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Controllable preparation of 2D carbon paper modified with flower-like WS2 for efficient microwave absorption
Dalton Transactions ( IF 3.5 ) Pub Date : 2023-02-06 , DOI: 10.1039/d2dt03137j Hao Chen 1, 2 , Zhengjian Xu 2 , Yuming Zhou 2 , Meiyun Zhang 1 , Shuangjiang Feng 2 , Xiaohai Bu 3 , Zewu Zhang 3 , Man He 2
Dalton Transactions ( IF 3.5 ) Pub Date : 2023-02-06 , DOI: 10.1039/d2dt03137j Hao Chen 1, 2 , Zhengjian Xu 2 , Yuming Zhou 2 , Meiyun Zhang 1 , Shuangjiang Feng 2 , Xiaohai Bu 3 , Zewu Zhang 3 , Man He 2
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In the practical application of microwave absorbing materials, traditional powder materials need to be mixed with the matrix to fabricate composite coatings. However, the complex preparation process of composite coatings and the uneven dispersion of powders in the matrix limit their application. To solve these problems, two-dimensional (2D) F-WS2/CP composite films were prepared by using carbon paper (CP) as a dispersion matrix and loading flower-like WS2 on its surface through a simple hydrothermal method. The morphology and microwave absorption (MA) performance of the composite films are easily regulated by adjusting the amount of reaction precursors. The combination of WS2 and CP facilitates impedance matching and improves the electromagnetic wave attenuation performance based on the synergistic effect of different loss mechanisms including multiple reflections and scattering, interfacial polarization, dipolar polarization, and conduction loss. At a low filler content (5 wt%), the maximum reflection loss (RL) of the composite film is up to −50 dB (99.999% energy absorption) at 12.5 GHz with 2.8 mm thickness. Moreover, at a relatively thin 1.8 mm thickness, its maximum RL remains −35 dB (>99.9% energy absorption). The as-prepared composite film shows excellent MA properties at a thinner thickness and lower filling content, providing inspiration for the preparation of light weight and efficient 2D thin-film microwave absorbers in the future.
中文翻译：
可控制备花状 WS2 改性二维复写纸以高效吸收微波
在微波吸收材料的实际应用中，传统的粉体材料需要与基体混合制备复合涂层。但复合涂层制备过程复杂，粉体在基体中分散不均，限制了其应用。为了解决这些问题，采用复写纸 (CP) 作为分散基体，通过简单的水热法在其表面负载花状 WS 2 ，制备了二维 (2D) F-WS 2 /CP 复合薄膜。复合膜的形貌和微波吸收（MA）性能很容易通过调节反应前体的量来调节。WS 2的组合CP基于多次反射和散射、界面极化、偶极化和传导损耗等不同损耗机制的协同作用，促进阻抗匹配，提高电磁波衰减性能。在低填料含量 (5 wt%) 下，复合薄膜的最大反射损耗 (RL) 在 12.5 GHz 和 2.8 mm 厚度下高达 −50 dB（99.999% 能量吸收）。此外，在相对较薄的 1.8 mm 厚度下，其最大 RL 保持为 −35 dB（>99.9% 的能量吸收）。所制备的复合薄膜在更薄的厚度和更低的填充含量下表现出优异的 MA 性能，为未来制备轻质高效的二维薄膜微波吸收器提供了灵感。
更新日期：2023-02-06
中文翻译：
可控制备花状 WS2 改性二维复写纸以高效吸收微波
在微波吸收材料的实际应用中，传统的粉体材料需要与基体混合制备复合涂层。但复合涂层制备过程复杂，粉体在基体中分散不均，限制了其应用。为了解决这些问题，采用复写纸 (CP) 作为分散基体，通过简单的水热法在其表面负载花状 WS 2 ，制备了二维 (2D) F-WS 2 /CP 复合薄膜。复合膜的形貌和微波吸收（MA）性能很容易通过调节反应前体的量来调节。WS 2的组合CP基于多次反射和散射、界面极化、偶极化和传导损耗等不同损耗机制的协同作用，促进阻抗匹配，提高电磁波衰减性能。在低填料含量 (5 wt%) 下，复合薄膜的最大反射损耗 (RL) 在 12.5 GHz 和 2.8 mm 厚度下高达 −50 dB（99.999% 能量吸收）。此外，在相对较薄的 1.8 mm 厚度下，其最大 RL 保持为 −35 dB（>99.9% 的能量吸收）。所制备的复合薄膜在更薄的厚度和更低的填充含量下表现出优异的 MA 性能，为未来制备轻质高效的二维薄膜微波吸收器提供了灵感。
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