首页|Phytic acid-assisted hybrid engineering of MOF-derived composites for tunable electromagnetic wave absorption

Phytic acid-assisted hybrid engineering of MOF-derived composites for tunable electromagnetic wave absorption

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Hybrid engineering is gradually deemed as a powerful approach to solving the bottleneck problem of metal-organic framework(MOF)derived absorbers for practical application.Herein,a new type of semiconductor/carbon-based hybrid material was successfully prepared by phytic acid(PA)modification and carbonization of MOF/bacterial cellulose(BC)precursors,which remedied the drawbacks of struc-tural instability,lethal byproducts and complicated steps reported previously.Specifically,the obtained Fe(PO3)2@C/phosphorus-doped carbon foam(Fe(PO3)2@C/PCF)had a 3D hybrid micro-nanostructure that integrated spatial microcurrent network,multi-level pores,heterogeneous interfaces and lattice defects,showing its unique advantages of low filler content(15 wt.％),moderate surface reflectivity,multi-band microwave absorption and radar stealth.The experimental analysis and CST simulation further revealed that PA dosage can precisely adjust the hybrid phase content,pore texture and electromagnetic param-eters of the final product to achieve synergistic enhancement of multiple dielectric response,impedance matching and attenuation capacity.As a result,an effective bandwidth(EAB)of 6 GHz and a minimum reflection loss(RLmin)of-57.0 dB were obtained in the Ku-and C-bands,respectively.These encourag-ing results may advance the development of novel MOF-derived absorbents based on the hybridization principle.

Hybrid engineeringMOF derivativesPhytic acidMicrowave absorption

Xiang Zhang、Kai Yao、Xiao Wang、Jinli Wang、Hongtao Guo、Xiaona Ma、Yang Yang、Hongjing Wu、Wei Lu

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Shanghai Key Lab.of D&A for Metal-Functional Materials,School of Materials Science & Engineering,Tongji University,Shanghai 201804,China

School of Science,Northwestern Polytechnical University,Xi'an 710072,China

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaProgram of Shanghai Technology Research Leader

2019YFE01229005237330318XD1423800

2024

10.1016/j.jmst.2023.10.054

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.186(19)
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