In-situ anchoring of Fe3O4/ZIF-67 dodecahedrons in highly compressible wood aerogel with excellent microwave absorption properties

Xu, Lulu; Xiong, Ye; Dang, Baokang; Ye, Zhangning; Jin, Chunde; Zhang, Jiayi; Yu, Xiaohong

doi:10.1016/j.matdes.2019.108006

Cited by 106 publications

(31 citation statements)

References 46 publications

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“…The Fe 2p spectrum can be divided into six peaks (see Figure 2b) [24]. Another satellite peak is probably attributed to other unidentified Fe compounds [25]. The backscattering electron image of the oxidized nickel slag (shown in Figure 1d) demonstrates that the main phases in areas marked with 1 and 2 are assigned to silicate and magnetite, respectively, according to data analysis in Table 3.…”

Section: Structure Characterizationmentioning

confidence: 94%

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Microwave Absorption Properties of Magnetite Particles Extracted from Nickel Slag

Yan

Shen

et al. 2020

Materials

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The utilization of nickel slag has attracted much attention due to its high-content of valuable elements. As a part of these efforts, this work focuses on whether magnetite crystals, obtained from nickel slag via molten oxidation, magnetic separation, and ball-milling can be used as a microwave absorber. The composition, morphology, microstructure, magnetic properties, and microwave absorption performance were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), and vector network analysis (VNA). The results reveal that the magnetite crystals exhibit excellent microwave absorption properties because of the synergistic action between dielectric loss and magnetic loss. The minimum reflection loss (RL) of the particles obtained after 6 h ball-milling reaches −34.0 dB at 16.72 GHz with thickness of 5 mm. The effective frequency bandwidth (RL ≤ −10 dB) is 4.8–5.4 GHz and 15.9–17.6 GHz. Interfacial polarization of the particles could play a crucial role in improving absorbing properties because several components contained in the particles can dissipate electromagnetic wave effectively. The current study could show great potential in the preparation of magnetite crystals and utilization of nickel slag.

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Section: Structure Characterizationmentioning

confidence: 94%

“…The satellite peak at 719.05 eV indicates the co-existence of Fe 2+ and Fe 3+ [24]. Another satellite peak is probably attributed to other unidentified Fe compounds [25].…”

Section: Structure Characterizationmentioning

confidence: 95%

Microwave Absorption Properties of Magnetite Particles Extracted from Nickel Slag

Yan

Shen

et al. 2020

Materials

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“…A DW-based self-luminous composite was prepared for both thermal and light energy storage. [231] Melted TD and SrO•Al 2 O 3 •SiO 2 :Eu 2+ were mixed at different weight ratios (100:5, 100:10, 100:15, and 100:20) and uniformly dispersed [228] Copyright 2019, Elsevier Ltd. Adapted with permission.…”

Section: Self-luminous Composite Pcmsmentioning

confidence: 99%

mentioning

confidence: 99%

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Kumar

Jyske

Petrič

2021

Advanced Sustainable Systems

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performance environmentally friendly materials. This is because new processes will be required that allow control on all hierarchical levels. Wood is well defined as a biological engineering material with a complex hierarchical structure of organic material based on cellulose fibrils embedded in a matrix of hemicelluloses and lignin. [1,2] Wood has long been used as a construction material, as well as for pulp and paper production. These applications are highly dependent on the properties of lignin in wood. Removal of lignin is the key step in pulp and paper production, in addition to the conversion of biomass to liquid biofuels. Lignin was first discovered in wood by Anselme Payen in 1839, [3] as the incrusting material that must be removed to isolate the useful fibers in wood. Research pertaining to wood nanotechnology or functional wood materials is a rapidly emerging field. Functional wood materials are mostly fabricated by treating hierarchical natural templates (wood cell wall) by chemical and thermal means. These treatments selectively modify the wood cell wall structure (fine pore spaces and inner lumen surface area) for different applications. [4] The pore region and inner lumen surface have actively been modified to enhance the bulk properties of wood using organic chemicals, [5] inorganic chemicals, organic-inorganic chemicals, [6,7] and thermal methods. [8] Hybrid wood scaffolds have been prepared for diverse applications such as magnetic wood, [9,10] as well as wood-mineral and wood-metal hybrids. [11] Recent research on delignified wood (DW) has emerged from the classical pulp production method. In the preparation of DW, the embedded lignin is removed from the wood cell wall structure, while maintaining the natural hierarchical cellulosic structure. [12] Initially, DW was prepared in order to understand the unknown ultrastructure of wood cell walls. However, since 2015, research in this area has rapidly expanded to focus on the development of wood-based functional scaffolds. Within the literature, DW is predominantly prepared using alkaline delignification methods such as Kraft pulping (a mixture of sodium hydroxide (NaOH) and sodium sulfite (Na 2 SO 3 )) heated to boiling temperature), followed by bleaching using hydrogen peroxide (H 2 O 2 ) to remove the lignin. DW is chemically hydrophilic due to the presence and exposure of hydroxyl groups and possible sites for DW functionalization. DW scaffolds have been functionalized

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“…Next, Xu et al [27] introduced a porous wood aerogel (WA) modified with Fe 3 O 4 /ZIF-67 nanoparticles for the microwave absorption. The natural delignified WA was used as the porous low-density compressible matrix, and Fe 3 O 4 /ZIF-67 dodecahedrons as the absorbing agents.…”

Section: Microwave Absorbers a Nanocomposite Absorbing Materialsmentioning

confidence: 99%

Green Nanocomposite-Based Metamaterial Electromagnetic Absorbers: Potential, Current Developments and Future Perspectives

et al. 2020

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The use of the natural materials instead of conventional materials as electromagnetic absorbers promotes environmental sustainability, cost-effectiveness, and ease of accessibility. Furthermore, these materials may also be designed as absorbers and as reinforcements in building materials in a lightweight form. The absorbing ability of composite materials can be customized based on the chosen fillers. Specifically, magnetic and dielectric fillers can be incorporated to improve the absorption of a composite material compared to traditional materials. This work aims to review recent developments of electromagnetic absorbers enabled by nanocomposites, metamaterial and metasurface-based, as well as green composite alternatives. First, the background concepts of electromagnetic wave absorption and reflection will be presented, followed by the assessment techniques in determining electromagnetic properties of absorbing materials. Next, the stateof-the-art absorbers utilizing different materials will be presented and their performances are compared. This review concludes with a special focus on the future perspective of the potential of metamaterial based nanocellulose composites as ultrathin and broadband electromagnetic absorbers. INDEX TERMS Electromagnetic, microwave absorber, nanocomposites, metamaterial, nanocellulose. I. INTRODUCTION In recent years, the development of wireless technologies with the particular aim at achieving higher communication throughput and wider bandwidths for high-speed communication have been developed rapidly to accommodate consumers' needs. However, the wide use of wireless communication systems has also resulted in an increasing electromagnetic interference (EMI) to the environment. The conducted or radiated electromagnetic signals interferes with The associate editor coordinating the review of this manuscript and approving it for publication was Kuang Zhang.

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In-situ anchoring of Fe3O4/ZIF-67 dodecahedrons in highly compressible wood aerogel with excellent microwave absorption properties

Cited by 106 publications

References 46 publications

Microwave Absorption Properties of Magnetite Particles Extracted from Nickel Slag

Microwave Absorption Properties of Magnetite Particles Extracted from Nickel Slag

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Green Nanocomposite-Based Metamaterial Electromagnetic Absorbers: Potential, Current Developments and Future Perspectives

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