三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo<sub>2</sub>C用于高性能电磁波吸收与耐腐蚀性研究

引用本文: 闫婧, 张泽楠, 马东威, 张昕怡, 叶卓栋, 陈雪芳. 三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo₂C用于高性能电磁波吸收与耐腐蚀性研究[J]. 物理化学学报, 2026, 42(9): 100328. doi: 10.1016/j.actphy.2026.100328 shu

Citation: Jing Yan, Zenan Zhang, Dongwei Ma, Xinyi Zhang, Zhuodong Ye, Xuefang Chen. Melamine-assisted topotactic transformation of MOFs into needle-like α-MoC/β-Mo₂C for high-performance electromagnetic wave absorption and corrosion resistance[J]. Acta Physico-Chimica Sinica, 2026, 42(9): 100328. doi: 10.1016/j.actphy.2026.100328 shu

三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo₂C用于高性能电磁波吸收与耐腐蚀性研究

闫婧 ^{1,
,} ,
张泽楠 ^1, ,
马东威 ^2, ,
张昕怡 ^1, ,
叶卓栋 ^1, ,
陈雪芳 ^{3,
,}

1.
西安工业大学材料与化工学院, 陕西西安 710021
2.
湖北汽车工业学院汽车材料学院, 湖北十堰 442002
3.
中国军事科学院防化研究院, 北京 102205

通讯作者: Email: yanjingyan212@163.com (闫婧); chenxfzns@163.com (陈雪芳)

摘要: 随着对宽带、轻质且耐腐蚀的优异电磁波吸收(EWA)材料需求日益增长，碳化钼基复合材料受到广泛关注。然而，单相碳化钼通常存在阻抗匹配不佳和介电损耗可调性受限的问题。本研究报道了一种三聚氰胺辅助的金属有机框架(MOFs)拓扑转化策略，制备出针状α-MoC/β-Mo₂C复合材料，兼具高性能EWA特性和耐腐蚀性。该策略中，三聚氰胺作为额外碳/氮源和结构导向剂，在热解过程中其分解释放的气体诱导双金属MOF前驱体(MoZn-BIFs)发生原位形貌重构，显著提升比表面积和孔隙结构，从而增强电磁波衰减与多重反射效应。通过系统优化前驱体与三聚氰胺质量比1:1及热解温度700 ℃，获得最优α-MoC/β-Mo₂C复合材料(记为MoC/Mo₂C-M₁₁T₇₀₀)。该材料具有独特的针状三维导电网络和丰富的多相界面，可有效促进界面极化与介电损耗。值得注意的是，在仅30 wt%填料负载和2.025 mm匹配厚度下，MoC/Mo₂C-M₁₁T₇₀₀实现-63.61 dB的最小反射损耗，其1–4 mm厚度范围内的总有效吸收带宽达12.61 GHz (覆盖5.39–18 GHz)，展现出卓越的宽带EWA性能。此外，材料还表现出良好的耐腐蚀性。本研究阐明了双相异质结构的形成机制及其对电磁参数的影响规律，为开发高性能、多功能碳化钼基吸波材料提供了可控的制备途径。

关键词:

English

Melamine-assisted topotactic transformation of MOFs into needle-like α-MoC/β-Mo₂C for high-performance electromagnetic wave absorption and corrosion resistance

Jing Yan ^{1,
,} ,
Zenan Zhang ^1, ,
Dongwei Ma ^2, ,
Xinyi Zhang ^1, ,
Zhuodong Ye ^1, ,
Xuefang Chen ^{3,
,}

1.
School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, Shaanxi Province, China
2.
School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China
3.
Chemical Defence Institute, Academy of Military Science, Beijing 102205, China

Corresponding author: Email: yanjingyan212@163.com (Jing Yan); chenxfzns@163.com (Xuefang Chen)

Received Date: 12 April 2026
Accepted Date: 20 May 2026
Revised Date: 17 May 2026
Available Online: 15 September 2026

Abstract: The growing demand for superior electromagnetic wave absorbing (EWA) materials with broad bandwidth, lightweight, as well as corrosion resistance has driven interest in molybdenum carbide-based composites. However, single-phase molybdenum carbides typically exhibit unsatisfactory impedance matching and restricted tunability of dielectric loss. Herein, we report a melamine-assisted topotactic transformation of metal-organic frameworks (MOFs) into needle-like α-MoC/β-Mo₂C composites for high-performance EWA and corrosion resistance. In this strategy, melamine serves as an additional carbon/nitrogen source and structure-directing agent. During pyrolysis, the gases released from melamine decomposition induce an in situ morphological reconstruction of the bimetallic MOF (MoZn-BIFs) precursor, significantly improving specific surface area and pore architecture, which promotes attenuation of electromagnetic waves and multiple reflections. By systematically optimizing the precursor-to-melamine mass ratio and pyrolysis temperature, we obtain the optimized α-MoC/β-Mo₂C composite (denoted MoC/Mo₂C-M₁₁T₇₀₀) at a mass ratio of 1 : 1 and a pyrolysis temperature of 700 ℃. This material exhibits a unique needle-like three-dimensional conductive network with abundant multiphase interfaces, effectively promoting interfacial polarization and dielectric loss. Remarkably, at a filler loading of only 30 wt% and a matching thickness of 2.025 mm, the MoC/Mo₂C-M₁₁T₇₀₀ achieves a minimum reflection loss (RL_min) of -63.61 dB. Its total effective absorption bandwidth over the thickness range of 1– 4 mm (EAB_total) is 12.61 GHz (covering 5.39–18 GHz), demonstrating excellent broadband EWA performance. Furthermore, the material shows good corrosion resistance. This work clarifies the mechanism behind the formation of the dual-phase heterostructure and its influence on electromagnetic parameters, providing a facile and controllable route for developing high-performance, multifunctional molybdenum carbide-based absorbers.

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo₂C用于高性能电磁波吸收与耐腐蚀性研究

通讯作者: Email: yanjingyan212@163.com (闫婧); chenxfzns@163.com (陈雪芳)

English

Melamine-assisted topotactic transformation of MOFs into needle-like α-MoC/β-Mo₂C for high-performance electromagnetic wave absorption and corrosion resistance

Corresponding author: Email: yanjingyan212@163.com (Jing Yan); chenxfzns@163.com (Xuefang Chen)

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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中国化学会秘书处

三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo2C用于高性能电磁波吸收与耐腐蚀性研究

通讯作者: Email: yanjingyan212@163.com (闫婧); chenxfzns@163.com (陈雪芳)

English

Melamine-assisted topotactic transformation of MOFs into needle-like α-MoC/β-Mo2C for high-performance electromagnetic wave absorption and corrosion resistance

Corresponding author: Email: yanjingyan212@163.com (Jing Yan); chenxfzns@163.com (Xuefang Chen)

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

三聚氰胺辅助MOFs拓扑定向转化为针状α-MoC/β-Mo₂C用于高性能电磁波吸收与耐腐蚀性研究

Melamine-assisted topotactic transformation of MOFs into needle-like α-MoC/β-Mo₂C for high-performance electromagnetic wave absorption and corrosion resistance

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs