A facile precursor pyrolysis route to bio-carbon/ferrite porous architecture with enhanced electromagnetic wave absorption in S-band

Zhang, Tao; Zhao, Dongyang; Wang, Limin; Meng, Rui; Zhao, Hang; Zhou, Pengyu; Xia, Long; Zhong, Bo; Wang, Huatao; Wen, Guangwu

doi:10.1016/j.jallcom.2019.153269

Cited by 37 publications

(6 citation statements)

References 36 publications

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“…The morphologies and internal structures of the selected N-Fe/BC-2 sample (hereinafter referred to as N-Fe/BC) and BC sample were characterized by SEM and TEM, respectively. From Figure a1,a2, the surface of BC was relatively smooth and had a flake structure, and a large number of clearly visible and relatively uniform microporous structures appeared, which are typical characteristics of carbon-based materials produced by microwave heating . In contrast, after K 2 FeO 4 modification, the basic morphological characteristics of the original BC disappeared, and the surface of N-Fe/BC was rough, forming irregular porous structures with different pore sizes (shown by yellow dotted lines in Figure b2).…”

Section: Resultsmentioning

confidence: 97%

“…From Figure 2a1,a2, the surface of BC was relatively smooth and had a flake structure, and a large number of clearly visible and relatively uniform microporous structures appeared, which are typical characteristics of carbon-based materials produced by microwave heating. 38 In contrast, after K 2 FeO 4 modification, the basic morphological characteristics of the original BC disappeared, and the surface of N-Fe/BC was rough, forming irregular porous structures with different pore sizes (shown by yellow dotted lines in Figure 2b2). In addition, many crystal structures of various shapes were attached to the carbon substrate surface of N-Fe/BC (shown by white dotted lines in Figure 2b2).…”

Section: Resultsmentioning

confidence: 98%

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Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

et al. 2022

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To recover valuable products from biomass, bifunctional catalysts (N-Fe/BC) capable of microwave absorption and oriented production of phenolics were prepared by a one-pot method involving the microwave-induced K2FeO4. Its catalytic performances were evaluated, and the catalytic mechanism was explored using a model compound and DFT calculations. The cycle performance and deactivation mechanism were investigated. N-Fe/BC possessed a large S BET value (265.21 m2 g–1), good pore distribution, and abundant Fe and N species, resulting in good dielectric and catalytic properties. After catalysis, the heating rates reached 63.78–107.84 °C min–1, and the selectivity and yield of phenol-enriched bio-oil improved significantly, reaching maximum values of 80.28% and 38.09 wt % at 550 °C with 20 wt % N-Fe/BC, respectively. Model compound experiments and DFT calculations showed that N-Fe/BC directionally generated phenolics by changing the reaction path and forming “hot spots” that stimulated the catalytic reforming of oxygen-containing compounds. The catalytic performance decreased slightly after five cycles, due to active site loss, carbon deposition, and pore collapse.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

et al. 2022

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“…The treated carbon‐based materials are pyrolyzed in nitrogen atmosphere after being dipped in Fe(NO 3 ) 3 ‐saturated solution to obtain ferrite/carbon‐based composites, which is the precursor pyrolysis method. Zhang et al [ 55 ] prepared biocarbon/ferrite porous architectures by a facile precursor pyrolysis route to acquire a lightweight absorbent using natural bamboo and Fe(NO 3 ) 3 as the precursors ( Figure a). The minimum RL of the composites could reach −43.2 dB at 17.6 GHz (the bandwidth below −10 dB was 13.6, 4.4–18.0 GHz) and −21.9 dB at 14.6 GHz (the bandwidth below −10 dB was 6.4 GHz, 11.6–18.0 GHz).…”

Section: Binary Ferrite Composite Absorbing Materialsmentioning

confidence: 99%

Recent Research Progress of Ferrite Multielement Microwave Absorbing Composites

et al. 2022

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With the extensive application of electrical and wireless equipment, several electromagnetic pollution‐related issues have emerged. Therefore, the manufacturing of absorbing materials has become important to electromagnetic pollution. Ferrite is a common absorbing material; its single absorbing mechanism and narrow absorbing frequency band resist the wider usage as an ideal absorbing material. Adding different materials to ferrite has become a popular way to enhance its microwave absorption properties. Herein, the recent research on ferrite multicomponent microwave absorbing composites is summarized. For ferrite binary composite absorbing materials, the research progress of ferrite and graphene, carbon nanotubes, carbon fiber and other carbon materials, ferrite and polypyrrole, polyaniline and other polymer materials, and ferrite and MXene composites is introduced. In addition, the advancement of ferrite ternary absorbent materials research is also discussed. The growing development trend of ferrite composite absorbing materials is finally summed up, and the prospects of fabricating the “thin, light, wide, and strong” ferrite absorbing materials are put forward.

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“…Self-powering is a new method to promote the durability of charged filtration nanofiber membranes [27] which can generate charges to capture particulate matter during the filtration process [28]. According to the generation principles of electrical charges, these methods can be divided into various catalogues including piezoelectric [29], electromagnetic [30] and triboelectric [31]. The triboelectric nanofiber membrane is based on the principle of friction electricity generation.…”

Section: Introductionmentioning

confidence: 99%

Self-Powered Electrospun Composite Nanofiber Membrane for Highly Efficient Air Filtration

et al. 2020

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Highly efficient air filtration with low pressure drop is the key to air purification. In this work, a self-powered electrospun nanofiber membrane with an electrostatic adsorption effect was prepared to improve the filtration efficiency of micro/nano particles. The composite membrane was comprised of polyvinyl chloride (PVC) nanofibers and polyamide-6 (PA6) nanofibers. The triboelectric effect between the two adjacent nanofiber membranes generated electrostatic charges under the action of air vibration, by which the electrostatic adsorption with the same pressure drop was enhanced. The electrostatic voltage on the self-powered nanofiber membrane was 257.1 mV when the flow velocity was 0.1 m/s. For sodium chloride (NaCl) aerosol particles with a diameter of 0.3 μm, the removal efficiency of the self-powered composite nanofiber membrane was 98.75% and the pressure drop was 67.5 Pa, which showed a higher quality factor than the membrane without electrostatic charges. This work provides an effective way to improve the filtration performance of air filter membranes.

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A facile precursor pyrolysis route to bio-carbon/ferrite porous architecture with enhanced electromagnetic wave absorption in S-band

Cited by 37 publications

References 36 publications

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

Microwave-Induced One-Pot Preparation of Bifunctional N-Fe/BC Catalysts and Oriented Production of Phenol-Enriched Bio-Oil from Biomass Pyrolysis: Catalyst Synthesis, Performance Evaluation, and Mechanism Insight via Theoretical Calculations

Recent Research Progress of Ferrite Multielement Microwave Absorbing Composites

Self-Powered Electrospun Composite Nanofiber Membrane for Highly Efficient Air Filtration

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