ZnO @ N-doped porous carbon/Co3ZnC core-shell heterostructures with enhanced electromagnetic wave attenuation ability
ZnO @ N-doped porous carbon/Co3ZnC core-shell heterostructures with enhanced electromagnetic wave attenuation ability
复制标题
具有增强电磁波衰减能力的ZnO@N掺杂多孔碳/Co3ZnC核壳异质结构
DOI：
10.1016/j.cej.2018.02.078
复制
发表时间：
2018-06-15
影响因子：
15.1
通讯作者：
Zhou, Yu
中科院分区：
文献类型：
--
作者：
Feng, Wei;Wang, Yaming;Zhou, Yu
本研究开发了一种合成策略，以快速构建具有嵌入Co3ZnC纳米颗粒的壳层异质结构的氧化锌核心和氮掺杂多孔碳，以用于电磁波吸收。以氧化锌胶体为模板，锌源为前驱体，制备了ZIF67@ZIF8@氧化锌核壳结构。热处理后，双层ZIF涂层转变为N掺杂的多孔碳和弥散分布的Co3ZnC纳米粒子壳层。与原始的氧化锌胶体和纯ZIF67制备的多孔碳/钴纳米颗粒复合材料相比，核壳异质结构表现出最显著的电磁波吸收性能，具有较强的吸收(最小反射损耗为-62.9dB)和较宽的有效吸收带宽(5.5 GHz)。这种性能的提高可以归因于多个界面、掺杂原子和基团，以及独特的核壳结构赋予的改善的阻抗匹配。
This study develops a synthetic strategy to rapidly construct a ZnO core and N-doped porous carbon with embedded Co3ZnC nanoparticles shell heterostructure for electromagnetic wave absorption. ZnO colloidal is used as template and zinc source to fabricate ZIF67@ZIF8@ZnO core-shell structures as precursors. After annealing, the double-layered ZIF coating transforms into N-doped porous carbon and dispersive Co3ZnC nanoparticles shell outside the ZnO core. Compared with pristine ZnO colloidal and pure ZIF67 derived porous carbon/ Co nanoparticles composites, the core-shell heterostructures shows the most prominent electromagnetic wave absorption properties with strong absorption (minimum reflection loss of -62.9 dB) and broad effective absorption bandwidth (5.5 GHz). The enhanced properties can be ascribed to the multiple interfaces, doped atoms and groups, as well as the improved impedance matching endowed by the unique core-shell structure.