纳米碳纤维表面四氧化三铁磁性修饰

PDF全文下载：2015040392

周文，  郝春成*

（青岛科技大学 材料科学与工程学院，山东 青岛 266042）

 摘要:以纳米铜为催化剂用化学气相沉积法(CVD)制备出直线型纳米碳纤维(CNFs)，然后在一定的温度下采用强酸对其进行处理，使其表面官能团化以获取官能化的纳米碳纤维(CNFsCOOH)。最后用共沉淀法，即将CNFsCOOH、Fe2+和Fe3+按一定的比例分散到水溶液中，经过24 h浸泡后在一定温度下用氨水调节溶液pH，从而在CNFs表面修饰上一层磁性纳米Fe3O4粒子。采用扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)和X射线衍射仪(XRD)等对CNFs的磁性修饰进行表征和分析。实验结果表明，通过化学共沉淀法能够在CNFs表面修饰上纳米Fe3O4，且当CNFs酸处理温度为110 ℃，m（CNFsCOOH）∶m(Fe3O4)=5∶1时修饰效果最佳。

关键词:  纳米碳纤维； Fe3O4； 化学共沉淀法； 磁性修饰

中图分类号： TQ 127.1+1；TB 332            文献标志码：  A

 Ferroferric Oxide  Modification of Surface of Carbon Nanofibers

 ZHOU Wen, HAO Chuncheng

(College of Materials Science and Engineering， Qingdao University of Science and Technology，Qingdao 266042，China)

Abstract: Straight carbon nanofibers (CNFs) were prepared with nanocopper being  catalyst by chemical vapor deposition (CVD).And  CNFs were disposed in concentrated nitric acid under certain temperature to obtain CNFsCOOH. Finally, the surface of carbon nanofibers (CNFs) were modified with Fe3O4 magnetic nanoparticles uniformly by the chemical coprecipitation, that was, the CNFsCOOH, Fe2+ and Fe3+ were dispersed  in aqueous solution according to certain proportion soaking 24 h and adjusting the pH with ammonia under certain temperature. The modification effect of CNFs was analyzed by fieldemission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and Xray diffraction (XRD). The results showed that the surface of CNFs were evenly modified with Fe3O4 magnetic nanoparticles. Moreover, when the temperature of concentrated nitric acid was 110 ℃, m（CNFsCOOH）∶m(Fe3O4)=5∶1，the best modification effect would be obtained.

Key words: carbon nanofiber; Fe3O4; chemical coprecipitation method; magnetic modification

收稿日期： 20140520

基金项目： 国家自然科学基金资助项目(51077075).

作者简介： 周文(1987—)，男，硕士研究生.              *通信联系人.

文章编号：16726987（2015）04039206； DOI： 10.16351/j.16726987.2015.04.008