Pb single-atoms on nitrogen-doped graphene hollow spheres for electromagnetic wave absorption

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-04-22 DOI:10.1016/j.carbon.2025.120352

Yidan Sun , Yanan Shi , Xiao Zhang , Fenghui Cao , Letian Huang , Yujin Chen

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Abstract

Three-dimensional carbon-based materials have attracted significant interest due to their lightweight nature; however, controlling their morphology while maintaining lightweight characteristics when combined with other materials remains a major challenge in developing materials exhibiting superior capabilities for absorbing electromagnetic waves. In this work, graphene oxide (GO) and polystyrene spheres (PS) were used as precursors to prepare hollow N-doped graphene spheres anchored with non-planar coordination of Pb single-atoms (Pb-N_x/HCS-D). The resulting Pb-N_x/HCS-D features a unique hollow structure, exhibits exceptional electromagnetic wave (EMW) absorption properties with a minimum reflection loss (RL_min) of −47.2 dB at 1.5 mm thickness and an effective absorption bandwidth (EAB) of 4.64 GHz at 1.7 mm, with a low filler content of only 10 wt%. This superior performance originates from the non-planar coordination of single Pb atoms and the interconnected hollow carbon sphere framework, synergistically improving impedance matching and enhancing dielectric loss. This study provides an effective method for synthesizing non-planar-coordination of M − single-atoms for high-performance EMW absorption.

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铅单原子在氮掺杂石墨烯空心球上的电磁波吸收

三维碳基材料由于其轻量化而引起了人们的极大兴趣；然而，在与其他材料结合时，控制其形态同时保持轻质特性仍然是开发具有优异吸收电磁波能力的材料的主要挑战。在这项工作中，以氧化石墨烯（GO）和聚苯乙烯球（PS）为前驱体，制备了以Pb单原子非平面配位锚定的空心掺n石墨烯球（Pb- nx /HCS-D）。所制得的Pb-Nx/HCS-D具有独特的空心结构，具有优异的电磁波吸收性能，在1.5 mm厚度下，最小反射损耗（RLmin）为- 47.2 dB，在1.7 mm厚度下，有效吸收带宽（EAB）为4.64 GHz，填料含量仅为10 wt%。这种优异的性能源于单个Pb原子与相互连接的空心碳球框架的非平面配位，协同改善了阻抗匹配，提高了介电损耗。本研究提供了一种高效吸收EMW的M−单原子非平面配位材料的合成方法。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.