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一种新型的低密度生物质碳复合材料，涂覆有地毯状和蒲公英状稀土掺杂钴铁氧体，用于增强微波吸收。

A Novel Low-Density-Biomass-Carbon Composite Coated with Carpet-like and Dandelion-Shaped Rare-Earth-Doped Cobalt Ferrite for Enhanced Microwave Absorption.

作者信息

Shang Tao, Zhu Hongwei, Shang Yichun, Wu Ruixia, Zhao Xuebing

机构信息

Department of Physics Science and Technology, Baotou Teacher's College, Baotou 014030, China.

Key Laboratory of Industrial Biocatalysis, Ministry of Education, Tsinghua University, Beijing 100084, China.

出版信息

Molecules. 2024 Jun 2;29(11):2620. doi: 10.3390/molecules29112620.

DOI:10.3390/molecules29112620
PMID:38893496
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11173665/
Abstract

A novel low-density composite for the absorption of microwaves was prepared by loading La-doped spinel cobalt ferrite (La-CFO) onto biomass carbon (BC) derived from corn stalks using a hydrothermal method. This composite (La-CFO@BC) not only maintained the advantageous properties of low density and abundant porosity, but also exhibited a unique morphology, with La-CFO displaying a carpet-like structure interspersed with dandelion-shaped particles. The incorporation of La-CFO effectively tuned the electromagnetic parameters of the composite, thereby improving its impedance-matching attributes and its ability to absorb microwave radiation. At a frequency of 12.8 GHz for electromagnetic waves and with a thickness of 2.5 mm, La-CFO@BC demonstrated remarkable performance in microwave absorption, attaining a noteworthy minimum reflection () of -53.2 dB and an effective absorption bandwidth (EAB) of 6.4 GHz. Furthermore, by varying the thickness of the La-CFO@BC within the range of 1.0 to 5.5 mm, the EAB could be broadened to 13.8 GHz, covering the entire X-band, the entire Ku-band, and a substantial portion of the C-band. This study demonstrated that La-CFO@BC was a promising alternative for electromagnetic wave attenuation, which offered superior performance in microwave absorption.

摘要

通过水热法将镧掺杂的尖晶石型钴铁氧体（La-CFO）负载到源自玉米秸秆的生物质碳（BC）上，制备了一种新型的低密度微波吸收复合材料。这种复合材料（La-CFO@BC）不仅保持了低密度和丰富孔隙率的有利特性，还呈现出独特的形态，其中La-CFO呈现出类似地毯的结构，散布着蒲公英形状的颗粒。La-CFO的掺入有效地调节了复合材料的电磁参数，从而改善了其阻抗匹配特性及其吸收微波辐射的能力。在电磁波频率为12.8 GHz且厚度为2.5 mm时，La-CFO@BC在微波吸收方面表现出卓越性能，达到了值得注意的最小反射率（）-53.2 dB和有效吸收带宽（EAB）6.4 GHz。此外，通过在1.0至5.5 mm范围内改变La-CFO@BC的厚度，EAB可以拓宽至13.8 GHz，覆盖整个X波段、整个Ku波段以及C波段的很大一部分。这项研究表明，La-CFO@BC是一种有前途的电磁波衰减替代材料，在微波吸收方面具有卓越性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/9a9aa63ea7b8/molecules-29-02620-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/6c6d41c0ccf4/molecules-29-02620-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/2d9e8f3c8fae/molecules-29-02620-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/4c654d64b9af/molecules-29-02620-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/77caa8d0e7d2/molecules-29-02620-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/00bc2725ace2/molecules-29-02620-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/199961a25635/molecules-29-02620-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/c8e2fcf41879/molecules-29-02620-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/5381e11f431f/molecules-29-02620-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/f4a06323a0bc/molecules-29-02620-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/9fef9cb82903/molecules-29-02620-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/a672458665e4/molecules-29-02620-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/9a9aa63ea7b8/molecules-29-02620-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/6c6d41c0ccf4/molecules-29-02620-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/2d9e8f3c8fae/molecules-29-02620-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/4c654d64b9af/molecules-29-02620-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/77caa8d0e7d2/molecules-29-02620-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/00bc2725ace2/molecules-29-02620-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/199961a25635/molecules-29-02620-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/c8e2fcf41879/molecules-29-02620-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/5381e11f431f/molecules-29-02620-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/f4a06323a0bc/molecules-29-02620-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/9fef9cb82903/molecules-29-02620-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/a672458665e4/molecules-29-02620-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4356/11173665/9a9aa63ea7b8/molecules-29-02620-g012.jpg

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本文引用的文献

[1]
Advancements in Microwave Absorption Motivated by Interdisciplinary Research.

Adv Mater. 2024-1

[2]
Lotus Leaf Derived NiS/Carbon Nanofibers/Porous Carbon Heterogeneous Structures for Strong and Broadband Microwave Absorption.

Small. 2023-12

[3]
State of the art and prospects of FeO/carbon microwave absorbing composites from the dimension and structure perspective.

Adv Colloid Interface Sci. 2023-8

[4]
Commonly Neglected Ester Groups Enhanced Microwave Absorption.

Small. 2023-11

[5]
Efficiently catalytic degradation of tetracycline via persulfate activation with plant-based biochars: Insight into endogenous mineral self-template effect and pyrolysis catalysis.

Chemosphere. 2023-10

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3D lamellar skeletal network of porous carbon derived from hull of water chestnut with excellent microwave absorption properties.

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Adv Sci (Weinh). 2022-4

[8]
Biomass-Derived Carbon Heterostructures Enable Environmentally Adaptive Wideband Electromagnetic Wave Absorbers.

Nanomicro Lett. 2021-12-4

[9]
Novel Three-Dimensional Graphene-Like Networks Loaded with FeO Nanoparticles for Efficient Microwave Absorption.

Nanomaterials (Basel). 2021-5-29

[10]
Constructing a nitrogen-doped carbon and nickel composite derived from a mixed ligand nickel-based a metal-organic framework toward adjustable microwave absorption.

Nanoscale. 2021-5-27

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