物理化学学报

上一篇    下一篇

Co/rGO层结构调控增强阻抗匹配与介电损耗以实现高效电磁波吸收

董佳蕾1, 柏吉兴1, 杨柳2, 张海燕1, 齐俊博1, 郑赛那3, 王越4, 张会岩1, 曹祺1   

  1. 1 东南大学能源与环境学院, 能源热转换及其过程测控教育部重点实验室, 环境功能高分子江苏省高校重点实验室, 江苏 南京 210096;
    2 哈尔滨工程大学材料科学与化学工程学院, 黑龙江 哈尔滨 150001;
    3 东南大学土木工程学院, 江苏 南京 211189;
    4 湖北汽车工业学院汽车材料学院, 湖北 十堰 442002
  • 收稿日期:2026-06-01 修回日期:2026-08-03 录用日期:2026-08-11
  • 通讯作者: 曹祺 E-mail:qicao@seu.edu.cn
  • 基金资助:
    本研究受到国家自然科学基金(52576196，72574040)、国家级大学生创新创业训练计划(202510286020，202610286015)以及中国核动力研究设计院(HDLCXZX-2023-HD-011)资助。科学指南针(www.shiyanjia.com)协助完成了SEM、XPS和BET分析。

Layer engineering of Co/rGO enables enhanced impedance matching and dielectric loss for efficient electromagnetic wave absorption

Jialei Dong1, Jixing Bai1, Liu Yang2, Haiyan Zhang1, Junbo Qi1, Saina Zheng3, Yue Wang4, Huiyan Zhang1, Qi Cao1   

  1. 1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Key Laboratory of Functional Polymers for Sustainability of Jiangsu Province, School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu Province, China;
    2 College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang Province, China;
    3 Department of Construction and Real Estate, School of Civil Engineering, Southeast University, Nanjing 211189, Jiangsu Province, China;
    4 School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China
  • Received:2026-06-01 Revised:2026-08-03 Accepted:2026-08-11
  • Contact: Qi Cao E-mail:qicao@seu.edu.cn

PDF

39

赞

补充材料

1

摘要： 层结构调控被广泛应用于二维材料中以实现材料性能的调控。氧化石墨烯(Graphene Oxide, GO)纳米片作为碳基载体，在电磁波吸收领域具有多种优势，包括高比表面积、可调电导率以及丰富的极性官能团等。然而，目前对GO基复合吸收剂的微观层数调控，及其影响电磁波衰减性能的内在机制仍缺乏详细研究与解释。本研究通过超声辅助煅烧实现层结构调控，将ZIF-67/GO转化为Co/rGO复合材料，并探究GO层数对复合材料电磁波吸收性能的影响。在优化的Co/rGO复合材料中，少层rGO构建了更完善的导电网络、均匀分散的Co纳米颗粒引入了磁损耗并有助于实现良好的阻抗匹配。因此，该样品表现出显著的吸收性能，其最小反射损耗达−49.86 dB，有效吸收带宽达5.35 GHz。在进一步进行杂原子掺杂后，Co/rGO复合材料的吸收效率可提升至99.9999%以上(−68.02 dB)，能够有效地将高反射目标的电磁波信号降低至背景噪声水平。本研究证实了层工程策略在调节材料电磁性能方面的有效性，有望进一步提升碳基复合材料的吸波性能以实现高效宽频电磁波吸收。

关键词: 还原氧化石墨烯, 层工程, 微波吸收, 介电损耗, 阻抗匹配

Abstract: Layer engineering is widely applied in two-dimensional materials to achieve tunable and optimal properties. Graphene oxide (GO) nanosheets, as carbon-based carriers, offer various advantages for electromagnetic wave (EMW) absorption, including high specific surface area, tunable conductivity, and abundant polar functional groups. Nevertheless, the regulation of layer numbers of GO-based composite absorbents, and comprehensive understanding of the underlying mechanisms influencing the EMW absorption properties remain insufficient. This study converts ZIF-67/GO into Co/rGO composites, and employs the layer engineering via ultrasonic-assisted calcination, to investigate the influences of GO layer numbers on the material’s EMW absorption performance. In the optimized Co/rGO, few-layer GO forms a better conductive network, while the well-dispersed Co nanoparticles introduce magnetic loss and assist in achieving impedance matching. As a result, this sample delivers considerable absorption performance, with a minimum reflection loss of -49.86 dB and an effective absorption bandwidth of 5.35 GHz. Following additional heteroatom doping, the Co/rGO composite could further achieve an absorption efficiency of above 99.9999% (-68.02 dB), which efficiently reduce EMW signals from highly reflective targets to background noise level. This study confirms the effectiveness of layer engineering in regulating electromagnetic properties and thereby enhance the absorption performance of carbon-based composites to achieve strong and broadband EMW absorption.

Key words: Reduced graphene oxide (rGO), Layer engineering, Microwave absorption, Dielectric loss, Impedance matching