【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。更多还原

【Abstract】 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 in3.90-18 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.更多还原