Capping Agent–Induced ZIF-8-Based ZnO/Magnetic Carbon Nanocomposites for Enhanced Broadband Microwave Absorption
Source abstract
Abstract
Metal–organic framework derivatives have emerged as promising contenders for microwave absorption, with their morphology considerably influencing their electromagnetic wave absorption capabilities. However, owing to the uncontrollability of precise derivative structures, challenges persist in improving reflection loss (RL) and absorption bandwidth. Herein, we proposed a “capping agent induction” strategy using cetyltrimethylammonium bromide as a surfactant to precisely control the size and morphology of zeolite imidazolate framework (ZIF)-8 crystals, followed by pyrolysis in air. We demonstrated the process of capping agent–induced crystal growth toward multiple dimensions and revealed the regulation of microwave absorption. As a result, the optimized carbon–based magnetic material (ZnO–N–C) exhibited a minimum RL of −47.64 dB at 4.32 GHz with a thickness of 2 mm, along with an effective absorption bandwidth of 3.82 GHz. We achieved an effective absorption bandwidth of 6.8 GHz at a thickness of 2.5 mm, reflecting the effectiveness of our application design.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Sensors, Beijing Information Science and Technology University, Beijing 100192, China
Key Laboratory of Modern Measurement & Control Technology, Ministry of Education, Beijing Information Science & Technology University, Beijing 100192, China
Key Laboratory of Photoelectric Testing Technology, Beijing Information Science & Technology University, Beijing 100192, China
Saint Petersburg State University, Universitetskaya Nab., 7/9 , Saint Petersburg 198504, Russian Federation
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Funding
National Natural Science Foundation of China · The Project of Construction and Support for High-Level Innovative Teams of Beijing Municipal Institutions
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