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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。
Fe / SnO2 nanoparticles were synthesized by sol-gel and hydrogen reduction. Through the method of catalytic cracking of acetylene, carbon nanofibers with high yield and high selectivity can be synthesized on the surface of the nanoparticles. Studies have shown that temperature has a great influence on the yield, size and microstructure of the synthesized carbon nanofibers. Ultrahigh yields of carbon nanofibers were obtained (278 and 445), and the synthesized carbon nanofiber materials showed better microwave absorption properties. At 15.29 GHz, the sample has the lowest reflection loss with a value of about -7.28 dB and a reflection loss of less than -5 dB over a range of 3.90 to 18 GHz. Therefore, a simple and environmentally friendly carbon nanofiber ultra-high yield synthesis route is proposed, which is beneficial to the widespread use of this material.