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首页> 外文期刊>Synthetic Metals >Enhanced microwave absorption properties of N-doped graphene@PANI nanorod arrays hierarchical structures modified by Fe3O4 nanoclusters
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Enhanced microwave absorption properties of N-doped graphene@PANI nanorod arrays hierarchical structures modified by Fe3O4 nanoclusters

机译：Fe3O4纳米团簇修饰的N掺杂石墨烯@PANI纳米棒阵列分层结构的增强微波吸收性能

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摘要

The hierarchical structures of N-doped graphene (NG)@PANI nanorod arrays modified with Fe3O4 nanocluster have been fabricated by a hydrothermal reaction. The as-prepared (NG@PANI@Fe3O4) composites were characterized by XRD, Raman and FTIR spectra, VSM, XPS spectroscopy, TEM and FESEM. The results reveal that the surfaces of NG@PANI nanorod arrays are randomly covered by Fe3O4 nanocluster with an average size of about 40 nm. With Fe3O4 nanoclusters coated on the surfaces of NG@PANI nanorod arrays, the composites exhibit superparamagnetic characteristics at room temperature. Moreover, the microwave absorption properties of both NG@PANI nanorod arrays and NG@PANI@Fe3O4 nanocluster were investigated between 2 and 18 GHz microwave frequency bands. The electromagnetic data demonstrates that NG@PANI@Fe3O4 nanocluster composites exhibit significantly enhanced microwave absorption properties compared with graphene@Fe3O4, which probably originates from improved level of impedance matching and interfacial polarization. (C) 2014 Elsevier B.V. All rights reserved.
机译：通过水热反应制备了Fe3O4纳米团簇修饰的N掺杂石墨烯（PNG）@PANI纳米棒阵列的层级结构。通过XRD，拉曼和FTIR光谱，VSM，XPS光谱，TEM和FESEM表征所制备的（NG @ PANI @ Fe3O4）复合材料。结果表明，NG @ PANI纳米棒阵列的表面被Fe3O4纳米簇随机覆盖，平均粒径约为40 nm。在NG @ PANI纳米棒阵列的表面上涂覆Fe3O4纳米团簇后，复合材料在室温下表现出超顺磁特性。此外，还研究了NG @ PANI纳米棒阵列和NG @ PANI @ Fe3O4纳米簇的微波吸收特性。电磁数据表明，与石墨烯@ Fe3O4相比，NG @ PANI @ Fe3O4纳米簇复合材料显示出显着增强的微波吸收性能，这可能源于阻抗匹配和界面极化水平的提高。 （C）2014 Elsevier B.V.保留所有权利。

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