Construction of hierarchical SnO₂@SnS₂ nanostructures on carbon cloth as advanced microwave absorbers

Carbon cloth-based electromagnetic wave (EMW) absorbing materials have been widely studied due to their advantages of light weight, flexibility and high strength. At present, researchers widely use chemical in-situ growth method to construct secondary components on the surface of fibers to adjust the EMW absorption properties of carbon cloth (CC). However, there is still a lack of theoretical support behind this behavior. Herein, SnO2@SnS2 was used as the secondary component, and SnO2@SnS2 was constructed on the surface of CC by physical mixing (PM) and chemical in-situ (IS) growth, and the influence of the interface construction method on the microwave absorption performance of CC composites was studied. It is found that compared with SnO2@SnS2/CC-PM, SnO2@SnS2/CC-IS can more effectively adjust electromagnetic parameters, enhance multiple polarization, and enhance EMW loss. This can be attributed to the fact that the heterointerface between the secondary component constructed by chemical in-situ growth and the CC (SnO2@SnS2/CC) contributes much more to the EMW absorption than the intrinsic heterostructure in the secondary component (SnO2/SnS2). It is proved that chemical in-situ growth is a more effective strategy to construct high-performance EMW absorbing materials. Provide research theoretical support for the development of high-performance CC composites.