碳纳米纤维超高产合成及磁性和微波吸收性能(英文)  

Synthesis of Carbon Nanofibers in Ultrahigh Yield and Their Magnetic and Microwave Absorption Properties

作　　者：祁小四[1,2,3] 顼建乐 钟伟[2,3] 都有为[2,3] 

机构地区：[1]贵州大学理学院,贵阳550025 [2]南京大学固体微结构物理国家重点实验室,南京210093 [3]南京大学江苏省纳米技术重点实验室,南京210093

出　　处：《微纳电子技术》2015年第3期142-147,156,共7页Micronanoelectronic Technology

基　　金：National Science Foundation of China(11364005,11174132);Foundation of the National Key Project for Basic Research(2010CB923402,2011CB922102);International Cooperation Project of Guizhou Province(2012-7002);National Science Foundation of Guizhou Province(2014-2059)

摘　　要：利用溶胶凝胶和氢气还原的方法合成出Fe/SnO2纳米颗粒。通过催化裂解乙炔的方法,可在该纳米颗粒表面合成出高产率、高选择性的碳纳米纤维。研究表明温度对所合成碳纳米纤维的产率、尺寸和微结构有着很大的影响。获得了超高的碳纳米纤维的产率（278和445）,并且所合成的碳纳米纤维材料表现出较好的微波吸收性能。在15.29 GHz处,样品的反射损耗达到最小,其数值约为-7.28 dB,且可在3.90~18 GHz内获得低于-5 dB的反射损耗值。因此,提出了一个简单、环境友好的碳纳米纤维超高产合成路径,该路径有利于该材料的广泛使用。Over Fe/SnO2 nanoparticles generated by a combined sol-gel and hydrogen reduction method, the high selectivity of carbon nanofibers （CNFs） were synthesized in large quantities through the catalytic decomposition of acetylene. The studies demonstrate that the temperature has a great impact on the yield, dimension and microstructure of the as-synthesized CNFs. And the ultrahigh yields （278 and 445） of the CNFs were obtained. Moreover, the as-synthesized CNF mate-rial exhibits good microwave absorption properties. The minimum reflection loss （RL） of the obtained sample is about - 7.28 dB at 15.29 GHz, and the RL below - 5 dB can be obtained in 3.90 - 18 GHz. Therefore, a simple and environment-friendly route was proposed for the synthesis of the CNFs in ultrahigh yield. The route benefits a wide use of the material.

关 键 词：Fe/SnO2纳米颗粒 碳纳米纤维 化学气相沉积(CVD)法 超高产 反射损耗 微波吸收性能 

分 类 号：TB383[一般工业技术—材料科学与工程] O482.54[理学—固体物理]