Abstract Rational microstructure design of carbon based composites is becoming a promising method to reinforce their electromagnetic (EM) wave absorption performance, but their synthesis remains a challenge. Herein, we have reported a design of small-size Ni2P grown on carbon nanotubes (CNTs) as lightweight and high efficiency EM wave absorber. The Ni2P NPs can be uniformly grown on CNTs by controlling the nucleation and growth rate of Ni2P during the synthesis. The size and coverage of Ni2P on CNTs can be tuned by adjusting the reaction conditions with a high yield, which is large favorable for adjusting their application performance. The Ni2P/CNTs sample with low filler loading (30 wt%) in the paraffin wax exhibits a good wave absorption performance with the minimum reflection loss (RL mini) value of −51.8 dB at 5.28 GHz. Moreover, it shows a good EM wave absorption ability even at the thinnest thickness of 2 mm (−46.1 dB), and an effective absorption bandwidth of 11.68 GHz is achieved when the absorber thickness is in the range of 1.5–5 mm. The excellent EM wave absorbing performance makes the Ni2P/CNTs as a promising new microwave absorbing material in sustainable filed.

中文翻译：

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涂覆在碳纳米管上的 Ni2P 纳米晶体作为增强的轻质电磁波吸收剂

摘要 碳基复合材料的合理微观结构设计正成为增强其电磁（EM）波吸收性能的一种有前景的方法，但其合成仍然是一个挑战。在此，我们报道了一种在碳纳米管 (CNT) 上生长的小尺寸 Ni2P 作为轻质高效电磁波吸收器的设计。通过在合成过程中控制 Ni2P 的成核和生长速率，Ni2P NPs 可以在 CNT 上均匀生长。Ni2P 在碳纳米管上的尺寸和覆盖率可以通过调整反应条件来进行调整，从而获得较高的产率，这对调整其应用性能非常有利。石蜡中填充量低 (30 wt%) 的 Ni2P/CNTs 样品表现出良好的吸波性能，在 5.28 GHz 下的最小反射损耗 (RL mini) 值为 -51.8 dB。而且，即使在 2 毫米（-46.1 dB）的最薄厚度下，它也表现出良好的电磁波吸收能力，当吸收体厚度在 1.5-5 毫米范围内时，有效吸收带宽为 11.68 GHz。优异的电磁波吸收性能使 Ni2P/CNTs 成为一种有前途的新型可持续微波吸收材料。