Two-Dimensional CNPs Superstructures Derived from Metal–Organic Frameworks for Electromagnetic Wave Absorption

• Published in: ACS applied materials & interfaces 2024-11, Vol.16 (47), p.65173-65184
• Main Authors: Liu, Zequn, Zhao, Honghong, Yao, Junru, Liang, Minjie, Sun, Youyi, Gu, Ning, Cao, Yang
• Format: Article
• Language: English
• Subjects: Functional Nanostructured Materials (including low-D carbon)
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.4c14804

Carbon nanoparticles (CNPs) derived from metal–organic frameworks (ZIF-8) are synthesized, which are further self-assembled into mono- or bilayer superstructures for electromagnetic (EM) wave absorption. Furthermore, the effect of ZIF-8 morphology (cubic or rhombic dodecahedral) on the superstructure and EM absorption performance of CNPs is investigated. The as-prepared cubic bilayer superstructure exhibits a higher BET surface area of 526.1 m2/g and a higher pore volume of 0.232 cm3/g than the rhombic dodecahedral monolayer superstructure (30.0 m2/g and 0.051 cm3/g, respectively). As a result, the two-dimensional CNPs with a bilayer structure are able to deliver the highest EM absorption performance with an effective absorption bandwidth of 6.2 GHz at a thickness of merely 2.4 mm. This work provides a new approach to designing and preparing high-performance EM wave absorption materials.