Ti3C2/Ni2P/triphenyl phosphite as antioxidative microwave absorbers with excellent photothermal property

Liu, Xiao; Wan, Gengping; Wu, Lihong; Li, Jun; Shi, San-Qiang; Wei, Qiyi; Wang, Guizhen

doi:10.1016/j.cej.2023.141275

Cited by 19 publications

(10 citation statements)

References 60 publications

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“…The microwave attenuation effect must be analyzed in conjunction with the impedance matching ( Z ), which is determined using the following formula Z = | Z normali normaln Z 0 | = μ r ε r tanh [ j true( 2 π c true) μ normalr ε normalr f d ] where d is the thickness of the absorber, and Z 0 and Z in are the free space and input impedances of the absorber, respectively. When Z approaches 1 (in the range of 0.8–1.2), more EMWs are absorbed rather than reflected on the surface, which is considered as good impedance matching . The impedance-matching contour maps of all four samples are shown in Figure b–e, in which values of 0.8 and 1.2 are indicated by black dashed lines.…”

Section: Resultsmentioning

confidence: 99%

“…When Z approaches 1 (in the range of 0.8−1.2), more EMWs are absorbed rather than reflected on the surface, which is considered as good impedance matching. 65 The impedancematching contour maps of all four samples are shown in Figure 5b−e, in which values of 0.8 and 1.2 are indicated by black dashed lines. CFMM-18 had a Z value that was much higher…”

Section: Resultsmentioning

confidence: 99%

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3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption

Wu,

Rao,

et al. 2024

ACS Appl. Mater. Interfaces

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Considering the increasing severity of electromagnetic wave pollution, the development of high-performance low-filler-content microwave absorbers possessing wide frequency bands and strong absorption for practical applications is a demanding research hotspot. In this study, from the perspectives of the electromagnetic component coordination and structural design, a three-dimensional (3D) interconnected CoFe 2 O 4 /MXene-melamine foam (MF) was constructed via simple impregnation and a single freeze-drying step. By changing the absorber (CoFe 2 O 4 /MXene) concentration, the pore opening and electromagnetic properties of the 3D foams can be effectively adjusted. When the absorber concentration is sufficiently high to clog the internal pores, the microwave absorption is hindered. When the filler (CoFe 2 O 4 /MXene-MF) content is just ∼5.8 wt % (at a density of ∼33.3 mg cm −3 ), a minimum reflection loss (RL min ) of −72.1 dB is achieved at a matching thickness of 3.32 mm, and an effective absorption bandwidth (4.54 GHz) covering the whole X band is achieved at a thickness of 3 mm. CoFe 2 O 4 /MXene-MF, which possesses a 3D porous electromagnetic network structure, optimizes impedance matching and enhances multiple polarization relaxations and reflections/scattering, resulting in superior absorption capabilities. In particular, the continuous network structure ensures the uniform distribution of electromagnetic fields in the microstructure, achieving high absorption at low filler contents. This work provides a reference for subsequent 3D absorber concentration studies and a novel engineering strategy for preparing a low-filler-content, lightweight, and efficient electromagnetic wave absorber, which could be applied in the fields of radar security and information communications. KEYWORDS: Ti 3 C 2 T x MXene, hollow CoFe 2 O 4 , microwave absorption, low filler content, 3D electromagnetic networks

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption

Wu,

Rao,

et al. 2024

ACS Appl. Mater. Interfaces

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“…In general, the photothermal properties of materials are positively correlated with their photoresponsiveness. 29 As a highly regarded 2D plasmonic material, Ti 3 C 2 can endow VP/Ti 3 C 2 heterojunctions with excellent light absorption by providing the localized surface plasmonic resonance (LSPR) effect (Figure 3A). Specifically, light irradiation induces the electrons in Ti 3 C 2 to oscillate from occupied to unoccupied states and produce hot electrons, resulting in the distribution of hot carriers on the material surface.…”

Section: Resultsmentioning

confidence: 99%

“…Under visible light irradiation conditions, pure VP can only produce low heat. In general, the photothermal properties of materials are positively correlated with their photoresponsiveness . As a highly regarded 2D plasmonic material, Ti 3 C 2 can endow VP/Ti 3 C 2 heterojunctions with excellent light absorption by providing the localized surface plasmonic resonance (LSPR) effect (Figure A).…”

Section: Resultsmentioning

confidence: 99%

Constructing Interfacial Charge Transfer Channels and Electric Field in Violet Phosphorus-Based van der Waals Heterojunction for Phototherapy of Periodontitis

Wu,

Deng,

Cheng

et al. 2024

ACS Nano

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Periodontitis, a chronic oral disease instigated by bacteria, severely compromises human oral health. The prevailing clinical treatment for periodontitis involves mechanical scraping in conjunction with antibiotics. Phototherapy is employed to rapidly remove the bacteria and achieve periodontitis treatment, effectively circumventing the adverse effects associated with traditional therapies. Constructing 2D/ 2D van der Waals (VDW) heterojunctions is a key strategy for obtaining excellent photocatalytic activity. Herein, a 2D/2D violet phosphorus (VP)/Ti 3 C 2 VDW heterojunction is designed using an interfacial engineering strategy. By constructing an electron transport "bridge" (P−Ti bond) at the heterogeneous interface as an effective transfer channel for photogenerated carriers, a compact monolithic structure between the VP and Ti 3 C 2 phases is formed, and the spatial barrier for electron transfer at the interface is eliminated. Meanwhile, the strong directional built-in electric field induced by the intensive electron-coupling effect at the heterogeneous interface served as an internal driving force, which greatly accelerates the exciton dissociation and charge transfer in the photocatalytic process. These excited photogenerated electrons and holes are trapped by O 2 and H 2 O on the surfaces of Ti 3 C 2 and VP, respectively, and are subsequently catalytically converted to antibacterial reactive oxygen species (ROS). The VP/Ti 3 C 2 VDW heterojunction eradicated 97.5% and 98.48% of Staphylococcus aureus and Escherichia coli, respectively, by photocatalytic and photothermal effects under visible light for 10 min. The VP/Ti 3 C 2 nanoperiodontal dressing ointment effectively attenuated inflammatory response, reduced alveolar bone resorption, and promoted periodontal soft and hard tissue repair. Its periodontitis therapeutic effect outperforms the clinically used Periocline.

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“…Figure c,d shows the comparison of the fabricated CFCNT0.35 nanocomposite with filler wt %, R L , and EAB for other available investigations. − Further, the comparison of CFCNT0.35 is made with the recently available nanocomposite in Supporting Information Table S3. The CFCNT0.35 nanocomposite structure has the ability to function in the presence of outside pressures in extreme environmental conditions despite degrading R L performance.…”

Section: Results and Discussionmentioning

confidence: 99%

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Tahalyani

Akhtar

Kar

2023

ACS Appl. Nano Mater.

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Highly flexible, bendable, stretchable, and ultralightweight microwave absorbers (MA) that can handle harsh environments are essential for conformal surface coating in aerospace and defence industries. Hence, crystalline carbon nanotubes (CNTs) are grown on carbon fibers (CFs) using the chemical vapour deposition technique (CVD) and embedded in polyurethane (PU) to obtain MA. The fabricated MA is flexible, highly stretchable (>400%), has a low percolation threshold (0.1 wt %), ultralightweight (0.35 wt %), and thin nanocomposite for enhanced microwave absorber performance. The thickness of MA is optimized to achieve the impedance matching condition by utilizing the CST microwave studio simulation and verified experimentally. The minimum reflection loss (R L) of −52.53 dB with effective absorber bandwidth (EAB) covering the complete X band at a 2.4 mm thickness is obtained for just 0.35 wt % CFCNT. The negligible change in R L and EAB after 1000 bending cycles and 2 h of water-bath sonication confirms the operating efficiency of MA in harsh environmental conditions. The mechanism of microwave absorption in the case of CF and CFCNT-based MA is elucidated concerning microwave properties, electrical conductivity, and morphology. The CST microwave studio simulation is also extended from the X band to the Ku band (12.4–18 GHz) for broadband microwave absorber application.

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Ti3C2/Ni2P/triphenyl phosphite as antioxidative microwave absorbers with excellent photothermal property

Cited by 19 publications

References 60 publications

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption

Constructing Interfacial Charge Transfer Channels and Electric Field in Violet Phosphorus-Based van der Waals Heterojunction for Phototherapy of Periodontitis

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

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Ti3C2/Ni2P/triphenyl phosphite as antioxidative microwave absorbers with excellent photothermal property

Cited by 19 publications

References 60 publications

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe2O4/MXene toward Efficient Microwave Absorption

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe2O4/MXene toward Efficient Microwave Absorption

Constructing Interfacial Charge Transfer Channels and Electric Field in Violet Phosphorus-Based van der Waals Heterojunction for Phototherapy of Periodontitis

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

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Product

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3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption

3D Lightweight Interconnected Melamine Foam Modified with Hollow CoFe₂O₄/MXene toward Efficient Microwave Absorption