纤维素制备的多孔碳纳米球经FeNi/NiFe2O4修饰，是一种优异的微波吸收剂

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2025-04-01 Epub Date: 2025-03-16 DOI:10.1016/j.diamond.2025.112215

Jian Luo, Jiahuan Zhu, Yongfeng Ji, Weihong Zhou

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引用次数: 0

摘要

生物质碳源材料具有可持续、低成本和高介电损耗等特点，在微波吸收材料中具有独特的优势。本研究通过两步合成了一种新的FeNi/NiFe2O4/多孔碳球（FNP）复合材料：第一步是用微晶纤维素和聚乙烯吡咯烷酮通过水热法制备碳球，第二步是将FeNi/NiFe2O4颗粒装饰在碳球上，并在800℃煅烧后在碳球上形成孔。FNP复合材料具有显著的MA性能，最小反射损耗为- 53.05 dB，有效吸收带宽高达5.37 GHz。Cole-Cole曲线显示，FeNi和NiFe2O4颗粒对界面极化和磁损失有贡献，而碳球的相互连接导致导电损失。此外，碳球的CN、CO、CO和O- c =O键和缺陷诱导偶极子极化，进一步提高了FNP复合材料的MA性能。

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Porous carbon nano-spheres derived from cellulose decorated by FeNi/NiFe2O4 particles as an outstanding microwave absorbent

Biomass-derived carbon materials have unique advantages in microwave absorption (MA) materials because of sustainable, low-cost and high dielectric loss. In this study, a new FeNi/NiFe₂O₄/porous carbon spheres (FNP) composite was synthesized by two steps: the first step is using microcrystalline cellulose and polyvinylpyrrolidone to prepare carbon spheres through a hydrothermal method, and the second step is decorating FeNi/NiFe₂O₄ particles onto the carbon spheres and making pores in carbon spheres through calcining at 800 °C. The FNP composite displays remarkable MA capabilities with a minimum reflection loss of −53.05 dB and an effective absorption bandwidth up to 5.37 GHz. Cole-Cole curves reveal that FeNi and NiFe₂O₄ particles contribute to interface polarization and magnetic loss, while the interconnected carbon spheres lead to conductive loss. Additionally, the CN, CO, CO, and O-C=O bonds and defects of carbon spheres induce dipole polarization, further enhancing the MA properties of the FNP composites.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.