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无硫膨胀石墨/FeO 复合材料的制备及其吸波性能。

Synthesis and Microwave Absorption Properties of Sulfur-Free Expanded Graphite/FeO Composites.

机构信息

Xi'an Modern Control Technology Research Institute, Xi'an 710065, China.

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

出版信息

Molecules. 2020 Jul 3;25(13):3044. doi: 10.3390/molecules25133044.

DOI:10.3390/molecules25133044
PMID:32635346
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7411745/
Abstract

In this study, sulfur-free expanded graphite (EG) was obtained by using flake graphite as the raw material, and EG/FeO composites with excellent microwave absorption properties were prepared by a facile one-pot co-precipitation method. The structure and properties of as-prepared EG/FeO were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Raman, X-ray photoelectron spectrometry (XPS), thermogravimetric (TG), and vibrating sample magnetometry (VSM) characterizations. The FeO intercalated between the layers of expanded graphite forms a sandwich-like structure which is superparamagnetic and porous. When applied as a microwave absorber, the reflection loss (R) of EG/FeO reaches -40.39 dB with a thickness of 3.0 mm (10 wt% loading), and the effective absorption bandwidth (EAB < -10 dB) with R exceeding -10 dB is 4.76-17.66 GHz with the absorber thickness of 1.5-4.0 mm. Considering its non-toxicity, easy operation, low cost, suitability for large-scale industrial production, and excellent microwave absorbing performance, EG/FeO is expected to be a promising candidate for industrialized electromagnetic absorbing materials.

摘要

在这项研究中，以鳞片石墨为原料，制备了无硫膨胀石墨（EG），并通过简便的一步共沉淀法制备了具有优异微波吸收性能的 EG/FeO 复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外（FT-IR）、X 射线衍射（XRD）、拉曼、X 射线光电子能谱（XPS）、热重（TG）和振动样品磁强计（VSM）对制备的 EG/FeO 的结构和性能进行了研究。插层在膨胀石墨层之间的 FeO 形成三明治状结构，具有超顺磁性和多孔性。当用作微波吸收剂时，EG/FeO 的反射损耗（R）在 3.0mm 厚度下达到-40.39dB（10wt%负载），且在 1.5-4.0mm 吸收体厚度下，R 超过-10dB 的有效吸收带宽（EAB<-10dB）为 4.76-17.66GHz。考虑到其无毒、操作简单、成本低、适合大规模工业生产以及优异的微波吸收性能，EG/FeO 有望成为工业化电磁吸收材料的有前途的候选材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/ad66c6354f3d/molecules-25-03044-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/faa8afd941e2/molecules-25-03044-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/cd610bb86d40/molecules-25-03044-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/3010d88813dc/molecules-25-03044-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/9d7807247f7d/molecules-25-03044-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/3519c865ab20/molecules-25-03044-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/6188556414cd/molecules-25-03044-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/ed33f115e361/molecules-25-03044-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/85a87b8af50d/molecules-25-03044-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/631bc802f506/molecules-25-03044-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/ad66c6354f3d/molecules-25-03044-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/faa8afd941e2/molecules-25-03044-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/cd610bb86d40/molecules-25-03044-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/3010d88813dc/molecules-25-03044-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/9d7807247f7d/molecules-25-03044-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/3519c865ab20/molecules-25-03044-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/6188556414cd/molecules-25-03044-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/ed33f115e361/molecules-25-03044-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/85a87b8af50d/molecules-25-03044-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/631bc802f506/molecules-25-03044-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f65a/7411745/ad66c6354f3d/molecules-25-03044-g010.jpg

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