Bio-inspired, bimetal ZIF-derived hollow carbon/MXene microstructure aim for superior microwave absorption
Bio-inspired, bimetal ZIF-derived hollow carbon/MXene microstructure aim for superior microwave absorption
复制标题
DOI：
10.1016/j.jcis.2022.06.011
复制
发表时间：
2022-11-01
影响因子：
9.9
通讯作者：
Zhang, Di
中科院分区：
文献类型：
--
作者：
Ling, Xin;Wang, Kaifeng;Zhang, Di
电磁污染已成为一个日益重要的问题，它既影响电子设备的准确运行，又影响人身安全。为了减轻和消除电磁辐射，设计具有理想吸收强度和宽有效频带的微波吸收材料是必然的。碳基材料与磁性材料的结合是实现高吸波性能的有效途径，但其微观结构也不容忽视。受叶蝉微结构电磁响应特性的启发，以ZIF为前驱体，通过静电组装和煅烧工艺，采用界面剪裁策略，构建了具有中空空隙的异质微结构，综合了各组分和微结构的优点，提高了材料的吸波性能。当填充量为20%、厚度为2.92 mm时，在7.50 GHz处的反射损耗最小值为-76.40 dB，有效吸收带宽可根据需要在3.55 ~ 18 GHz范围内进行调整。生物启发的策略被验证为一种有前途的方法，在下一代微波吸收剂的设计中表现出巨大的潜力。(c)2022爱思唯尔公司All rights reserved.
Electromagnetic pollution has become an increasingly important problem which has drawbacks to both the accurate operation of the electronic facilities and the safety of human beings. To alleviate and eliminate electromagnetic irradiation, it is inevitable to design microwave absorption materials with desirable absorption intensity and broad effective frequency bandwidth. The combination of carbon-based materials and magnetic materials is an adoptable strategy to perform remarkable microwave absorption performance, while the microstructure should not be ignored. Inspired by the electromagnetic response behaviors of the microstructure from the leafhopper, the hetero-microstructure with hollow void is constructed by adopting bimetal ZIF as the precursor, followed by an interfacial tailoring strategy through electrostatic assembling and calcinating process, which enhances the microwave absorption performance by integrating the merits between the components and the micro-structure. The minimum value of reflection loss achieved-76.40 dB at 7.50 GHz under filler loading of 20% with the thickness of 2.92 mm. Besides, the effective absorption bandwidth could be tailored from 3.55 to 18 GHz among different thicknesses as required. The bio-inspired strategy is validated as a promising method, exhibiting great potential in the designing of the next-generation microwave absorber.(c) 2022 Elsevier Inc. All rights reserved.