无机材料学报 ›› 2010, Vol. 25 ›› Issue (5): 457-462.DOI: 10.3724/SP.J.1077.2010.00457 CSTR: 32189.14.SP.J.1077.2010.00457

• 研究论文 • 上一篇    下一篇

多孔C/Fe纳米复合材料的制备及表征

曹 斌, 刘庆雷, 张 荻   

  1. 上海交通大学 金属基复合材料国家重点实验室, 上海 200240
  • 收稿日期:2009-10-29 修回日期:2009-12-14 出版日期:2010-05-20 网络出版日期:2010-05-12

Synthesis and Characterization of Porous Carbon/Fe Nanocomposite

CAO   Bin, LIU  Qing-Lei, ZHANG   Di   

  1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2009-10-29 Revised:2009-12-14 Published:2010-05-20 Online:2010-05-12

摘要:

以商业活性炭为原料, 采用真空浸渍法结合高温真空热处理工艺, 制备出多孔C/Fe纳米复合材料. 实验采用氮气吸附法测量了C/Fe纳米复合材料的比表面积和孔径分布, 并利用XRD和TEM表征了其结构和形貌. 实验结果显示:C/Fe纳米复合材料的比表面积为450~650m2/g, 并保留了活性炭介孔尺度的多孔结构特性. C/Fe纳米复合材料由非晶碳、碳纳米带以及铁纳米粒子构成, 纳米铁颗粒均匀分布在非晶碳基体中, 石墨化的碳纳米带包裹纳米铁颗粒并向外伸展相互连接, 形成碳纳米网络结构. 并就反应过程以及过渡金属对非晶碳石墨化的催化机理进行了探讨.

关键词: 活性炭, 碳纳米带, 催化石墨化, 纳米复合材料

Abstract:

Porous carbon/Fe nanocomposite was produced by vacuum impregnation method and following heattreatment process using activated carbon as the raw material. The surface area (BET) and the pore size distribution of the nanocomposite were measured through nitrogen adsorption method at 77K. X-ray diffraction (XRD) and transmission electron microscope (TEM) were used to characterize the microstructure and morphology. Surface area of the C/Fe nanocomposite is 450-650m2/g, and the composite also has a similar pore size distribution to activated carbon in mesoporous range. The C/Fe nanocomposite is composed of amorphous carbon, graphene nanoribbons and Fe nanoparticles. Fe nanoparticles that are encapsulated by graphitic layers distribute uniformly inside the amorphous carbon matrix. The graphene nanoribbons extend throughout the amorphous carbon matrix and interconnect each other to form a graphene nanoribbon network. Reaction process is investigated by a thermo gravimetric analysis (TGA) method, and the growth mechanism of carbon nanoribbons is also discussed.

Key words: activated carbon, carbon nanoribbons, catalytic graphitization, nanocomposite materials

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