Cu2O@nanoporous carbon composites derived from Cu-based MOFs with ultrabroad-bandwidth electromagnetic wave absorbing performance. Issue 2 (15th January 2021)

• Record Type: Journal Article
• Authors: Yang, Huili; Zhang, Xiang; Xiong, Zhiqiang; Shen, Zhongjing; Liu, Chongbo; Xie, Yu
• Is Part Of: Ceramics international. Volume 47:Issue 2(2021)
• Page Start: 2155
• Page End: 2164
• Publication Date: 2021-01-15
• Subjects: Electromagnetic wave absorption -- Broadband -- Cu2O -- Nanoporous carbon; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.053
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The application of carbon-based materials in microwave absorption (MA) field are limited due to the impedance mismatch caused by high permittivity and low permeability. In this work, Cu2 O@nanoporous carbon (Cu2 O@NPC) composites derived from Cu-based MOFs are synthesized using a simple method. Variation of C and Cu2 O contents in Cu2 O@NPC allows the regulation of permittivity and permeability, resulting in superior ultrabroad-bandwidth absorptivity. The maximum reflection loss (RL) of Cu2 O@NPC-4 is up to −31.1 dB at 5.6 GHz, while the effective bandwidth (RL ≤ −10 dB) can reach 7.3 GHz (10.7–18 GHz) with a matching thickness of 1.85 mm. The results of this study open a new opportunity for solving the impedance mismatch of C-based materials and obtain ultrabroad effective bandwidth.