Grow defect-rich bamboo-like carbon nanotubes on carbon black for enhanced microwave absorption properties in X band

Jiao, Yameng; Song, Qiang; Yin, Xu-Cheng; Han, Liyuan; Li, Wei; Li, Hejun

doi:10.1016/j.jmst.2021.12.041

Cited by 54 publications

(6 citation statements)

References 35 publications

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“…Previous studies have reported that the introduction of doped nitrogen in CNTS could facilitate electron transport. The introduction of C–NHx into adsorbents could also boost the adsorptive removal of organics due to its outstanding capability for hydrogen bonding [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

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Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

et al. 2023

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In this study, an E-fenton oxidation system based on Co-N co-doped carbon nanotubes (Co-N-CNTs) was designed. The Co-N-CNTs system showed fast degradation efficiency and reusability for the degradation of rhodamine B (RhB). The XRD and SEM results showed that the Co-N co-doped carbon nanotubes with diameters ranging from 40 to 400 nm were successfully prepared. The E-Fenton degradation performance of Co-N-CNTs was investigated via CV, LSV and AC impedance spectroscopy. The yield of H2O2 could reach 80 mg/L/h within 60 min, and the optimal voltage and preparation temperature for H2O2 yield in this system was −0.7 V (vs. SCE) and 800 °C. For the target pollutant of RhB, the fast removal of RhB was obtained via the Co-N-CNTS/E-Fenton system (about 91% RhB degradation occurred during 60 min), and the •OH played a major role in the RhB degradation. When the Fe2+ concentrations increased from 0.3 to 0.4 mM, the RhB degradation efficiency decreased from 91% to about 87%. The valence state of Co in the Co-N-C catalyst drove a Co2+/Co3+ cycle, which ensured the catalyst had good E-Fenton degradation efficiency. This work provides new insight into the mechanism of an E-Fenton system with carbon-based catalysts for the efficient degradation of RhB.

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Section: Resultsmentioning

confidence: 99%

“…Then, 1.00 mL of a H 2 SO 4 solution (3 M) and 1.00 mL of a K 2 TiO(C 2 O 4 ) 2 solution (0.05 M) were added into 2 mL of the tested solution. The mass concentration of H 2 O 2 was obtained from the tested absorbance in the absorbance curve of the standard H 2 O 2 solution [ 26 ].…”

Section: Methodsmentioning

confidence: 99%

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

et al. 2023

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“…The deconvoluted XPS patterns of the C 1s and Si 2p electronic states of SiC f are shown in Figure 5A, B. The C 1s peak could be decomposed into C–Si, C = C, C–C, and C–O peaks and the Si 2p peaks could be decomposed into Si–C, O–Si–C, and Si–O peaks 33–35 . The Si–C bond attributed to the SiC compound appeared at 101.0 eV.…”

Section: Resultsmentioning

confidence: 99%

Fine study of hierarchical interphase constructed by boron nitride and carbon nanotubes in SiC_f/SiC composites

Yan,

Fan,

Huang

et al. 2023

Int J Applied Ceramic Tech

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A fine study of the interfacial part in the silicon carbide fiber (SiCf) reinforced silicon carbide (SiC) composites was conducted by transmission electron microscopy. The boron nitride (BN) and carbon nanotubes (CNTs) were progressively coated on the SiCf by chemical vapor deposition method to form a hierarchical structure. Three composites with different interfaces, SiCf–CNTs/SiC, SiCf@BN/SiC, and SiCf@BN–CNTs/SiC, were fabricated by polymer infiltration and pyrolysis method. The interfaces and microstructures of the three composites were carefully characterized to investigate the improvement mechanism of strength and toughness. The results showed that BN could protect the surface of SiCf from corrosion and oxidation so that improved the possibility of debonding and pullout. CNTs could avoid the propagation of cracks in the composites so that improved the damage resistance of the matrix. The synergistic reinforcement brought by BN and CNTs interfaces made the SiCf@BN–CNTs/SiC composites with a tensile fracture strength as high as 359 MPa, with an improvement of 23% compared to that of SiCf@BN/SiC.

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“…Presently, with the development of electronic technology, it is vital to safeguard the electronic and information security of all types of ground buildings with important functions and tasks [13,14]. Researchers have worked to develop effective electromagnetic wave (EMW) shielding or EMW absorbing materials to solve these problems [15][16][17][18]. Wave absorbing materials exhibit greater advantages than shielding materials due to their ability to convert incident electromagnetic energy into thermal energy rather than reflecting it back into the environment [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO2-MnO-Al2O3 Based Manganese Ore Powder for Electromagnetic Protection

et al. 2022

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Considering the electromagnetic protection needs of important ground buildings, exploring the electromagnetic wave (EMW) absorption performance of manganese ore powder (MOP) building materials is an effective way to overcome its low added value and difficulty in popularizing. Here, choosing filling ratios commonly used in building materials such as autoclaved bricks, MOP/paraffin samples with 20%, 40%, and 60% mass fraction of MOP were prepared, and electromagnetic properties were analyzed at 2–18 GHz using the coaxial method. The results show that 60 wt% sample has the best absorption performance, with a minimum reflection loss (RLmin) value of −22.06 dB at 15.04 GHz, and the effective absorption bandwidth (EAB, RL < −10 dB) reaches 4.16 GHz at a 7.65 mm absorber thickness, covering most of the Ku-band region. The excellent microwave absorption performance of MOP is due to its multi-oxide forming multi-interface structure and rough surface, which can not only form abundant dipole and interfacial polarization under the action of EMW, but also reflect and scatter the incident EMW, prolong the transmission path, and enhanced the absorption of microwaves. This study demonstrates that MOP building materials can have excellent microwave absorption properties, thus becoming a new way to address harmful manganese residue; for example, autoclaved bricks, which can not only improve the added value of manganese residue building materials but also can be consumed on a large scale. It provides a new idea to solve the harm of manganese residue.

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Grow defect-rich bamboo-like carbon nanotubes on carbon black for enhanced microwave absorption properties in X band

Cited by 54 publications

References 35 publications

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

Fine study of hierarchical interphase constructed by boron nitride and carbon nanotubes in SiC_f/SiC composites

Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO2-MnO-Al2O3 Based Manganese Ore Powder for Electromagnetic Protection

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Grow defect-rich bamboo-like carbon nanotubes on carbon black for enhanced microwave absorption properties in X band

Cited by 54 publications

References 35 publications

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

Fast Degradation of Rhodamine B by In Situ H2O2 Fenton System with Co and N Co-Doped Carbon Nanotubes

Fine study of hierarchical interphase constructed by boron nitride and carbon nanotubes in SiCf/SiC composites

Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO2-MnO-Al2O3 Based Manganese Ore Powder for Electromagnetic Protection

Contact Info

Product

Resources

About

Fine study of hierarchical interphase constructed by boron nitride and carbon nanotubes in SiC_f/SiC composites