Abstract C/ZnO composites with increased electromagnetic (EM) wave absorbing features have been synthesized through a simple one-pot hydrothermal process and subsequent high temperature carbonization under the protection of argon. The results depict that the maximum absorption of C/ZnO composites synthesized with the optimal molar ratio of zinc acetate to glucose is −50.43 dB at 15.77 GHz. The 1.16-mm-thick coating shows a wide effective absorption bandwidth (3.52 GHz) of EM wave (RL≤−10 dB). The thin coating thickness of the C/ZnO composites is desirable for decreasing the absorber weight in EM wave absorption. And there are no other reagents used throughout the synthesis process except for the green glucose and zinc acetate. Thus, C/ZnO composites would be highly promising lightweight EM wave absorbing materials.

中文翻译：

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具有强电磁波吸收的薄涂层 C/ZnO 复合材料的简便合成

摘要 通过简单的一锅水热法和随后在氩气保护下的高温碳化合成了具有增强的电磁 (EM) 波吸收特性的 C/ZnO 复合材料。结果表明，在 15.77 GHz 下，以乙酸锌与葡萄糖的最佳摩尔比合成的 C/ZnO 复合材料的最大吸收为 -50.43 dB。1.16 毫米厚的涂层显示出很宽的 EM 波有效吸收带宽 (3.52 GHz) (RL≤-10 dB)。C/ZnO 复合材料的薄涂层厚度有利于降低电磁波吸收中的吸收剂重量。除了绿色葡萄糖和醋酸锌外，整个合成过程中没有使用其他试剂。因此，C/ZnO 复合材料将是非常有前途的轻质电磁波吸收材料。