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利用天然磁铁矿简易绿色合成磁性Fe3C@C纳米材料
古桔文, 白 勇, 仇松柏*, 张 浅, 王铁军*
广东工业大学轻工化工学院,广州 510006
摘要:
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).
关键词:  磁性材料,天然铁矿石,Fe3C@C,柠檬酸络合
DOI:10.1063/1674-0068/cjcp1907142
分类号:
基金项目:
Facile Green Synthesis of Magnetic Fe3C@C Nanocomposite using Natural Magnetite
Ju-wen Gu, Yong Bai, Song-bai Qiu*, Qian Zhang, Tie-jun Wang*
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
Abstract:
One simple and environmental friendly synthesis strategy for preparing low-cost magnetic Fe3C@C materials has been facilely developed using a modi ed sol-gel approach, wherein natural magnetite acted as the iron source. A chelating polycarboxylic acid such as citric acid (CA) was employed as the carbon source, and it dissolved Fe very effectively, Fe3O4 and natural magnetite to composite an iron-citrate complex with the assistance of ammonium hy-droxide. 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, catalysis, etc.
Key words:  Magnetic material, Natural magnetite, Fe3C@C, Citric acid complexation
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