Synthesis of N/O Atoms Co‐doped Biochar with 3D Porous Structure for Effective Electromagnetic Wave Absorption

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Chemistry - An Asian Journal Pub Date : 2024-09-12 DOI:10.1002/asia.202400465

Zheng Yang, Mengjie Zhang, Shipeng Wang, Yuqing Lu, Boyue Yu, Nian Liu, Xinrui Gao, Qingwen Wang, Wei Yang, Qianqian Li, Jing Wang

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Abstract

Developing biochar with large specific surface area (SSA), heteroatom doping, and porous structure is attracting substantial attention to absorb electromagnetic wave (EMW) in recent. Herein, a novel method of ethanol and KOH co‐treatment is used to produce the biomass carbon deriving from pitaya peels. The obtained carbon possesses the high SSA of 1580 m2/g, successful N/O atoms co‐doping, and massive pores with different size. The results of EMW absorption measurement show that the prepared biochar could achieve over 99% absorpition to EMW, which the highest reflection loss is of ca. ‐45.25 dB at 7.54 GHz with an effective absorption bandwidth (EAB) of ca. 4.87 GHz. The execellent microwave absorption property is caused by the surface defects, dipole and interface polarizations of the synthesized biochar owning unique microstructure and N/O atoms co‐doping. Hence, this avenue provides a new reference for fabricating low‐cost and eco‐friendly biochar as a microwave absorber.

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合成具有三维多孔结构的 N/O 原子掺杂生物炭以有效吸收电磁波

近年来，开发具有大比表面积（SSA）、杂原子掺杂和多孔结构的生物炭以吸收电磁波（EMW）备受关注。本文采用乙醇和 KOH 共处理的新方法来生产从番木瓜皮中提取的生物质炭。所获得的碳具有 1580 m2/g 的高 SSA、成功的 N/O 原子共掺杂以及不同尺寸的大量孔隙。电磁波吸收测量结果表明，制备的生物炭对电磁波的吸收率超过 99%，在 7.54 GHz 时的最高反射损耗约为 -45.25 dB，有效吸收带宽（EAB）约为 4.87 GHz。这种优异的微波吸收特性是由于合成的生物炭具有独特的微观结构和 N/O 原子共掺杂的表面缺陷、偶极子和界面极化造成的。因此，该研究为制造低成本、环保型生物炭微波吸收器提供了新的参考。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).