEM） were used to analyze the phases,morphology and microstucture of the pyrolysis products.The results showed that the yields of ferrocene pyrolysis at 520 ℃ were composed of amorphous carbon and Fe3C phase.With the content of 1g ferrocene the pyrolysis product was a beehive-like porous carbon without carbon nanotubes,and the yield of carbon was 0.18 g.When the contents of ferrocene were 2 g,3 g and 4 g,the morphologies were curve,spiral and granular,and the yields of carbon encapsulated iron nanoparticles were 0.38 g,0.62 g and 0.95 g,respectively.