Hierarchically Porous Carbons Derived from Biomasses with Excellent Microwave Absorption Performance,ACS Applied Materials & Interfaces

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Hierarchically Porous Carbons Derived from Biomasses with Excellent Microwave Absorption Performance
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-07 00:00:00 , DOI: 10.1021/acsami.7b17264
Zhengchen Wu ₁ , Ke Tian ₁ , Ting Huang ₁ , Wei Hu ₁ , Feifei Xie ₁ , Jingjing Wang _{2,

3} , Mengxing Su _{2,

3} , Lei Li ₁

Affiliation

A variety of biomass-based carbon materials with two-level porous structure have been successfully prepared by one-step carbonization process. The first level of microscale pores templates from the inherent porous tissues, while the second one of nanopores is produced by the in situ etching by the embedded alkaline metal elements. The superimposed effect of nano and microscale pores endows the hierarchically porous carbons (HPCs) with excellent microwave absorption (MA) performance. Among them, the spinach-derived HPC exhibits a maximum reflection loss of −62.2 dB and a broad effective absorption bandwidth of 7.3 GHz. Particularly, this excellent MA performance can be reproduced using the biomass materials belonging to different families, harvested seasons, and origins, indicating a green and sustainable process. These encouraging findings shed the insights on the preparation of biomass-derived microwave absorbents with promising practical applications.

中文翻译：

源自生物质的分层多孔碳具有出色的微波吸收性能

通过一步碳化法成功地制备了多种具有两级多孔结构的生物质基碳材料。第一级的微孔模板来自固有的多孔组织，而第二级的纳米孔是通过嵌入的碱金属元素进行原位蚀刻而产生的。纳米和微米级孔隙的叠加效应赋予了分层多孔碳（HPC）出色的微波吸收（MA）性能。其中，菠菜衍生的HPC表现出最大反射损耗为-62.2 dB，有效吸收带宽为7.3 GHz。特别地，可以使用属于不同科，收获季节和起源的生物质材料来再现这种优异的MA性能，这表明绿色和可持续的过程。

更新日期：2018-03-07

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