Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers

Panpan Zhou; Jing Zhang; Hongli Zhu; Lixi Wang; Xiaokang Wang; Zhi Song; Qitu Zhang; Mingxun Yu; Zhihao Liu; Tong Xu; Wanxun Feng; Xia Feng

doi:10.1021/acsami.9b23287

Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers

Panpan Zhou, Jing Zhang, Hongli Zhu, Lixi Wang, Xiaokang Wang, Zhi Song, Qitu Zhang, Mingxun Yu, Zhihao Liu, Tong Xu, Wanxun Feng, Xia Feng

College of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

Ordered mesoporous carbon (OMC) is considered to be a prospective carbon-based material for microwave absorption because of its abundant well-ordered mesoporous structures, high specific surface area, numerous active sites, and facile preparation process. However, its development has been seriously hindered by its poor impedance-matching characteristic. Herein, silica-modified OMC composites with a designable impedance-matching transition layer are successfully fabricated via a self-assembly method and succeeding calcination treatment. In addition, the silica in OMC@SiO₂ composites can maintain the mesoporous structure, which facilitates the scattering and reflection of microwaves in the tunnel structure. The as-prepared sample OMC-5@SiO₂ exhibits a minimum reflection loss (RL) value of-40.7 dB at 10.8 GHz with 2 mm and an effective absorption bandwidth (RL ≤-10 dB) of 4.8 GHz with a thinner absorber thickness of 1.5 mm. We believe that the as-prepared OMC@SiO₂ composites can be prospective candidates as high-efficiency and lightweight microwave absorbers.

Original language	English
Pages (from-to)	23252-23260
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	20
DOIs	https://doi.org/10.1021/acsami.9b23287
State	Published - 20 May 2020

Keywords

dielectric loss
impedance matching
lightweight
microwave absorption
ordered mesoporous carbon

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title = "Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers",

abstract = "Ordered mesoporous carbon (OMC) is considered to be a prospective carbon-based material for microwave absorption because of its abundant well-ordered mesoporous structures, high specific surface area, numerous active sites, and facile preparation process. However, its development has been seriously hindered by its poor impedance-matching characteristic. Herein, silica-modified OMC composites with a designable impedance-matching transition layer are successfully fabricated via a self-assembly method and succeeding calcination treatment. In addition, the silica in OMC@SiO2 composites can maintain the mesoporous structure, which facilitates the scattering and reflection of microwaves in the tunnel structure. The as-prepared sample OMC-5@SiO2 exhibits a minimum reflection loss (RL) value of-40.7 dB at 10.8 GHz with 2 mm and an effective absorption bandwidth (RL ≤-10 dB) of 4.8 GHz with a thinner absorber thickness of 1.5 mm. We believe that the as-prepared OMC@SiO2 composites can be prospective candidates as high-efficiency and lightweight microwave absorbers.",

keywords = "dielectric loss, impedance matching, lightweight, microwave absorption, ordered mesoporous carbon",

author = "Panpan Zhou and Jing Zhang and Hongli Zhu and Lixi Wang and Xiaokang Wang and Zhi Song and Qitu Zhang and Mingxun Yu and Zhihao Liu and Tong Xu and Wanxun Feng and Xia Feng",

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doi = "10.1021/acsami.9b23287",

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T1 - Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers

AU - Zhou, Panpan

AU - Zhang, Jing

AU - Zhu, Hongli

AU - Wang, Lixi

AU - Wang, Xiaokang

AU - Song, Zhi

AU - Zhang, Qitu

AU - Yu, Mingxun

AU - Liu, Zhihao

AU - Xu, Tong

AU - Feng, Wanxun

AU - Feng, Xia

PY - 2020/5/20

Y1 - 2020/5/20

N2 - Ordered mesoporous carbon (OMC) is considered to be a prospective carbon-based material for microwave absorption because of its abundant well-ordered mesoporous structures, high specific surface area, numerous active sites, and facile preparation process. However, its development has been seriously hindered by its poor impedance-matching characteristic. Herein, silica-modified OMC composites with a designable impedance-matching transition layer are successfully fabricated via a self-assembly method and succeeding calcination treatment. In addition, the silica in OMC@SiO2 composites can maintain the mesoporous structure, which facilitates the scattering and reflection of microwaves in the tunnel structure. The as-prepared sample OMC-5@SiO2 exhibits a minimum reflection loss (RL) value of-40.7 dB at 10.8 GHz with 2 mm and an effective absorption bandwidth (RL ≤-10 dB) of 4.8 GHz with a thinner absorber thickness of 1.5 mm. We believe that the as-prepared OMC@SiO2 composites can be prospective candidates as high-efficiency and lightweight microwave absorbers.

AB - Ordered mesoporous carbon (OMC) is considered to be a prospective carbon-based material for microwave absorption because of its abundant well-ordered mesoporous structures, high specific surface area, numerous active sites, and facile preparation process. However, its development has been seriously hindered by its poor impedance-matching characteristic. Herein, silica-modified OMC composites with a designable impedance-matching transition layer are successfully fabricated via a self-assembly method and succeeding calcination treatment. In addition, the silica in OMC@SiO2 composites can maintain the mesoporous structure, which facilitates the scattering and reflection of microwaves in the tunnel structure. The as-prepared sample OMC-5@SiO2 exhibits a minimum reflection loss (RL) value of-40.7 dB at 10.8 GHz with 2 mm and an effective absorption bandwidth (RL ≤-10 dB) of 4.8 GHz with a thinner absorber thickness of 1.5 mm. We believe that the as-prepared OMC@SiO2 composites can be prospective candidates as high-efficiency and lightweight microwave absorbers.

KW - dielectric loss

KW - impedance matching

KW - lightweight

KW - microwave absorption

KW - ordered mesoporous carbon

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Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers

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