Carbonized Design of Hierarchical Porous Carbon/Fe3O4@Fe Derived from Loofah Sponge to Achieve Tunable High-Performance Microwave Absorption
Carbonized Design of Hierarchical Porous Carbon/Fe3O4@Fe Derived from Loofah Sponge to Achieve Tunable High-Performance Microwave Absorption
复制标题
丝瓜络分级多孔碳/Fe3O4@Fe的碳化设计实现可调谐高性能微波吸收
DOI：
10.1021/acssuschemeng.8b02089
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发表时间：
2018-09-01
影响因子：
8.4
通讯作者：
Zhou, Zuowan
中科院分区：
文献类型：
--
作者：
Wang, Huagao;Meng, Fanbin;Zhou, Zuowan
最近，来自生物质的三维（3D）多孔碳材料由于其低成本、广泛可用性和可持续性而成为有前途的微波吸收材料，引起了人们的兴趣。本文提出了以丝瓜海绵为三维分层多孔碳前驱体，硝酸铁为磁性前驱体制备具有可调高性能微波吸收性能的磁性分层多孔碳复合材料的新策略。在炭化过程中，丝瓜海绵的3d捆绑微管结构转变为具有分层多孔结构的互联网络，前驱体硝酸铁转化为磁性Fe3O4@Fe纳米颗粒。正如预期的那样，丝瓜海绵衍生的3D多孔碳/Fe3O4@Fe复合材料在600℃下处理后表现出出色的MA性能。厚度为2mm时，最小反射损耗（RL）为-49.6 dB，有效吸收带宽（RL）为-49.6 dB
Recently, three-dimensional (3D) porous carbon materials derived from biomass have been gaining interest as promising microwave absorbers due to their low cost, vast availability, and sustainability of biomasses. Herein, a novel strategy of utilizing loofah sponge as 3D hierarchical porous carbon precursors and ferric nitrate as magnetic precursor to prepare magnetic hierarchical porous carbon composites, which exhibit tunable high-performance microwave absorption (MA). During the carbonization process, the 3D-bundled microtube structure of loofah sponge changes into interconnected networks with hierarchical porous structures, and the precursor ferric nitrate converts into magnetic Fe3O4@Fe nanoparticles. As expected, the as-obtained loofah sponge-derived 3D porous carbon/Fe3O4@Fe composites treated at 600 degrees C exhibit outstanding MA performance. It displays the minimum reflection loss (RL) of -49.6 dB with a thickness of 2 mm, and the effective absorption bandwidth (RL