Lightweight, three-dimensional carbon Nanotube@TiO2 sponge with enhanced microwave absorption performance

By Zichao Mo, Rongliang Yang, Dongwei Lu, Leilei Yang, Qingmei Hu, Hongbian Li, Hai Zhu, Zikang Tang, Xuchun Gui. Carbon, 2019

179 citations recorded by the source corpus.

Abstract Porous, spongy absorbers are considered to be the most promising candidates for lightweight and highly efficient microwave absorption material. However, conventional sponges or foams reported previously are difficult to meet the high performance requirements. Here, a lightweight (42 mg/cm3), porous CNT@TiO2 sponge with core-shell structure CNT/TiO2 was successfully prepared via a simple combination of hydrolysis and heat treatment method. In the sponge, the thickness and crystal structure of the TiO2 shell layer, and the mass fraction of TiO2 and CNTs can be precisely controlled by the growth processes, resulting in adjustable dielectric loss properties of the samples. With the optimized component proportion, it was found that a minimum reflection loss value of −31.8 dB was observed at 10.35 GHz, and reflection loss exceeds −10 dB is up to 2.76 GHz for the absorber with the thickness of 2 mm. Moreover, the effective microwave absorption (

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/65dcc7eaab78b98865d9b31c9ada3ffb0d4a1b5f