High-performance Microwave Absorption Materials Research Articles

Hierarchical Fe3O4/Fe@C@MoS2 core-shell nanofibers for efficient microwave absorption

Designing one-dimensional (1D) magnetic-carbon composites microwave absorbers is a promising strategy that can meet the current demand for high-performance microwave absorption (MA) materials. In this work, hierarchical structured Fe3O4/Fe@C@MoS2 nanofibers were successfully obtained via a simple three-step method. 1D Fe3O4/Fe@C nanofibers were fabricated through electrospinning technology and in-situ polymerization followed by carbonization and reduction in H2/N2 atmosphere. MoS2 nanosheets grew irregularly on the surface of 1D Fe3O4/Fe@C nanofibers to form the flower-like structure. The morphology, composition and magnetism of samples were systematically investigated. Furthermore, electromagnetic characteristics and MA properties of Fe3O4/Fe@C nanofibers and Fe3O4/Fe@C@MoS2 nanofibers were compared. The minimum reflection loss (RLmin) of Fe3O4/Fe@C@MoS2 nanofibers could reach −53.79 dB at 11.12 GHz and the corresponding absorption bandwidth (RL < -10 dB) of 4.4 GHz was achieved at the absorber thickness of 2.24 mm. This work combines electrospinning technology with traditional chemical synthesis to prepare a novel 1D core-shell microwave absorber, which provides some inspiration for preparing MA material in the future.

Thin and temperature-resistant TiO2–Sr1−xLaxTiO3 (x = 0.1–0.3) composite ceramics for microwave absorption in the X-band

Recently, high-temperature stability is a challenge in a number of microwave absorption materials. Hence, researchers are still searching for a novel material system preferably with a high-temperature resistance to be applied in the field of microwave absorption. Here, in the current study, toward this aim, lanthanum (La)-doped strontium titanate (SrTiO3) blended with TiO2 were fabricated by hot-press sintering in a vacuum. The as-prepared samples are denoted as TiO2–Sr1−xLaxTiO3 with x varying from 0.1 to 0.3 in steps of 0.1. Scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), and microwave vector network analyzer were carried out to study their morphology, phase composition, structure, and electromagnetic and microwave absorption properties, respectively. It is revealed that the La atom was efficiently doped at the Sr-site in SrTiO3. Benefiting from the tunability of its dielectric and impedance properties, TiO2–Sr1−xLaxTiO3 can be utilized in a highly efficient way to absorb microwave radiations with a decent design. Results illustrated that TiO2–Sr1−xLaxTiO3 (x = 0.2) with a thickness of only 0.42 mm exhibits a high microwave absorption efficiency of −40.89 dB and can achieve a 2.82 GHz bandwidth of reflection loss value below −5 dB. Thus, TiO2–Sr1−xLaxTiO3 composites ceramics can be served as an opening opportunity for the application of high-temperature stability and tunable high-performance effectiveness microwave absorption materials in stealth technology and information security.

Yolk-shell structured Co@SiO2@Void@C nanocomposite with tunable cavity prepared by etching of SiO2 as high-efficiency microwave absorber

Nowadays, high-performance microwave absorption materials with light weight, strong absorbing intensity and wide absorption bandwidth are urgently demanded to solve the electromagnetic pollution issues. In this work, the yolk-shell structured Co@SiO2@Void@C nanocomposites with tunable cavity are obtained by etching SiO2 in the Co@SiO2@C nanoparticles. They exhibit better microwave absorption properties than the unetched counterpart. When the etching time is 6 h, the Co@SiO2@Void@C nanocomposite shows high absorption efficiency with a minimum reflection loss (RL) value of −44.5 dB at 8.8 GHz. Notably, its effective absorption bandwidth (RL < −10 dB) is as wide as 8.0 GHz (9.7–17.7 GHz) at a thin thickness of only 1.7 mm. The excellent microwave absorbing performances are attributed to the abundant heterointerfaces, well-controlled cavity, synergistic effects between magnetic and dielectric loss, and optimal impedance matching. Owing to the characteristics of strong absorbing capacity, ultrabroad absorption bandwidth and thin matching thickness, the yolk-shell structured Co@SiO2@Void@C nanocomposites are promising candidates as highly effective microwave absorbers.

Metal-organic framework derived hollow CoFe@C composites by the tunable chemical composition for efficient microwave absorption

Controlling the composition and microstructure of nanomaterials is still a significant challenge in developing high-performance microwave absorption (MA) materials. Herein, metal–organic framework (MOF)-derived hollow CoFe@C nanoboxes are designed and prepared through the facile regulating the mass ratios of ZIF-67/PFC and a thermal annealing treatment. The CoFe@C composite can achieve an excellent MA performance, which have two high reflection loss (RL) values at different thickness. A RL value of −31.0 dB is obtained at 11.84 GHz with a matching thickness of 2.4 mm, and a RL value can reach −44.1 dB (4.08 GHz) at a matching thickness of 5.8 mm, and a correspondingly wide absorbing bandwidth (5.20 GHz, from 9.7 to 14.9 GHz) is simultaneously obtained at a matching thickness of 2.3 mm. The magnetic loss, interfacial polarization and hollow structure are the main reasons for their excellent MA capability. This work provides a research idea for the development of the efficient MOF-based MA materials in practical application.

Facile preparation of aluminum nitride decorated multi-walled carbon nanotube for excellent microwave absorption

Designing high-performance microwave absorption materials become a prominent demand with the rapid development of information technology. In this work, needle-like morphology of aluminum nitride (AlN) decorated multi-walled carbon nanotubes (MWCNTs) as microwave absorbers has been successfully fabricated through a facile oil bath treatment. The MWCNTs/AlN composites exhibit outstanding microwave absorption performance with different content of MWCNTs, and the mass ratio of MWCNTs/AlN to paraffin is 2:3. The minimum reflection loss can reach to − 47.34 dB at 9.12 GHz when the absorber thickness is 2.9 mm and the effective absorption bandwidth is 3.28 GHz with the composites containing 7 wt% MWCNTs. More importantly, the lowest density of MWCNTs/AlN composites can reach 0.316 ± 0.0294 g/cm3, which is beneficial for practical applications. The significant improvement in microwave absorption properties of MWCNTs/AlN is major attributed to the enhancement of impedance matching, dielectric loss and multiple scattering by introducing different content of MWCNTs. This work might build an ideal to design novel lightweight, high-performance and broaden applications of microwave absorption materials, which can be widely used in practical fields under special conditions.

Recent progress of microwave absorption microspheres by magnetic-dielectric synergy.

Designing and developing high-performance microwave absorption (MA) materials for electromagnetic protection and radar detection have received widespread attention. Recently, magnetic-dielectric MA materials have become a research hotspot due to their unique complementary functions and synergy loss mechanism. Herein, we review important research progress of excellent MA systems combining strong magnetic components and dielectric substrates. The functional materials involve magnetic materials, carbon components, semiconductors, polymer and so on. For a comprehensive analysis, current development and challenges are firstly introduced in the background. Modern requirements for microwave energy conversion are elaborated in the following part. To highlight the key points, more attention has been paid to the magnetic-dielectric synergy microsphere: (i) core/yolk-shell structure, (ii) multi-component assembly and (iii) MOF-derived synergy composites. Meanwhile, classical and typical high-performance MA composites with a multi-loss mechanism are also mentioned in this review paper. Finally, the design principles, electromagnetic synergy, future mechanism exploration and device application are presented, which provides guidance for understanding MA materials.

The recent progress of MXene-Based microwave absorption materials

The development of advanced microwave absorption materials (MAMs) is a considerably important topic because our living environment is full of electromagnetic wave pollution which threatens people’s health. And MAMs are also used in radar stealth technologies for preventing the weapons from being detected. Based on the importance of MAMs in both military and civil fields, many nanomaterials have been studied as MAMs, but not all of them have the satisfactory performance. MXene, a new family of two-dimensional (2D) material, has the favorable structures and properties such as special layered structure, abundant functional groups, high electrical conductivity and high specific surface area, which make it an appropriate candidate as high-performance MAMs. In this review, we summarized the features of MXene, the theories of microwave absorption (MA) and the latest progress of MXene and MXene-based composites as MAMs. Through the summary of MXene and MXene-based composites, the advantages and shortcomings of the MXene-based composites as high performance MAMs are presented. Moreover, the future research direction of MXene and MXene-based MAMs also has been discussed in detail.

Ultralow-density carbon foam composites with bean-like Co-embedded carbon nanotube whiskers towards high-performance microwave absorption

We describe the design and fabrication of an ultralight carbon foam composite with special bean-like Co-embedded carbon nanotube whiskers used for high-performance microwave absorption materials. A facile approach was developed to create this carbon foam with the self-growth of carbon nanotubes on low-cost cobalt-decorated commercial melamine sponges (MF) via a simple thermal annealing process. It was found that a large number of bean-like carbon nanotubes whiskers (1D) embedded with Co nanoparticles (0D) grew on the surface of carbon skeleton (3D) under the action of surface autocatalysis. This unique hierarchical micro/nanostructure not only reduced the density of the materials but also effectively improved their thermal oxidation stability and microwave absorption ability. The resultant foam showed an excellent microwave absorption performance with the combined advantages of ultralow density (9.4 mg/cm3), strong absorption (minimum reflection loss value of −46.2 dB), wide absorption width (4.8 GHz), and high thermal oxidation stability (>350 °C). The RL values of the foam could be all below −10 dB at the frequency from 4 to 18 GHz covering 87% of the whole test frequency range. These remarkable results also provide a potentially scalable, simple, and cost-effective strategy for designing metal-embedded carbon composite nanostructures for catalysis, electrochemistry, and other applications.

Spider web-like carbonized bacterial cellulose/MoSe2 nanocomposite with enhanced microwave attenuation performance and tunable absorption bands

It is essential to manufacture microwave absorbers with strong absorption as well as tunable absorption bands at a low filler content. However, it remains challenging for pure biomass material to reach this goal without loading other components. MoSe2, as a transition metal chalcogenide with semiconductor properties, has emerged as a potential microwave absorber filler. Herein, bacterial cellulose (BC)-derived carbon nanofibers/MoSe2 nanocomposite was fabricated and phosphoric acid was used to dope phosphorus in BC, in which MoSe2 microspheres were dropped on the BC network like a dew-covered spider web. This unique network structure enhances conductive loss and multiple reflections of the incident wave. The collocation of BC and MoSe2 is helpful to impedance match and introduces interfacial/dipolar polarization loss; moreover, the P-doping of BC helps to tune the absorption bands. Overall, the optimal reflection loss of undoped one reaches −53.33 dB with only 20 wt.% filler content, whose main absorption peaks focus on X-band. Interestingly, after the P-doping of BC, the main absorption peaks move to Ku-band and the optimal reflection loss gets stronger (−66.84 dB) with the same filler loading. Strong absorption and tunable absorption bands can be realized, and thus wide frequency range is covered. This work is expected to enlighten future exploration of biomass carbon materials on high-performance microwave absorption materials.

Excellent microwave absorption performance from matched magnetic-dielectric properties of LSMO@RGO Nanocomposites

Lightweight and ultrabroad electromagnetic wave absorption materials are urgently demanded to address electromagnetic (EM) interference or pollution. However, the design of excellent EM wave absorbents still remains a challenge. Herein, La0.7Sr0.3MnO3/reduced graphene oxide (LSMO@RGO) nanocomposites was successfully prepared by a facial two-step method. Three different radios of LSM to RGO (1:2, 1:1, 2:1) and four different addition (3%, 5%, 8%, 10%) for each radio were investigated, and the matched magnetic-dielectric properties of LSMO@RGO nanocomposites endows the excellent microwave absorption performance. The maximum reflection loss of LSMO@RGO nanocomposites reach as strong as −45.71 dB at a 16.47 GHz with a thickness of 2.4 mm with the addition of 5 wt.%. The ultrabroad effective absorption bandwidth of LSMO@RGO nanocomposites also can reach 7.31 GHz with a thickness of 2.8 mm. The excellent microwave absorption performance is mainly originated from the magnetic and dielectric losses as well as well-matched impedance matching. The excellent microwave absorption performance of LSMO@RGO nanocomposites especially for ultrabroad effective absorption bandwidth offer strong potentials for the design of high-performance microwave absorption materials. The material system of LSM and graphene composite was prepared for the first time, the EM absorbing properties were investigated, and this material with simple preparation process, broadband and high absorption is highly expected to be industrialized.

Highly sensitive, robust and anisotropic MXene aerogels for efficient broadband microwave absorption

The increasingly severe electromagnetic pollution calls for high-performance microwave absorption materials. Lightweight, robust and porous MXene/polyimide (MP) aerogels with reversible compressibility, anisotropic pressure sensitivity and microwave absorption performances are fabricated by interface-reinforcement and bidirectional-freezing approach. The interfaces between MXene sheets are effectively reinforced by incorporated polyimide while anisotropic wave-like lamellar architectures are constructed during the bidirectional-freezing process due to the generated dual temperature-gradients. The highly anisotropic aerogel exhibits obvious higher mechanical strength and electrical conductivity along the lamella direction, but better elasticity and less energy dissipation in the normal direction. The reversibly compressible porous MP architecture not only delivers steady and repeatable electrical resistance response, but also presents long-term discernible direction-dependent pressure sensitivity for 1000 loading-release cycles at a strain of 50%. The anisotropic and porous architecture benefits microwave absorption. The structure optimization yields tunable effective absorption bandwidth (EAB) in a range of 3.9–18 GHz. Particularly, the MP aerogel shows the best EAB of 6.5 GHz for reported MXene-based microwave absorbers at only 1.91 mm, and the EAB covers the whole X-band for an aerogel with a thickness of 2.57 mm. These promising characteristics make the interfacially reinforced anisotropic MXene aerogels applicable for wearable piezoresistive devices and microwave absorbing materials.

Hierarchical Ti3C2Tx MXene/Ni Chain/ZnO Array Hybrid Nanostructures on Cotton Fabric for Durable Self-Cleaning and Enhanced Microwave Absorption.

The increasing demand for wearable electronics and the intensification of electromagnetic pollution have boosted the exploration of high-performance flexible microwave absorption (MA) materials. Herein, the hierarchical Ti3C2Tx MXene/Ni chain/ZnO array hybrid nanostructures are rationally constructed on cotton fabric for acquiring enhanced MA performance and durable self-cleaning ability. Based on the high dielectric loss capacity of MXenes and ZnO arrays, by controlling dip-coating numbers of Ni chains, the magnetic loss can be manipulated to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB, the bandwidth of RL < -10 dB). The minimum RL value of the designed fabric can reach -35.1 dB at 8.3 GHz with a thickness of 2.8 mm, and its EAB can cover the whole X-band with only a 2.2 mm thickness. In addition, the designed fabric also exhibits superior liquid repellency and durable self-cleaning ability due to the combination of the hybrid nanostructures and a superhydrophobic coating. This work provides an insight for rational design of textile-based MA materials, showing potential applications in flexible and wearable functional electronics.

Rational construction of hierarchical accordion-like Ni@porous carbon nanocomposites derived from metal-organic frameworks with enhanced microwave absorption

Development of high-performance microwave absorption materials with a thin matching thickness, wide effective absorption bandwidth, low filler loading, and strong absorption capacity has attracted extensive scientific and technological interest and it remains a huge challenge. Here, hierarchical accordion-like Ni@porous carbon (Ni@C) nanocomposites derived from metal-organic frameworks were rationally designed and successfully developed as enhanced microwave absorption materials. It was found that the well-tuned composition (Ni, C and CNTs) and structure (laminated, porous, and core-shell characteristics) of the resultant nanocomposites led to the variation of magnetic properties, graphitization degree, and electromagnetic parameters. As expected, the hierarchical accordion-like Ni@C nanocomposites with a low filler loading of 25 wt% achieved a broad effective absorption bandwidth of 6.6 GHz, a strong reflection loss of −86.9 dB with a thin thickness of 1.8 mm through the optimization of impedance matching and improvement of microwave attenuation ability. The enhanced microwave absorption was attributed to the loss synergistic effect between abundant interfacial and dipole polarization in the hierarchical architecture, to the electronic transport in the three-dimensional conductive network, and to strong magnetic coupling in Ni nanoparticles. Therefore, this work presented a tailored strategy for the development of novel hierarchical nanocomposites as enhanced microwave absorption materials.

Self-assembled reduced graphene oxide/nickel nanofibers with hierarchical core-shell structure for enhanced electromagnetic wave absorption

In this study, self-assembled three-dimensional (3D) reduced graphene oxide/nickel (rGO/Ni) nanofibers with hierarchical core-shell structure and vertically aligned graphene edge planes are synthesized as an efficient microwave absorption material. Electromagnetic multifunctional Ni chains form the skeleton of 3D nanofibers, and 2D rGO nanosheets are wrapped around the 1D Ni chain to form 3D rGO/Ni nanofibers via electrostatic self-assembly combined with a reduction method. Compared with the pristine Ni chain or rGO sheet, the unique vertically aligned graphene edge plane gives the 3D rGO/Ni nanofiber a much larger specific surface area and interlaced area between the 3D nanofibers. The hierarchical core-shell structure also provides abundant interfaces between the rGO and Ni chains, giving the 3D rGO/Ni nanofibers effective interfacial polarization loss. As a result, the 3D rGO/Ni nanofibers exhibit excellent microwave absorption properties. At a thickness of 2 mm, the minimum reflection loss of the nanofibers with only 15 wt% loading in paraffin reaches −50.52 dB, and the effective absorption bandwidth achieves 4.2 GHz. Moreover, the 3D rGO/Ni nanofibers also exhibit excellent dispersibility because of their special edge plane structure. This work provides an effective strategy for designing high-performance microwave absorption materials and is promising for applications in efficient electronics protection.

Controllable synthesis and microwave absorption properties of Fe3O4@f-GNPs nanocomposites

The development of high efficiency electromagnetic wave absorbing material is beneficial to eliminate secondary microwave pollution caused by strong reflection of electromagnetic shielding material. In this paper, we report a facile solvothermal method for preparing a magnetic Fe3O4@ functionalized graphene nanoplates (f-GNPs) hybrid material by assembling spherical Fe3O4 particles with integrity crystal on the surface of graphene sheet. The experimental results revealed Fe3O4@f-GNPs composites had better wave absorption performance than dielectric f-GNPs or magnetic Fe3O4 because of impedance matching ability. Electromagnetic parameters and wave absorbing properties can be controlled by regulating the particle diameter. Fe3O4@f-GNPs composites dominate their good microwave absorbing performances including the minimum reflection loss (RL) value of −25 dB at a frequency of 10 GHz with a sample thickness of 2 mm and an effective absorption bandwidth of 2.4 GHz (below −10 dB). Moreover, The Fe3O4@f-GNPs with 232 nm Fe3O4 exhibited shielding efficiency properties in the X band. Its absorption efficiency and total efficiency were about 32 dB and 25 dB, respectively. The nanohybrids are very promising for improving and expanding the application of the high-performance microwave absorption materials.

Rational construction and microwave absorption properties of porous FeOX/Fe/C composites

To satisfy the growing demand for military and civil applications, it is necessary to develop high-efficiency microwave-absorbing materials. Herein, a pyrolysis process was developed to construct FeOx/Fe/C composites using filter papers saturated with ferric nitrate solution as the precursor. The three-dimensional textures of filter paper are well maintained during the pyrolysis process. Ferric nitrate is decomposed to Fe2O3 and subsequently reduced to Fe3O4 and Fe nanoparticles embedded in the carbon matrix via carbothermal reduction. Various gases produced during the pyrolysis process create foam and generate additional nanoscale pores in the carbon matrix. The chemical composition and structure of composites can be tailored by controlling the pyrolysis conditions. The microwave absorption properties of FeOx/Fe/C composites are closely related to the chemical composition and structure. The optimized product shows excellent microwave absorption properties: The strongest reflection loss (RL) is −37 dB at ∼12 GHz; the effective absorption bandwidth (RL < −10 dB) is 6.5 GHz with a thickness of 2.0 mm. The superior absorption properties of the optimized product can be ascribed to the synergies of multiple chemical components, hierarchically porous structures and abundant interfaces. This study also suggests a large-scale synthesis strategy for high-yield carbon-coated magnetic nanoparticles for high-performance microwave absorption materials.

Precursor infiltration and pyrolysis cycle-dependent microwave absorption and mechanical properties of lightweight and antioxidant carbon fiber felts reinforced silicon oxycarbide composites

High-performance microwave absorption materials combined with good oxidation resistance and mechanical properties are highly desirable in some extreme situations. Herein, three-dimensional (3D) needled carbon fiber felts reinforced silicon oxycarbide (SiOC/CFs) composites with excellent electromagnetic (EM) wave absorption, good oxidation resistance and mechanical properties were successfully prepared through a simple precursor infiltration and pyrolysis (PIP) process. Notably, the EM wave absorption, oxidation resistance and mechanical performances strongly depend on the PIP cycles through adjusting the content of SiOC to control the porosity and density of the composites. A substantial enhancement of EM wave absorption performance of composites is achieved via incorporation of SiOC with different PIP cycles, resulting from the matched characteristic impedance and enhanced loss ability. The minimum reflection loss (RLmin) of pure carbon fiber felts is −8.4 dB, whose value is decreased to −62.9 dB for the composites with 1 PIP cycle, and to −49.9 dB for the composites with 2 PIP cycles, respectively. The results indicate that the as-prepared SiOC/CFs composites with superior EM wave absorption, great oxidation resistance and mechanical properties could be considered as a great potential for the applications in harsh environments.

Outstanding comprehensive performance versus facile synthesis: Constructing core and shell-interchangeable nanocomposites as microwave absorber

It is still a great challenge to develop high-performance microwave absorption materials (MAMs). Herein, we first proved the excellent synergistic effect of Fe3O4/MoS2 heterostructure based on the theoretical calculations. To effectively utilize the synergistic effect and morphology, core and shell-interchangeable Fe3O4@MoS2 and MoS2@Fe3O4 nanocomposites (NCs) were elaborately constructed. By controlling the hydrothermal temperature, different MoS2 morphologies and contents of Fe3O4@MoS2 NCs were produced, which simultaneously displayed the optimal reflection loss (RL) values (~−50 dB), broad absorption bandwidth (⩾5.0GHz) and high chemical stabilities. With the synthesis temperature increasing from 170 °C to 200 °C, their outstanding microwave absorption (MA) capabilities moved towards the high frequency region and thin matching thickness. Impressively, the Fe3O4@MoS2 obtained at 200 °C presented a minimum RL value of −50.75 dB with the thickness of 2.90 mm and an absorption bandwidth of 5.0 GHz with the thickness of 1.71 mm, and the excellent MA capabilities (RL values <−30 dB) with the low matching thicknesses (<2 mm) could be observed in the frequency range of X and Ku bands. Moreover, compared to the reverse structure MoS2@Fe3O4, the core@shell structure Fe3O4@MoS2 exhibited evidently superior MA comprehensive properties in terms of low optimal RL value, broad absorption bandwidth and high chemical stability, which could be ascribed to the improved impedance matching and microwave attenuation characteristics. Generally, the proposed flower-like core@shell structure Fe3O4@MoS2 NCs presented very extraordinary MA comprehensive properties, which were very attractive candidates for high-performance MAMs.

Dandelion-like carbon nanotube assembly embedded with closely separated Co nanoparticles for high-performance microwave absorption materials.

Enhancing the magnetic loss capacity by microstructure design remains a considerable challenge in the microwave absorption field. Herein, a high-performance microwave absorbent is developed by dispersing a considerable amount of magnetic nanoparticles within the dandelion-like carbon nanotube assembly. A controllable fabrication method is further exploited to adjust the distribution feature of these embedded nanomagnets. In such a hierarchical composite, parts of the interaction network among the coupled closely spaced nanomagnets can be frequently broken and rebuilt to intensively dissipate the microwave energy, which is confirmed by electron holography and micromagnetic simulation for the first time. By virtue of this dynamic magnetic coupling network mechanism, the hierarchical C/Co composite acquires the first-rate microwave absorption performance. The maximum reflection loss value reaches as much as -52.9 dB (absorbance >0.99999) and the effective absorption bandwidth (absorbance >0.9) occupies the entire X band. It is believed that the above insightful mechanism provides a new opportunity to lower the density of the magnet-based microwave absorbent as much as possible. Besides, the unique method for dispersing magnetic nanoparticles also broadens the pathway to assemble the hierarchical architecture.

Porous carbon materials based on MOFs in microwave absorbing

With the rapid development of science and technology, especially the fast progress in the radar detection technology, lots of efforts have been made to obtain high performance microwave absorption materials. In recent years, carbon-based microwave absorption materials have received much attention because of their high-performance electromagnetic wave absorption performances, special microstructure and low density. However, they do not own an orderly structure, usually, and the impedance mismatching between carbon and air may hinder the incident electromagnetic waves enter into the microwave absorption materials and weaken its absorbing performance. Metal-organic frameworks (MOFs) has become a research hotspot almost in every filed of material chemistry due to its orderly structure, functional designability, etc. But the stability of MOFs is generally lower than the traditional porous materials. Under high temperature conditions, the structure may collapse in some extent. MOFs are often used as precursors to obtain target materials. After pyrolysis, porous carbon (NPC) and composite materials with relatively regular structure, a high specific surface area and a certain pore structure can be obtained, which is convenient for incorporating other materials with different loss mechanism in the NPC. At the same time, the carbonized NPC could be optimized to achieve good chemical stability, light weight, strong electromagnetic attenuation capability, and show excellent microwave absorption performance. In this paper, the properties of nanoporous carbon microwave absorption materials based on MOFs and their relationship between pore size and pore structure are discussed. Appropriate porosity provides a channel for EM waves to enter the microwave absorption materials, which helps to improve the impedance matching between electromagnetic waves and absorbers, thereby increasing the absorbing properties. The sizes and pore structures of the porous carbon microwave absorption materials also have an important effect on the interaction between the electromagnetic waves and the microwave absorption body. Three methods for synthesizing porous carbon of derived from MOFs are described, the advantages and disadvantages of these three methods are also analyzed. One is the one-step pyrolysis of MOFs for synthesis of porous carbons. The other is that the porous carbon obtained by pyrolysis of MOFs is recombined with different materials to carry on secondary calcination. The third method is introducing different nanoparticles into the micropores of MOFs before calcination, and then calcinating them together to prepare porous carbon composite microwave absorption materials. Previous studies show that the smaller the pore size, the more uniform the distribution, and the better the absorbing properties of the composite materials would be obtained. Porous carbon materials with different pore structures provide various propagation paths for electromagnetic waves to reflect and scatter in materials, resulting in different energy losses. The research status of microwave absorption of porous carbon materials based on magnetic metal MOFs, heteronuclear metal MOFs and non-magnetic metal MOFs are reviewed respectively. The microwave absorption mechanism of the porous carbon materials based on different metals MOFs examples or their influences on microwave absorption are also discussed. Porous carbon materials based on magnetic MOFs can improve the microwave absorbing properties by increasing the magnetic losses, and those based on heteronuclear MOFs combine the advantages of two or more materials, impart new chemical and physical properties to the materials and obtain high microwave absorption efficiency. The non-magnetic MOFs are carbonized to obtain non-magnetic metal oxide with low dielectric constant and their porous carbon composite materials, which could achieve excellent absorbing performance by improving impedance matching. Finally, the development trend of this kind of novel excellent absorption materials based on MOFs, with the advantages of strong loss, broad frequency bandwidth, thin thickness and lightweight, in the direction of diversification, compounding, lightweight and industrialization are prospected.