Synthesis of TiO2/MWCNTs nanocomposites by click chemistry and its microwave absorption properties

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2024-07-29 DOI:10.1007/s12034-024-03250-z

Xiaoli Ji, Qianqian Ma, Jian Liu, Haoze Yuan, Xukai Ma

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Abstract

Titanium dioxide/multi-walled carbon nanotubes (TiO₂/MWCNTs) are nanocomposites (NCs) prepared via click reaction of TiO₂ nanoparticles (TiO₂ NPs) with azide groups (TiO₂–N₃) on the surface and MWCNTs with alkynyl groups (MWCNTs–ALK) on the surface. The phase structure, graphitization degree, structure, elemental composition, the microstructure of TiO₂/MWCNTs NCs were characterized by XRD, Raman, IR, XPS and SEM, and their electromagnetic (EM) parameters were determined by the vector network analyser. For TiO₂/MWCNTs NCs with click reaction, the minimum reflection loss (RL_min) is up to −47.87 dB at 12.02 GHz, the matching thickness is 2.0 mm, and the bandwidth is lower than −10 dB in the range of 7.7–12.48 GHz. Compared with the physically mixed TiO₂/MWCNTs composites, TiO₂/MWCNTs NCs prepared by click reaction show more excellent EM absorption properties, which is mainly due to the binding of covalent bonds between the two kinds of materials that lead to the enhancement of interfacial effects, the improvement of impedance matching and the increase of electron migration.

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点击化学法合成 TiO2/MWCNTs 纳米复合材料及其微波吸收特性

二氧化钛/多壁碳纳米管（TiO2/MWCNTs）是由表面带有叠氮基团（TiO2-N3）的二氧化钛纳米颗粒（TiO2 NPs）和表面带有炔基（MWCNTs-ALK）的多壁碳纳米管（MWCNTs）通过点击反应制备的纳米复合材料（NCs）。通过 XRD、拉曼、红外、XPS 和扫描电镜表征了 TiO2/MWCNTs NCs 的相结构、石墨化程度、结构、元素组成和微观结构，并通过矢量网络分析仪测定了其电磁（EM）参数。点击反应的 TiO2/MWCNTs NCs 在 12.02 GHz 时的最小反射损耗（RLmin）高达 -47.87 dB，匹配厚度为 2.0 mm，带宽在 7.7-12.48 GHz 范围内低于 -10 dB。与物理混合 TiO2/MWCNTs 复合材料相比，点击反应制备的 TiO2/MWCNTs NCs 表现出更优异的电磁吸收性能，这主要是由于两种材料之间共价键的结合增强了界面效应，改善了阻抗匹配，增加了电子迁移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.