Unique Porous Architecture Research Articles

Solar vapor generator: A natural all-in-one 3D system derived from cattail

Solar-driven interfacial water evaporation is a promising strategy to produce fresh water by effectively converting abundant solar energy into localized heat. In this work, a natural all-in-one three-dimensional (3D) solar vapor generator (SVG) with low-cost and large-scale production based on Cattail (CT) has been proposed. The simple carbonized CT (CCT) as a photothermal material (PM) to construct the 3D SVG exhibited outstanding steam vapor generation performance due to its unique hierarchical porous architecture, rapid water transportation, high water storage capacity, enough steam escape channels and high light capture capability. When the height of CCT exposed to the environment was adjusted to be 10 cm, SVG showed an amazing water evaporation rate of 4.12 kg m −2 h −1 under 1 kW m −2 light intensity, which was higher than those of reported 3D devices, and the photothermal conversion efficiency was as high as 105.8%. The environmental energy was utilized to enhance the water evaporation performance by forming a cold evaporation surface. In addition, a device for collecting evaporated water outdoors has been designed, with an average evaporation rate of 1.04 kg m −2 h −1 , about 8.32 kg m −2 ·day −1 , demonstrating an excellent application prospect in the field of producing fresh water. • A natural all-in-one 3D solar vapor generator derived from cattail was designed. • The carbonized cattail (CCT) exhibits excellent water transmission performance. • The side surface of the CCT solar vapor generator as a cold evaporation surface can obtain energy from the environment to enhance water evaporation performance. • The high water evaporation rate of 4.12 kg m −2 h −1 was achieved under one sun.

Construction of hierarchical sea urchin-like manganese substituted nickel cobaltite@tricobalt tetraoxide core-shell microspheres on nickel foam as binder-free electrodes for high performance supercapacitors

Construction of binder-free electrodes with hierarchical core-shell nanostructures is considered to be an effective route to promote the electrochemical performance of supercapacitors. In this work, the porous Ni0.5Mn0.5Co2O4 nanoflowers anchored on nickel foam are utilized as framework for further growing Co3O4 nanowires, resulting in the hierarchical sea urchin-like Ni0.5Mn0.5Co2O4@Co3O4 core-shell microspheres on nickel foam. Owing to the advantages brought by unique porous architecture and synergistic effect of the multi-component composites, the as-prepared electrode exhibits a high specific capacitance (931 F/g at 1 A/g), excellent rate performance (77% capacitance retention at 20 A/g) and outstanding cycle stability (92% retention over 5000 cycles at 5 A/g). Additionally, the assembled Ni0.5Mn0.5Co2O4@Co3O4//AC (activated carbon) asymmetric supercapacitor achieves a high energy density (50 Wh/kg at 750 W/kg) and long durability (88% retention after 5000 cycles).

Cobalt-embedded hierarchically-porous hollow carbon microspheres as multifunctional confined reactors for high-loading Li-S batteries

Abstract The shuttle effect of dissolved polysulfides migrating to and depositing on anodes often leads to low round-trip efficiency and short cycle life for lithium-sulfur (Li-S) batteries. Herein, we report the rational design of cobalt-embedded nitrogen-doped hollow carbon microspheres (Co@N-HCMSs) as a multifunctional sulfur host for Li-S batteries. The hollow carbon microspheres exhibit large central cavities wrapped by a hierarchically porous shell, showing a large surface area of 1954 m2 g−1. Furthermore, the carbon shells display a unique porous architecture, in which small pores are scattered on the outside and large pores are inside, thereby functioning as a selection barrier to confine polysulfides and diffuse Li+ simultaneously. Moreover, the highly dispersed cobalt nanoparticles in the porous shell activate the surrounding N-doped carbon layer, which not only promote chemical adsorption of polysulfides but also catalyze polysulfide conversion. This facilitation effect has been confirmed by Bader charge and density function theory (DFT) calculations. When applied in Li-S batteries, the sulfur-impregnated Co@N-HCMSs cathode material exhibits excellent electrochemical performances, especially with a high sulfur content of 90.5 wt% and a high areal sulfur loading of 5.1 mg cm−2.

Bio-assisted engineering of hierarchical porous carbon nanofiber host in-situ embedded with iron carbide nanocatalysts toward high-performance Li–S batteries

Developing high-energy-density lithium-sulfur batteries (LSBs) heavily depends on the rational design of cathodes in order to address the key challenge on suppressing the notorious polysulfide shuttling, particular in high-sulfur-loading electrodes. Herein, a unique hierarchical porous N-doped carbon nanofiber architecture with in-situ generated iron carbide nanocatalysts (Fe3C@PCNFs) is delicately designed by using natural collagen fibers as the precursor matrix and the structure-directing agent, which can be applied as an advanced sulfur host in LSBs. Benefiting from the thermal-induced etching by ferric species combined with ZrO2 hard-template management, such transformed Fe3C@PCNFs framework exhibits enhanced graphitization degree, impressive hierarchical porous architecture, and high specific surface area near 1300 m2 g−1. The in-situ embedded polar Fe3C nanoparticles are proved to possess excellent chemical adsorption and catalysis effect toward the immobilization-conversion of polysulfides and fast Li2S nucleation. Thus, a target cathode (S–Fe3C@PCNFs) with >76 wt% sulfur content can deliver outstanding rate capability (632 mAh g−1 at 5C) and superb cycling performance (∼0.067% capacity decay per cycle over 500 cycles). Impressively, when applied with high-areal-loading of 6.3 mg cm−2, the S–Fe3C@PCNFs still exhibits a stable cycling life together with a significant high areal capacity of 5.0 mAh cm−2, manifesting a promising application in practical LSBs.

Facile synthesis of flower-like P-doped nickel-iron disulfide microspheres as advanced electrocatalysts for the oxygen evolution reaction

Although phosphosulfide and P-doped sulfide materials have been widely reported as highly efficient electrocatalysts for the oxygen evolution reaction (OER), the practical application of these materials is severely hindered by their complicated fabrication method. This paper reports a facile preparation of 3D hierarchical flower-like P-doped Ni–Fe disulfide microspheres by successive hydrothermal and one-step phosphosulfidation, using P2S5 as a source of phosphorus (P) and sulfur (S). Owing to the synergistic effect of the binary metal system, the introduction of P, and unique 3D porous architecture, the flower-like P-doped Ni–Fe disulfide microspheres deliver outstanding OER performance—an overpotential of 264 mV to achieve a current density of 10 mA cm−2, a significantly low Tafel slope of 48 mV dec−1, and excellent long-term durability over 50 h with negligible degradation in alkaline media. The fabrication method applied in this study can provide a new facile approach to the design and synthesis of P-doped metal sulfide materials for various electrochemical applications.

High-performance electromagnetic wave absorbers based on Fe-based MOFs-derived Fe/C composites

A combination of carbon materials and metal materials has received extensive attention of applications in electromagnetic wave (EMW) absorption. Herein, the porous Fe/C composites were fabricated by pyrolyzing Fe-MOFs precursor with different organic ligand ratios under Ar atmosphere. The Fe/C composites exhibited an excellent EMW absorption ability on account of the unique porous structure architecture, enhanced dipolar/interfacial polarization between two components, improved multiple reflection and scattering, and better impedance matching. The EMW absorption performance of three kinds of porous Fe/C composites was studied in detail. Among them, the minimum reflection loss (RL) of FC-1 sample could reach − 19.57 dB at a thickness of 2 mm with a better effective bandwidth (RL ≤ − 10 dB) covering the whole Ku band. Notably, the optimal RL of FC-2 sample achieved − 56.94 dB at a thickness of 3.1 mm, besides, the effective absorption bandwidth could reach 6.73 GHz with the thickness of only 2.5 mm. These results confirm that the as-prepared Fe/C composites with high-performance EMW absorption ability and broad effective bandwidth are a promising candidates as an EMW absorber.

Surface engineering induced hierarchical porous Ni12P5-Ni2P polymorphs catalyst for efficient wide pH hydrogen production

Exploring nickel phosphides electrocatalysts with both massive active sites and superior intrinsic activity for efficient and robust hydrogen evolution reaction (HER) is highly desirable, yet challenging. Here we constructed a novel Ni12P5-Ni2P polymorphs catalyst (Ni-P/Ni/NF) through a successive hydrothermal treatment and annealing process on deliberately coarsened nickel foam (Ni/NF) support. Our experimental and theoretical studies demonstrate the application of Ni/NF is key to rendering a unique hierarchical porous architecture with Ni12P5-Ni2P heterostructures, which not only increases the number of active sites but also enhances the intrinsic activity of the catalyst. Such a unique structure endows Ni-P/Ni/NF with low overpotentials of 129, 83, and 112 mV (at current density of 10 mA cm−2) for HER in alkaline, acidic and neutral media, respectively, which surpasses many of reported state-of-the-art nonprecious HER catalysts. This work presents a valuable route for designing and fabricating inexpensive and high-performance catalysts for electrocatalysis and beyond.

Facile One-Step Preparation of 3D Nanoporous Cu/Cu6Sn5 Microparticles as Anode Material for Lithium-Ion Batteries with Superior Lithium Storage Properties

In this article, three-dimensional nanoporous Cu/Cu6Sn5 microparticles (3D-NP Cu/Cu6Sn5 MPs) were prepared by one-step chemical dealloying of Cu20Sn80 (at%) alloy slices in a mixed aqueous solution of HF and HNO3 and then filled into a three-dimensional porous copper foam (3D-PCF) skeleton as anode (3D-PCF@Cu/Cu6Sn5) for lithium-ion batteries (LIBs). The results show that the ellipsoidal 3D-NP Cu/Cu6Sn5 MPs with feature sizes of 3 to 8 μm are composed of numerous uniform nanoparticles (100 to 200 nm) and plenty of voids. Compared with similar Sn-based electrodes in this work and other published reports, the as-prepared electrode delivers more outstanding electrochemical performance with a superior reversible capacity of 1.90 mAh cm−2, 84.44% capacity retention and > 99.5% coulombic efficiency upon 200 cycles. The cycling stability and integrity of the overall structure of the composite electrode have been greatly enhanced under the synergistic effect of the buffer effect of copper as the inactive component, the unique hierarchical porous electrode architecture and the effective limitation in three dimensions of the 3D-PCF skeleton. We are confident that this work can provide new-generation LIBs with a promising anode candidate and a facile method of dealloying, and a subsequent filling step can achieve the practical production and application of high-performance LIBs.

Multiple applications of bio-graphene foam for efficient chromate ion removal and oil-water separation

This paper presents the synthesis of bio-graphene foams (bGFs) from renewable sources, and the application of bGFs as new adsorbents in removal of chromate ions and oil contaminants from waste water. A two-step synthetic method was developed to produce bGFs with unique porous architecture and high specific surface area (up to 805 m2 g−1) that is highly desirable for environmental applications. The adsorption performance of prepared bGFs for removal of chromate ions from water was studied in relation to CrO42− concentration, adsorbent load, pH, and contact time to confirm adsorption capacity, kinetics and pH dependence. The adsorption isotherms of chromate ions were consistent with the Langmuir model, revealing an outstanding adsorption capacity of 245 mg of Cr(VI)/g bGFs (pH∼7). bGFs were capable of reducing Cr(VI) in water below the maximum permissible level (0.050 mg dm−3) for human consumption (WHO). In a second application, our results convincingly showed excellent performance of bGFs in separating organic solvents and oils from water in a continuous oil-water separation process showing 99.1% and 98.8% separation efficiency for toluene and petroleum, respectively. Our findings confirm that the outstanding performance of bGFs, and suggest their use as efficient adsorbents for environmental remediation.

Unique cellular network formation guided by heterostructures based on reduced graphene oxide - Ti3C2Tx MXene hydrogels

Two-dimensional (2D) materials remain highly interesting for assembling three-dimensional (3D) structures, amongst others, in the form of macroscopic hydrogels. Herein, we present a novel approach for inducing chemical inter-sheet crosslinks via an ethylenediamine mediated reaction between Ti3C2Tx and graphene oxide in order to obtain a reduced graphene oxide-MXene (rGO-MXene) hydrogel. The composite hydrogels are hydrophilic with a stiffness of ~20 kPa. They also possess a unique inter-connected porous architecture, which led to a hitherto unprecedented ability of human cells across three different types, epithelial adenocarcinoma, neuroblastoma and fibroblasts, to form inter-connected three-dimensional networks. The attachments of the cells to the rGO-MXene hydrogels were superior to those of the sole rGO-control gels. This phenomenon stems from the strong affinity of cellular protrusions (neurites, lamellipodia and filopodia) to grow and connect along architectural network paths within the rGO-MXene hydrogel, which could lead to advanced control over macroscopic formations of cellular networks for technologically relevant bioengineering applications, including tissue engineering and personalized diagnostic networks-on-chip. Statement of SignificanceConventional hydrogels are made of interconnected polymeric fibres. Unlike conventional case, we used hydrothermal and chemical approach to form interconnected porous hydrogels made of two-dimensional flakes from graphene oxide and metal carbide from a new family of MXenes (Ti3C2Tx). This way, we formed three-dimensional porous hydrogels with unique porous architecture of well-suited chemical surfaces and stiffness. Cells from three different types cultured on these scaffolds formed extended three-dimensional networks – a feature of extended cellular proliferation and pre-requisite for formation of organoids. Considering the studied 2D materials typically constitute materials exhibiting enhanced supercapacitor performances, our study points towards better understanding of design of tissue engineering materials for the future bioengineering fields including personalized diagnostic networks-on-chip, such as artificial heart actuators.

Boosting styrene epoxidation via CoMn2O4 microspheres with unique porous yolk-shell architecture and synergistic intermetallic interaction

Achieving satisfactory organic transformation reactions under mild conditions using high-performance catalysts that are composed of cost-effective and earth-abundant elements has always been an aspiration for scientists in the field of catalysis. In this work, CoMn2O4 microspheres with intriguing porous yolk-shell architecture have been constructed by a facile solvothermal reaction and post-calcination treatment, and were employed for the first time in the epoxidation reaction of styrene (SER). Among the series of CoMn2O4 catalysts, the one calcined at 600 °C (CMO-600) displays superior catalytic performance in the SER, achieving an excellent conversion of 97.7%, a prominent selectivity of 83.7% to SO and a good recycling performance. The remarkable SER performance of the CMO-600 benefits from the collaborative influences derived from the unique porous yolk-shell architecture and the synergy of the two metal centers regarding high surface Mn2+/ Mn3+ atomic ratio, abundant redox couples and rich oxygen vacancies. The reaction pathway analysis and the activation energy measurement were performed as well to unravel the inner relationship between the catalytic behavior and the catalyst properties. This study affords a fresh impetus to the developing of high-performance bimetallic oxides for oxidation reactions in organic catalysis.

Improved thermal stability of melamine resin spheres and electrochemical properties of their carbon derivatives induced by F127

Melamine–formaldehyde (MF) resin-based carbon stands out among energy materials due to their superior nitrogen content and intriguing comprehensive properties; however, the inferior rate capability hinders its further application as electrode materials in supercapacitors. In this work, monodisperse melamine–formaldehyde resin microspheres (MMRMs) have been prepared by mild emulsion polymerization, with Pluronic F127 as soft template as well as stable response sites. Triblock copolymer F127 not only regulates the size of the MMRMs, but also enhances its thermal stability owing to strong hydrogen bond forces between resin oligomers and F127. Carbon derived from the subsequent pyrolysis of MMRMs (MFC-0.10-8) has unique lamellar porous architecture and much higher specific surface area (325.75 m2 g−1) compared with that of MFC-0-8 without F127 (82.18 m2 g−1), which is crucial to enhance the electrochemical performances as electrode material. The N content of the carbonized MMRMs is up to 22.0 at%, which brings considerable pseudo-capacitance and rate capability (85.5% capacitance retention from 1 to 10 A g−1). MFC-0.10-8 exhibits high gravimetric capacitance of 311 F g−1 at the current density of 0.5 A g−1 and outstanding capacitance retention with 105% of its initial capacitance after 10000 cycles in 2.0 M H2SO4 electrolyte.

Multiscale Understanding and Architecture Design of High Energy/Power Lithium‐Ion Battery Electrodes

AbstractAmong various commercially available energy storage devices, lithium‐ion batteries (LIBs) stand out as the most compact and rapidly growing technology. This multicomponent system operates on coupled dynamics to reversibly store and release electricity. With the hierarchical electrode architectures inside LIBs, versatile functionality can be realized by design, while considerable difficulties remain to be solved to fully exploit the capability of each constituent. With the rapid electrification of the transportation sector and an urgent need to overhaul electric grids in the context of renewable energy penetration, demands for concomitant high energy and high power batteries are continuously increasing. Although building an ideal battery requires effort from multiple scientific and engineering aspects, it is imperative to gain insight into multiscale transport behaviors arising in both spatial and temporal dimensions, and enable their harmonic integration inside the whole battery system. In this progress report, recent research efforts on characterizing and understanding transport kinetics in LIBs are reviewed covering a broad range of electrode materials and length scales. To demonstrate the crucial role of such information in revolutionary electrode design, examples of innovative high energy/power electrodes are provided with their unique hierarchical porous architectures highlighted. To conclude, perspectives on further approaches toward advanced thick electrode designs with fast kinetics and tailored properties are discussed.

Hydrogel membranes: A review.

Hydrogel membranes (HMs) are defined and applied as hydrated porous media constructed of hydrophilic polymers for a broad range of applications. Fascinating physiochemical properties, unique porous architecture, water-swollen features, biocompatibility, and special water content dependent transport phenomena in semi-permeable HMs make them appealing constructs for various applications from wastewater treatment to biomedical fields. Water absorption, mechanical properties, and viscoelastic features of three-dimensional (3D) HM networks evoke the extracellular matrix (ECM). On the other hand, the porous structure with controlled/uniform pore-size distribution, permeability/selectivity features, and structural/chemical tunability of HMs recall membrane separation processes such as desalination, wastewater treatment, and gas separation. Furthermore, supreme physiochemical stability and high ion conductivity make them promising to be utilised in the structure of accumulators such as batteries and supercapacitors. In this review, after summarising the general concepts and production processes for HMs, a comprehensive overview of their applications in medicine, environmental engineering, sensing usage, and energy storage/conservation is well-featured. The present review concludes with existing restrictions, possible potentials, and future directions of HMs.

The dodecahedral Nitrogen-doped carbon coated ZnO composite derived from zeolitic inidazolate framework-8 with excellent cycling performance for zinc based rechargeable batteries

A novel Nitrogen-doped carbon coated ZnO(NC@ZnO) composite derived from zeolitic inidazolate framework-8(ZIF-8) precursor is successfully synthesized through a simple hydrothermal reaction followed by calcination treatment. The as-prepared NC@ZnO composite is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Nitrogen adsorption-desorption analysis, and its formation mechanism is proposed. When evaluated as anode material for Ni–Zn alkaline secondary batteries, the NC@ZnO composite exhibits outstanding electrochemical performance compared with that of the commercial ZnO, delivering a discharge specific capacity of 531 mAh g−1 with the capacity retention ratio about 83.5% after 945 cycles. The outstanding electrochemical performance is ascribed to the Nitrogen-doped carbon layer and the unique dodecahedral porous architectures with a larger specific surface area, which can facilitate the electrons transfer and restrain the formation of zinc dendrites during repeated charge-discharge process.

Spatial and chemical confined ultra-small CsPbBr3 perovskites in dendritic mesoporous silica nanospheres with enhanced stability

Abstract Cesium lead halide-based perovskite (CsPbX3, X = Cl, Br, I) nanoparticles (NPs) have received considerable attention for their outstanding photophysical properties and promising applications in optoelectronic devices. However, the optoelectronic performance of CsPbX3 NPs synthesized by most of present strategies are susceptible to external factors when exposed in atmosphere. Herein, benefiting from the unique open 3D porous architecture of dendritic mesoporous silica nanospheres (DMSNs) with cage-like spherical nanopores, highly dispersed and pure cubic CsPbX3 NPs were successfully immobilized onto the mesoporous networks. A strategy of combining chemical anchoring and spatial isolation is designed for the one-pot synthesis of CsPbX3 NPs. These as-fabricated CsPbX3@HA-DMSNs exhibit excellent luminescence property (tunable emission color and high quantum yield (QY reached a maximum of 55%)) and enhanced stability (especially for the water resistance capacity). The photoluminescence (PL) was sustained without any distinct change after 100 d storage under ambient conditions, even 90% PL intensity was maintained after continuous UV irradiation for 45 h and no obvious PL reduction was observed when soaked in water for 7 h. Most importantly, the resulting CsPbX3@HA-DMSNs could be easily purified by filtration without aggregation and easy to scale up production compared with the conventional solution-phase mediated synthesis, which provides an alternative for the effective fabrication of perovskite-based devices, for example, here, the white light emitting devices (LEDs).

High-Performance, Long-Life, Rechargeable Li-CO2 Batteries based on a 3D Holey Graphene Cathode Implanted with Single Iron Atoms.

A highly efficient cathode catalyst for rechargeable Li-CO2 batteries is successfully synthesized by implanting single iron atoms into 3D porous carbon architectures, consisting of interconnected N,S-codoped holey graphene (HG) sheets. The unique porous 3D hierarchical architecture of the catalyst with a large surface area and sufficient space within the interconnected HG framework can not only facilitate electron transport and CO2 /Li+ diffusion, but also allow for a high uptake of Li2 CO3 to ensure a high capacity. Consequently, the resultant rechargeable Li-CO2 batteries exhibit a low potential gap of ≈1.17 V at 100 mA g-1 and can be repeatedly charged and discharged for over 200 cycles with a cut-off capacity of 1000 mAh g-1 at a high current density of 1 A g-1 . Density functional theory calculations are performed and the observed appealing catalytic performance is correlated with the hierarchical structure of the carbon catalyst. This work provides an effective approach to the development of highly efficient cathode catalysts for metal-CO2 batteries and beyond.

Constructing expanded ion transport channels in flexible MXene film for pseudocapacitive energy storage

2D transition metal carbide (MXene) based flexible films have received increasing attention in the application of energy storage for portable and wearable electronic devices. However, the self-restacking caused by Van der Waals interactions between the layers lead to insufficient access to allow the electrolyte ions to contact the active material. Herein, we rationally utilized the freeze-drying technique to prepare MXene film electrode for alleviating its self-restacking and improving the electrochemical performances. Through freeze-drying treatment, the frozen solvent molecules were removed by sublimation, and alleviating the adverse effect of van der Waals forces and contributing to the enlarged layer space. The constructed freeze-dried MXene (f-MXene) films generate unique porous architecture, which can provide highly efficient ion diffusion and transport channels. Consequently, the typical f-MXene-10 film exhibit good specific capacitance (341.5 F g−1/922.1 F cm−3 at 1 A g−1) and desired capacitance retention of 60.4% from 1 to 10 A g−1. Moreover, the assembled asymmetric device delivered a maximal gravimetric energy density of 6.1 Wh Kg−1, volumetric energy density of 16.4 Wh L−1 and a good capacitance retention of 89.3% after 10,000 cycles. The rationally designed synthesizing route has attractive promise to promote MXene materials for diverse energy and environmental applications.

Fabrication of porous Na3V2(PO4)3/reduced graphene oxide hollow spheres with enhanced sodium storage performance

Sodium-ion batteries (SIBs) have long been recognized as a potential substitute for lithium-ion batteries, while their practical application is greatly hindered owing to the absence of suitable cathode materials with improved rate capability and prolonged cycling life. Na3V2(PO4)3 (NVP) has drawn extensive attention among the cathode materials for SIBs because of its fast Na+-transportable framework which enables high-speed charge transfer, but the poor electric conductivity of NVP significantly restricts the Na+ diffusion. To tackle this issue, in this work, porous NVP/reduced graphene oxide hollow spheres (NVP/rGO HSs) are constructed via a spray drying strategy. Due to the unique porous hollow architecture, the synthesized compound manifests a high reversible capacity of 116 mAh g−1 at 1 C (1 C = 118 mA g−1), an outstanding high-rate capability of 107.5 mAh g−1 at 10 C and 98.5 mAh g−1 at 20 C, as well as a stable cycling performance of 109 mAh g−1 after 400 cycles at 1 C and 73.1 mAh g−1 after 1000 cycles at 10 C. Moreover, galvanostatic intermittent titration technique demonstrates that the Na+ diffusion coefficient of NVP/rGO HSs is an order of magnitude larger than the pristine NVP. The remarkable electrochemical properties of NVP/rGO HSs in full cells further enable it a potential cathode for SIBs.

Porous core-shell zeolitic imidazolate framework-derived Co/NPC@ZnO-decorated reduced graphene oxide for lightweight and broadband electromagnetic wave absorber

High-efficiency microwave absorbers, characteristic of thin thickness, lightweight, broad bandwidth and strong absorptivity, have presented the immense potential in daily communication and radar stealth. Herein, a novel 3D heterostructured material with high specific surface area and high porosity, namely Co/NPC@ZnO/rGO, was constructed via a facile four-step method, in which porous core-shell Co/NPC@ZnO NPs with the diameter of around 700 nm prepared by the direct pyrolysis of ZIF-67@ZnO NPs were uniformly implanted onto and tightly wrapped in pleated rGO nanosheets. Benefiting from the well-designed components and configurations that can lead to the desirable impedance matching, occupying a crucial position in the entire absorption process; and the enhanced attenuation capacity derived from unique porous and core-shell architectures; the as-prepared composites evenly mixing the paraffin matrix with 30 wt% display the dramatically exceptional microwave absorbency, achieving the optimal reflection loss(RL) of −45.4 dB at thickness of only 2 mm, and especially, the valid response bandwidth of 5.4 GHz, when the mass percentage of Co/NPC@ZnO to GO is 3:1. Additionally, coupling with the merit of lightweight originating from the porous appearance of Co/NPC@ZnO and the inherent nature of rGO, this research exhibits the tremendous reference value for the assembly of ideal lightweight and wideband microwave absorbents in the future.