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Sulfur-doped wood-derived porous carbon for optimizing electromagnetic response performance
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-10 , DOI: 10.1039/d1nr04232g Haihua Hu 1 , Yixing Li 1 , Tong Gao 1 , Siyu Yan 1 , Shiting Wu 2 , Sateesh Bandaru 2 , Yun Zheng 1 , Gaowu Qin 1 , Xuefeng Zhang 1, 2
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-10 , DOI: 10.1039/d1nr04232g Haihua Hu 1 , Yixing Li 1 , Tong Gao 1 , Siyu Yan 1 , Shiting Wu 2 , Sateesh Bandaru 2 , Yun Zheng 1 , Gaowu Qin 1 , Xuefeng Zhang 1, 2
Affiliation
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Bio-mass materials have been selected as one of the advanced electromagnetic (EM) functional materials due to their natural porous framework for dynamically and flexibly optimizing the EM response property. Herein, we demonstrate sulfur-doped wood-derived porous carbon EM materials (SPC) for optimizing the EM response performance via the coupling between doped heterostructures and the original 3D microchannels. The experimental results reveal that both the dielectric loss capacity and interfacial impedance matching could be increased by the sulfur-doped heterostructures. By tailoring the sulfur content, the microwave absorption (normalized RLmin) of SPC could be optimized to −15.90 dB mm−1, while the effective absorption bandwidth (EABRL≤−10 dB) could cover the K band. Moreover, the shielding effectiveness of SPC can be enhanced from 10 dB to 30 dB with the assistance of water, ascribed to the super-wettability performance. This present study provides a novel strategy to further optimize the EM response performance of wood-derived materials, and meanwhile could be widely extended to other bio-mass absorbers.
中文翻译：
用于优化电磁响应性能的掺硫木衍生多孔碳
生物质材料因其天然的多孔骨架而被选为先进的电磁 (EM) 功能材料之一，可动态灵活地优化电磁响应特性。在此，我们展示了掺硫木衍生多孔碳电磁材料（SPC），用于通过掺杂异质结构和原始 3D 微通道之间的耦合来优化电磁响应性能。实验结果表明，掺硫异质结构可以提高介电损耗能力和界面阻抗匹配。通过调整硫含量，SPC的微波吸收（归一化 RL min）可以优化为 -15.90 dB mm -1，而有效吸收带宽（EAB RL≤-10 dB) 可以覆盖 K 波段。此外，由于具有超润湿性能，在水的帮助下，SPC 的屏蔽效果可以从 10 dB 提高到 30 dB。本研究为进一步优化木源材料的电磁响应性能提供了一种新策略，同时可以广泛扩展到其他生物质吸收剂。
更新日期：2021-09-22
中文翻译：
用于优化电磁响应性能的掺硫木衍生多孔碳
生物质材料因其天然的多孔骨架而被选为先进的电磁 (EM) 功能材料之一，可动态灵活地优化电磁响应特性。在此，我们展示了掺硫木衍生多孔碳电磁材料（SPC），用于通过掺杂异质结构和原始 3D 微通道之间的耦合来优化电磁响应性能。实验结果表明，掺硫异质结构可以提高介电损耗能力和界面阻抗匹配。通过调整硫含量，SPC的微波吸收（归一化 RL min）可以优化为 -15.90 dB mm -1，而有效吸收带宽（EAB RL≤-10 dB) 可以覆盖 K 波段。此外，由于具有超润湿性能，在水的帮助下，SPC 的屏蔽效果可以从 10 dB 提高到 30 dB。本研究为进一步优化木源材料的电磁响应性能提供了一种新策略，同时可以广泛扩展到其他生物质吸收剂。
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