花状Zn-MOF衍生碳@MoS2复合材料制备及吸波性能
Preparation and wave-absorbing properties of flower-like Zn-MOF-derived carbon@MoS2 composites
作者单位E-mail
王飞翔 上海工程技术大学纺织服装学院, 上海 201620  
沈勇 上海工程技术大学纺织服装学院, 上海 201620 shenyong@sues.edu.cn 
潘虹 上海工程技术大学纺织服装学院, 上海 201620  
徐丽慧 上海工程技术大学纺织服装学院, 上海 201620  
摘要: 采用Zn-MOF (MOF为金属有机骨架)制备纳米多孔碳材料,通过自组装法将多孔碳与花状MoS2结合,制备出具有规整有序结构的花状Zn-MOF衍生碳@MoS2复合吸波材料。基于Zn-MOF衍生纳米多孔碳的高孔隙率、大比表面积,MoS2的花状结构引起的电磁波多次反射和散射,以及MoS2和Zn-MOF衍生碳之间存在的强极化效应、良好的阻抗匹配和协同作用,Zn-MOF衍生碳@MoS2在频率为9.28 GHz时的最佳反射损耗达到-49.68 dB,表现出优异的电磁波吸收性能。
关键词: 电磁波吸收  Zn-MOF衍生碳  花状MoS2  复合材料
基金项目: 上海市自然科学基金项目面上项目(No.21ZR1426200)和国家自然科学基金项目(No.51703123)资助。
Abstract: The polyhedral structure of Zn-MOF (MOF:metal-organic framework) was synthesized by the coordination of zinc nitrate hexahydrate and 2-methylimidazole. The Zn-MOF was calcined at high temperatures in a nitrogen atmosphere to prepare nanoporous carbon materials. In the process of preparation of flower-like MoS2 by solvothermal reaction, the Zn-MOF-derived nanoporous carbon was introduced and combined with flower-like MoS2 through self-assembly to prepare flower-like Zn-MOF-derived carbon@MoS2 composite absorbing material with regular and ordered structure. A series of characterization and performance tests were carried out to study the physical properties and absorbing properties of the composites. The particle size of polyhedral Zn-MOF-derived nanoporous carbon was 80 nm and encased in 1 μm flower-like MoS2. With the increase of the amount of Zn-MOF-derived carbon, the electromagnetic wave absorption performance of the flower-like Zn-MOF-derived carbon@MoS2 composites firstly increased and then decreased. Based on the high porosity and large specific surface area of Zn-MOF-derived porous carbon and the flower-like structure of MoS2, the electromagnetic wave was reflected and scattered many times, and there was a strong polarization effect, good impedance matching, and synergistic effect between MoS2 and Zn-MOF-derived carbon. When the additional amount (mass fraction) of flower-like Zn-MOF-derived carbon@MoS2 in paraffin was 25%, the frequency was 9.28 GHz, the matching thickness was 3 mm, and the effective absorption bandwidth was 3.04 GHz, the optimal reflection loss reached-49.68 dB, showing excellent electromagnetic wave absorption performance.
Keywords: electromagnetic wave absorption  Zn-MOF-derived carbon  flower MoS2  composite materials
投稿时间:2022-10-24 修订日期:2023-03-15
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王飞翔,沈勇,潘虹,徐丽慧.花状Zn-MOF衍生碳@MoS2复合材料制备及吸波性能[J].无机化学学报,2023,39(5):830-840.
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