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Facile green synthesis of magnetic Fe3C@C nanocomposite using natural magnetite
王铁军
Author NameAffiliationE-mail
王铁军 轻工化工学院广东工业大学广州 510006 wangtj@ms.giec.ac.cn 
Abstract:
One simple and environmental friendly synthesis strategy for preparing low-cost magnetic Fe3C@C materials has been facilely developed using a modified sol-gel approach, wherein natural magnetite acted as the iron source. A chelating polycarboxylic acid such as citric acid (CA) was employed as carbon source, and it very effectively dissolved Fe, Fe3O4 and natural magnetite to composite an iron-citrate complex with the assistance of ammonium hydroxide. The core-shell structure of the as-prepared nanocomposites was formed directly by high-temperature pyrolysis. The Fe3C@C materials exhibited superparamagnetic properties (38.09 emu/mg), suggesting potential applications in biomedicine, environment, absorption and catalysis.
Key words:  magnetic material  natural magnetite  Fe3C@C  citric acid complexation
FundProject:
利用天然磁铁矿简易绿色合成磁性Fe3C @ C纳米材料
王铁军
摘要:
本文采用改进的溶胶凝胶法,以天然磁铁矿为铁源,开发出一种制备过程简单且环境友好且低成本的磁性Fe3C @ C纳米材料制备策略。其中,柠檬酸作为多元羧酸络合剂,不但可以有效地溶解不同铁源例如Fe、Fe3O4或天然磁铁矿,形成柠檬酸铁盐络合物;还可以在热解过程中作为碳源,形成包裹碳层。通过控制高温热解过程可以直接形成特殊的核-壳结构形态。Fe3C @ C纳米材料具有超顺磁性特性(38.09 emu / mg),在生物医学、环境科学、吸收和催化等方面具有潜在的应用价值。
关键词:  磁性材料  天然铁矿石  Fe3C@C  柠檬酸络合
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