Article

Hierarchically Porous Carbons Derived from Biomasses with Excellent Microwave Absorption Performance

Zhengchen WuCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, ChinaKe TianCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, ChinaTing HuangCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, ChinaWei HuCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, ChinaFeifei XieCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, ChinaJingjing WangAdvanced Materials Academy, Luoyang Ship Material Research Institute, Xiamen 361001, ChinaMengxing SuAdvanced Materials Academy, Luoyang Ship Material Research Institute, Xiamen 361001, ChinaLei LiCollege of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China

2018en

ABI

Abstract

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.

Identifiers

DOI: 10.1021/acsami.7b17264

Citations and references

Cited by 20 references

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