Details

Autor(en) / Beteiligte

• Chen, Jing
• Wang‡, Hong-Han
• An, Qing-Da
• Xiao, Zuo-Yi
• Dong, Xiao-Ling
• Zhu, Kai-Ruo
• Zhai, Shang-Ru

Titel

Tailored ternary hetero-interfaces with formed CNTs for effective electromagnetic coupling at low/mid-frequency

Ist Teil von

• New journal of chemistry, 2024-01, Vol.48 (3), p.1172-1181

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• With the rapid development of 5G wireless communication technology, the main working ranges of civilian fields are gradually concentrating at low-frequency; however, ternary component modulation engineering, which can optimize the decoupling effect between impedance matching and strong attenuation capability at low-frequency, remains challenging. Herein, Co/MnO@NC- X with tailored ternary hetero-interfaces was prepared by the solvothermal method and subsequent high-temperature pyrolysis, and the modulation of the absorption band was achieved by adjusting the doping ratio of melamine. The minimum reflection loss (RL min ) value of the Co/MnO@NC-3 nanocomposite reaches −41.19 dB at low-frequency (3.6 GHz). The RL min value of the Co/MnO@NC-5 nanocomposite is −40.6 dB at low-frequency (6.0 GHz) and −47.4 dB at mid-frequency (8.8 GHz). In addition, more than 90% of the electromagnetic waves (EMWs) can be absorbed in the 2-18 GHz range by adjusting the thickness of the composites (1.0-5.5 mm). The prominent performance results from the synergy between the magnetic/dielectric/conductive triad. Cobalt provides magnetic loss and effectively catalyzes the in situ growth of CNTs, which construct a conductive network to promote the conductive loss and regulate the impedance matching, while MnO regulates the dielectric loss. Low-frequency absorption is achieved by building a reasonable structure and controlling the degree of graphitization to maximize the attenuation constant while ensuring impedance matching. This strategy provides a simple argument for the development of high-efficiency low/mid-frequency EMW absorbing materials with ternary components. A ternary component modulation strategy to achieve strong absorption in low-frequency bands.