The synthesis of porous carbon material derived from coal liquefied residue and its electromagnetic wave absorption

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2023-10-01 DOI:10.1016/S1872-5805(23)60770-X

Jian-Li Wang , Tian Yin , Chen Zhang , Wang Yang , Bo Jiang , Yong-Feng Li , Chun-Ming Xu

{"title":"The synthesis of porous carbon material derived from coal liquefied residue and its electromagnetic wave absorption","authors":"Jian-Li Wang , Tian Yin , Chen Zhang , Wang Yang , Bo Jiang , Yong-Feng Li , Chun-Ming Xu","doi":"10.1016/S1872-5805(23)60770-X","DOIUrl":null,"url":null,"abstract":"<div>To solve the problem of electromagnetic radiation pollution, it is necessary to develop an economic and environmentally friendly way of producing efficient electromagnetic wave absorbing materials. Carbon-based materials have attracted much attention but finding suitable precursors and ways of producing defined pore structures are still challenges. This work reported a facile method to produce porous carbon by using coal liquefaction oil residue as carbon source. The produced porous skeletons should be attributed to the generated Na2CO3 templates and CO2 gas during the thermal decomposition process of NaHCO3 templates. It is found that changing the pore structure not only adjusts the impedance matching of the material but also increases the length of the electromagnetic wave transmission path and increases dielectric loss. With the combined effect of multiple electromagnetic loss mechanisms, the material has excellent electromagnetic wave absorption. Specifically, with a filler loading of only 10% and a thickness of 2.03 mm, the obtained carbon material has a reflection loss value of −60.28 dB and an effective absorption bandwidth of 5.36 GHz. This work provides a new approach to developing high-performance carbon-based electromagnetic wave absorbing materials and also offers a new idea for the high value-added use of coal liquefaction oil residue products.</div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"38 5","pages":"Pages 875-886"},"PeriodicalIF":5.7000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Carbon Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S187258052360770X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Materials Science","Score":null,"Total":0}

引用次数: 0

Abstract

To solve the problem of electromagnetic radiation pollution, it is necessary to develop an economic and environmentally friendly way of producing efficient electromagnetic wave absorbing materials. Carbon-based materials have attracted much attention but finding suitable precursors and ways of producing defined pore structures are still challenges. This work reported a facile method to produce porous carbon by using coal liquefaction oil residue as carbon source. The produced porous skeletons should be attributed to the generated Na₂CO₃ templates and CO₂ gas during the thermal decomposition process of NaHCO₃ templates. It is found that changing the pore structure not only adjusts the impedance matching of the material but also increases the length of the electromagnetic wave transmission path and increases dielectric loss. With the combined effect of multiple electromagnetic loss mechanisms, the material has excellent electromagnetic wave absorption. Specifically, with a filler loading of only 10% and a thickness of 2.03 mm, the obtained carbon material has a reflection loss value of −60.28 dB and an effective absorption bandwidth of 5.36 GHz. This work provides a new approach to developing high-performance carbon-based electromagnetic wave absorbing materials and also offers a new idea for the high value-added use of coal liquefaction oil residue products.

查看原文本刊更多论文

煤液化渣多孔炭材料的合成及其电磁波吸收

为了解决电磁辐射污染问题，有必要开发一种经济、环保的生产高效电磁波吸收材料的方法。碳基材料已经引起了人们的广泛关注，但寻找合适的前体和产生确定孔结构的方法仍然是一个挑战。本文报道了一种以煤液化油渣为碳源生产多孔炭的简便方法。所产生的多孔骨架应归因于在NaHCO3模板的热分解过程中产生的Na2CO3模板和CO2气体。研究发现，改变孔隙结构不仅可以调整材料的阻抗匹配，还可以增加电磁波传输路径的长度并增加介电损耗。由于多种电磁损耗机制的综合作用，该材料具有良好的电磁波吸收性能。具体而言，在填料负载仅为10%且厚度为2.03 mm的情况下，所获得的碳材料具有−60.28 dB的反射损耗值和5.36 GHz的有效吸收带宽。这项工作为开发高性能碳基电磁波吸收材料提供了一种新的途径，也为煤液化油渣产品的高附加值应用提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.