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.广西科学基金资助项目(桂青科0991015);广西大学有色金属及材料加工新技术教育部重点实验室开放基金资助项目(GXKFJ-18);广西教育厅项目(200808MS083);广西民族大学科研基金资助项目(2008QD020