Synergistic effects of nitrogen/oxygen co-doping in 3D mesoporous carbon nanospheres for enhanced microwave absorption

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2024-09-07 DOI:10.1016/j.micromeso.2024.113323

Khadija Kousar , Huasheng Liang , Lei Ma , Sibt ul Hassan , Tauqeer Haidar Qamar , Xia Pengkun , Shengxiang Huang , Lianwen Deng

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Abstract

Mesoporous carbon nanospheres have attracted significant attention in the microwave absorption (MA) field due to the broad benefits provided by their mesoporous structure. This study presents a facile hard template strategy to construct distinctive 3D N/O co-doped mesoporous carbon nanospheres (NOCS). The high surface area, abundant mesopores, and high nitrogen (N) doping levels, with proper defects on the surface provide multiple sites to absorb electromagnetic waves (EMW). Mesoporous carbon nanospheres achieve significant reflection loss (RL) of −48.19 dB and extensive effective absorption bandwidth (EAB) up to 5.52 GHz. Moreover, computer simulation technology (CST) demonstrated that all simulated Radar cross-section (RCS) values were below 20 dB m². Thus, this work holds significant promise for effective microwave absorbers using mesoporous carbon nanospheres.

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三维介孔碳纳米球中氮/氧共掺杂的协同效应可增强微波吸收能力

介孔碳纳米球因其介孔结构所带来的广泛优势而在微波吸收（MA）领域备受关注。本研究提出了一种简便的硬模板策略来构建独特的三维 N/O 共掺介孔碳纳米球（NOCS）。高比表面积、丰富的介孔、高氮（N）掺杂水平以及适当的表面缺陷为吸收电磁波（EMW）提供了多个位点。介孔碳纳米球的反射损耗（RL）高达 -48.19 dB，有效吸收带宽（EAB）高达 5.52 GHz。此外，计算机模拟技术（CST）表明，所有模拟的雷达截面（RCS）值都低于 20 dB m2。因此，这项工作为利用介孔碳纳米球制造有效的微波吸收器带来了重大希望。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.