{"title":"稀土诱导的多尺度双相介质分层材料实现了轻量化和宽带电磁响应","authors":"Jun Huang , Yuyan Chen , Nuohua Xie, Xiaojun Zeng","doi":"10.1016/j.carbon.2025.120896","DOIUrl":null,"url":null,"abstract":"<div><div>The lightweight, broadband, and electromagnetically responsive materials attract growing attention. The high-value-added utilization of rare earth modification offers a promising approach for this need. However, the uncontrollable generation and inherent homogeneity of rare earths limit the enhancement of electromagnetic wave (EMW) absorption performance. Here, we develop a promising rare earth (La)-induced two-dimensional (2D) MXene-derived multiscale, dual-phase dielectric TiO<sub>2</sub> strategy. This strategy achieves the coupling of zero-dimensional (0D) large-scale anatase (A-TiO<sub>2</sub>) and small-scale rutile (R-TiO<sub>2</sub>) with one-dimensional (1D) porous nitrogen-doped carbon (PCN) nanofibers (NFs). This strategy effectively modulates the dielectric behavior of MXene/PCN NFs and promotes the formation of 0D/1D/2D multilevel heterogeneous interfaces, achieving lightweight, broadband, and highly efficient EMW absorption properties, with a reflection loss (<em>R</em><sub>L</sub>) value of −61.55 dB and a wide effective absorption bandwidth (EAB) of 5.7 GHz at thin thickness of 1.95 mm. Furthermore, this strategy was achieved through a synergistic electrospinning and thermal treatment process, effectively embedding 0D TiO<sub>2</sub> nanoparticles, La-based species, and 2D MXene nanosheets into 1D PCN NFs. Consequently, favorable interface polarization, conduction loss, and dipole polarization contribute to the outstanding radar stealth properties of the PCN/MXene-La composite. This strategy demonstrates a rare earth-modified approach for interface engineering and morphological engineering of materials, providing a new paradigm for the rational design of rare earth-enhanced electromagnetic behavior.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120896"},"PeriodicalIF":11.6000,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rare earth-induced multiscale dual-phase dielectric hierarchical materials enabled lightweight and broadband electromagnetic response\",\"authors\":\"Jun Huang , Yuyan Chen , Nuohua Xie, Xiaojun Zeng\",\"doi\":\"10.1016/j.carbon.2025.120896\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The lightweight, broadband, and electromagnetically responsive materials attract growing attention. The high-value-added utilization of rare earth modification offers a promising approach for this need. However, the uncontrollable generation and inherent homogeneity of rare earths limit the enhancement of electromagnetic wave (EMW) absorption performance. Here, we develop a promising rare earth (La)-induced two-dimensional (2D) MXene-derived multiscale, dual-phase dielectric TiO<sub>2</sub> strategy. This strategy achieves the coupling of zero-dimensional (0D) large-scale anatase (A-TiO<sub>2</sub>) and small-scale rutile (R-TiO<sub>2</sub>) with one-dimensional (1D) porous nitrogen-doped carbon (PCN) nanofibers (NFs). This strategy effectively modulates the dielectric behavior of MXene/PCN NFs and promotes the formation of 0D/1D/2D multilevel heterogeneous interfaces, achieving lightweight, broadband, and highly efficient EMW absorption properties, with a reflection loss (<em>R</em><sub>L</sub>) value of −61.55 dB and a wide effective absorption bandwidth (EAB) of 5.7 GHz at thin thickness of 1.95 mm. Furthermore, this strategy was achieved through a synergistic electrospinning and thermal treatment process, effectively embedding 0D TiO<sub>2</sub> nanoparticles, La-based species, and 2D MXene nanosheets into 1D PCN NFs. Consequently, favorable interface polarization, conduction loss, and dipole polarization contribute to the outstanding radar stealth properties of the PCN/MXene-La composite. This strategy demonstrates a rare earth-modified approach for interface engineering and morphological engineering of materials, providing a new paradigm for the rational design of rare earth-enhanced electromagnetic behavior.</div></div>\",\"PeriodicalId\":262,\"journal\":{\"name\":\"Carbon\",\"volume\":\"246 \",\"pages\":\"Article 120896\"},\"PeriodicalIF\":11.6000,\"publicationDate\":\"2025-09-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Carbon\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0008622325009121\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008622325009121","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
The lightweight, broadband, and electromagnetically responsive materials attract growing attention. The high-value-added utilization of rare earth modification offers a promising approach for this need. However, the uncontrollable generation and inherent homogeneity of rare earths limit the enhancement of electromagnetic wave (EMW) absorption performance. Here, we develop a promising rare earth (La)-induced two-dimensional (2D) MXene-derived multiscale, dual-phase dielectric TiO2 strategy. This strategy achieves the coupling of zero-dimensional (0D) large-scale anatase (A-TiO2) and small-scale rutile (R-TiO2) with one-dimensional (1D) porous nitrogen-doped carbon (PCN) nanofibers (NFs). This strategy effectively modulates the dielectric behavior of MXene/PCN NFs and promotes the formation of 0D/1D/2D multilevel heterogeneous interfaces, achieving lightweight, broadband, and highly efficient EMW absorption properties, with a reflection loss (RL) value of −61.55 dB and a wide effective absorption bandwidth (EAB) of 5.7 GHz at thin thickness of 1.95 mm. Furthermore, this strategy was achieved through a synergistic electrospinning and thermal treatment process, effectively embedding 0D TiO2 nanoparticles, La-based species, and 2D MXene nanosheets into 1D PCN NFs. Consequently, favorable interface polarization, conduction loss, and dipole polarization contribute to the outstanding radar stealth properties of the PCN/MXene-La composite. This strategy demonstrates a rare earth-modified approach for interface engineering and morphological engineering of materials, providing a new paradigm for the rational design of rare earth-enhanced electromagnetic behavior.
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.