Guo Shaoli, Wen Junqing, Song Lina, Qu Jinfeng, He Wanlin, Liu Shuai
School of Science, Xi'an Shiyou University, Xi'an, 710072, Shaanxi, People's Republic of China.
Nanotechnology. 2020 May 29;31(22):225606. doi: 10.1088/1361-6528/ab7534. Epub 2020 Feb 11.
Based on in situ intercalation polymerization of aniline, a one-step synthesis of a graphene/Ag@PANI ternary composite is proposed. The results show that together with sunlight exposure, Ag induces the polymerization of aniline accompanied by self-reduction to form a Ag@PANI core-shell nanostructure, and consequently, exfoliates the graphite sheet into graphene. Through a PANI shell, Ag@PANI nanoparticles all anchor onto the surface of graphene, forming a stable ternary structure. The performance of graphene/Ag@PANI is closely related to its micro-morphology, which depends on the selected Ag/aniline ratio during the synthesis. Double-layer absorbers with graphene/Ag@PANI as the absorbing layer present excellent absorption performance. The effective absorbing bandwidths of DB-10, DB-5, and DB-1 all exceed 3 GHz with a thickness of 1 mm and the reflection loss of 1.3 mm DB-10 reaches -44.5 dB at 10.5 GHz. The as-proposed facile and eco-friendly preparation of a graphene-based ternary composite is also of great significance for sensors, supercapacitor electronics, degradation of polymers, and other applications.
基于苯胺的原位插层聚合，提出了一种一步合成石墨烯/Ag@聚苯胺三元复合材料的方法。结果表明，在光照条件下，Ag引发苯胺聚合并伴随自身还原，形成Ag@聚苯胺核壳纳米结构，进而将石墨片层剥离成石墨烯。通过聚苯胺壳层，Ag@聚苯胺纳米颗粒均锚定在石墨烯表面，形成稳定的三元结构。石墨烯/Ag@聚苯胺的性能与其微观形貌密切相关，而微观形貌取决于合成过程中所选的Ag/苯胺比例。以石墨烯/Ag@聚苯胺为吸收层的双层吸收体具有优异的吸收性能。DB-10、DB-5和DB-1在厚度为1 mm时的有效吸收带宽均超过3 GHz，1.3 mm厚的DB-10在10.5 GHz时的反射损耗达到-44.5 dB。所提出的基于石墨烯的三元复合材料的简便且环保的制备方法对于传感器、超级电容器电子器件、聚合物降解及其他应用也具有重要意义。
