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Facile One-Pot Solvothermal Synthesis of the RGO/MWCNT/Fe3O4 Hybrids for Microwave Absorption.
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-10 , DOI: 10.1021/acsomega.9b03740 Yongbing Zhou 1 , Xiaomin Zhao 1 , Feixiang Liu 1 , Wei Chi 1 , Jingyu Yao 1 , Guohua Chen 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-10 , DOI: 10.1021/acsomega.9b03740 Yongbing Zhou 1 , Xiaomin Zhao 1 , Feixiang Liu 1 , Wei Chi 1 , Jingyu Yao 1 , Guohua Chen 1
Affiliation
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How to effectively regulate the electromagnetic parameters of magnetic composites to achieve better microwave absorption (MA) performances is still a serious challenge. Herein, we constructed nanocomposites composed of magnetic constituents and carbon materials to obtain high-efficiency electromagnetic wave absorbers. Self-assembled, multi-interfacial, and porous RGO/MWCNT/Fe3O4 hybrids (GMFs) were synthesized via in situ one-pot solvothermal method. The growth mechanism of the GMFs would be that the defects on reduced graphene oxide (RGO) provide sites for the crystallization of Fe3O4. Also, the RGO and Fe3O4 were further linked by the cross-connection of multiwalled carbon nanotubes (MWCNTs), which acted as a bridge. The MA mechanism of GMFs was studied while considering the synergistic effects between the three components (RGO, MWCNT, and raspberry-shaped Fe3O4) and their multi-interfacial and porous structure. Also, the MA performance of the GMFs was conducted. The GMFs exhibited a maximum reflection loss (RL) value of -61.29 dB at 10.48 GHz with a thickness of 2.6 mm when the contents of RGO and MWCNT were 6.3 and 1.3 wt %, respectively. The RL values (≤-10 dB) were observed to be in the range of 8.96-12.32 GHz, and the effective microwave absorption bandwidth was tunable from 3.52 to 18 GHz by changing the sample thickness. The results revealed that the multi-interfacial and porous structure of the GMFs is beneficial to MA performance by inducing multiscatterings. Since no toxic solvents were used, this method is environmentally friendly and has potential for large-scale production. The prepared GMFs may have a wide range of applications in MA materials against electromagnetic interference pollution.
中文翻译：
用于微波吸收的RGO / MWCNT / Fe3O4杂化物的轻松一锅溶剂热合成。
如何有效地调节磁性复合材料的电磁参数以获得更好的微波吸收（MA）性能仍然是一个严峻的挑战。本文中，我们构建了由磁性成分和碳材料组成的纳米复合材料，以获得高效的电磁波吸收体。通过原位一锅溶剂热法合成了自组装，多界面和多孔的RGO / MWCNT / Fe3O4杂化物（GMF）。GMF的生长机理是还原氧化石墨烯（RGO）上的缺陷为Fe3O4的结晶提供了位置。另外，RGO和Fe3O4通过充当桥梁的多壁碳纳米管（MWCNT）的交叉连接而进一步连接。研究了GMF的MA机制，同时考虑了三个成分（RGO，MWCNT，和覆盆子状的Fe3O4）及其多界面和多孔结构。此外，还进行了GMF的MA绩效。当RGO和MWCNT的含量分别为6.3和1.3 wt％时，GMF在10.48 GHz时的最大反射损耗（RL）值为-61.29 dB，厚度为2.6 mm。RL值（≤-10dB）在8.96-12.32 GHz范围内，通过改变样品厚度，有效微波吸收带宽可从3.52调整到18 GHz。结果表明，GMF的多界面和多孔结构通过诱导多重散射而有利于MA性能。由于未使用有毒溶剂，因此该方法对环境友好，具有大规模生产的潜力。
更新日期：2020-02-18
中文翻译：
用于微波吸收的RGO / MWCNT / Fe3O4杂化物的轻松一锅溶剂热合成。
如何有效地调节磁性复合材料的电磁参数以获得更好的微波吸收（MA）性能仍然是一个严峻的挑战。本文中，我们构建了由磁性成分和碳材料组成的纳米复合材料，以获得高效的电磁波吸收体。通过原位一锅溶剂热法合成了自组装，多界面和多孔的RGO / MWCNT / Fe3O4杂化物（GMF）。GMF的生长机理是还原氧化石墨烯（RGO）上的缺陷为Fe3O4的结晶提供了位置。另外，RGO和Fe3O4通过充当桥梁的多壁碳纳米管（MWCNT）的交叉连接而进一步连接。研究了GMF的MA机制，同时考虑了三个成分（RGO，MWCNT，和覆盆子状的Fe3O4）及其多界面和多孔结构。此外，还进行了GMF的MA绩效。当RGO和MWCNT的含量分别为6.3和1.3 wt％时，GMF在10.48 GHz时的最大反射损耗（RL）值为-61.29 dB，厚度为2.6 mm。RL值（≤-10dB）在8.96-12.32 GHz范围内，通过改变样品厚度，有效微波吸收带宽可从3.52调整到18 GHz。结果表明，GMF的多界面和多孔结构通过诱导多重散射而有利于MA性能。由于未使用有毒溶剂，因此该方法对环境友好，具有大规模生产的潜力。
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