纳米碳纤维表面四氧化三铁磁性修饰  

Ferroferric Oxide Modification of Surface of Carbon Nanofibers

作　　者：周文[1] 郝春成[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2015年第4期392-397,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51077075)

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24h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。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 Fe304 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 ℃, rn（CNFs-COOH） . m（Fe304） =5 ： 1,the best modification effect would be obtained.

关 键 词：纳米碳纤维 FE3O4 化学共沉淀法 磁性修饰 

分 类 号：TQ342.742[化学工程—化纤工业] TB332[一般工业技术—材料科学与工程]