Xueqing Xu*, Deshun Li, Qiyun Mu, Xiaorong Yang, Rui Su, Qian Yang, Ziqiang Lei and Zhiwang Yang*,
{"title":"由掺杂镍钴合金的互连碳纳米管构建的纳米封闭磁网络可增强电磁波吸收性能","authors":"Xueqing Xu*, Deshun Li, Qiyun Mu, Xiaorong Yang, Rui Su, Qian Yang, Ziqiang Lei and Zhiwang Yang*, ","doi":"10.1021/acsanm.4c02122","DOIUrl":null,"url":null,"abstract":"<p >Metal–organic framework (MOF)-derived magnetic metal/carbon nanocomposites have evolved as prospective functional materials with application in the electromagnetic wave (EMW) absorption field due to their tailorable dielectric–magnetic characteristic. Nonetheless, a significant challenge remains in regulating the microstructure of MOF-derived nanomaterials to acquire excellent EMW absorption. Herein, NiCo alloy and N-doped bamboo-like carbon nanotube network (NiCo@CNTs/NC) magnetic–dielectric composites were fabricated using a one-dimensional (1D) NiCo-MOF nanobelt as precursor through a one-step melamine-assisted pyrolyzing process. The interconnected carbon nanotube network structure offers multiple electronic migration and hop paths and effectively facilitates conductive loss. The adjustable Ni/Co nodes in the 1D MOFs were effectively transformed into NiCo alloy nanoparticles and confined within the tips of the in situ-generated interconnected CNT networks. Such well-dispersed and nanoconfined magnetic NiCo nanoparticles generate a nanoscale magnetic coupling network and provide a high density of polarized sites, reinforcing the magnetic–dielectric coupling ability as well as triggering interfacial polarization. Consequently, the optimized NiCo@CNTs/NC-20/1 composite achieves glorious EMW absorption with a strong reflection loss (RL<sub>max</sub>) of −30.31 dB at only 1.4 mm thickness and an effective absorption bandwidth as wide as 4.5 GHz at 1.6 mm thickness when the filling fraction is 20 wt %. Considering the excellent EMW absorption properties, we believe that this work will provide new insights into the design of magnetic metal/carbon nanocomposites that enhance EMW absorption properties through the reasonable construction of low-dimensional interconnected magnetic–dielectric networks with magnetic nanoparticles in nanoconfined spaces.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 11","pages":"13611–13624"},"PeriodicalIF":5.5000,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nanoconfined Magnetic Network Constructed by a NiCo Alloy Doped Interconnected Carbon Nanotube toward Enhanced Electromagnetic Wave Absorption Performance\",\"authors\":\"Xueqing Xu*, Deshun Li, Qiyun Mu, Xiaorong Yang, Rui Su, Qian Yang, Ziqiang Lei and Zhiwang Yang*, \",\"doi\":\"10.1021/acsanm.4c02122\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Metal–organic framework (MOF)-derived magnetic metal/carbon nanocomposites have evolved as prospective functional materials with application in the electromagnetic wave (EMW) absorption field due to their tailorable dielectric–magnetic characteristic. Nonetheless, a significant challenge remains in regulating the microstructure of MOF-derived nanomaterials to acquire excellent EMW absorption. Herein, NiCo alloy and N-doped bamboo-like carbon nanotube network (NiCo@CNTs/NC) magnetic–dielectric composites were fabricated using a one-dimensional (1D) NiCo-MOF nanobelt as precursor through a one-step melamine-assisted pyrolyzing process. The interconnected carbon nanotube network structure offers multiple electronic migration and hop paths and effectively facilitates conductive loss. The adjustable Ni/Co nodes in the 1D MOFs were effectively transformed into NiCo alloy nanoparticles and confined within the tips of the in situ-generated interconnected CNT networks. Such well-dispersed and nanoconfined magnetic NiCo nanoparticles generate a nanoscale magnetic coupling network and provide a high density of polarized sites, reinforcing the magnetic–dielectric coupling ability as well as triggering interfacial polarization. Consequently, the optimized NiCo@CNTs/NC-20/1 composite achieves glorious EMW absorption with a strong reflection loss (RL<sub>max</sub>) of −30.31 dB at only 1.4 mm thickness and an effective absorption bandwidth as wide as 4.5 GHz at 1.6 mm thickness when the filling fraction is 20 wt %. Considering the excellent EMW absorption properties, we believe that this work will provide new insights into the design of magnetic metal/carbon nanocomposites that enhance EMW absorption properties through the reasonable construction of low-dimensional interconnected magnetic–dielectric networks with magnetic nanoparticles in nanoconfined spaces.</p>\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":\"7 11\",\"pages\":\"13611–13624\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2024-05-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsanm.4c02122\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.4c02122","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Nanoconfined Magnetic Network Constructed by a NiCo Alloy Doped Interconnected Carbon Nanotube toward Enhanced Electromagnetic Wave Absorption Performance
Metal–organic framework (MOF)-derived magnetic metal/carbon nanocomposites have evolved as prospective functional materials with application in the electromagnetic wave (EMW) absorption field due to their tailorable dielectric–magnetic characteristic. Nonetheless, a significant challenge remains in regulating the microstructure of MOF-derived nanomaterials to acquire excellent EMW absorption. Herein, NiCo alloy and N-doped bamboo-like carbon nanotube network (NiCo@CNTs/NC) magnetic–dielectric composites were fabricated using a one-dimensional (1D) NiCo-MOF nanobelt as precursor through a one-step melamine-assisted pyrolyzing process. The interconnected carbon nanotube network structure offers multiple electronic migration and hop paths and effectively facilitates conductive loss. The adjustable Ni/Co nodes in the 1D MOFs were effectively transformed into NiCo alloy nanoparticles and confined within the tips of the in situ-generated interconnected CNT networks. Such well-dispersed and nanoconfined magnetic NiCo nanoparticles generate a nanoscale magnetic coupling network and provide a high density of polarized sites, reinforcing the magnetic–dielectric coupling ability as well as triggering interfacial polarization. Consequently, the optimized NiCo@CNTs/NC-20/1 composite achieves glorious EMW absorption with a strong reflection loss (RLmax) of −30.31 dB at only 1.4 mm thickness and an effective absorption bandwidth as wide as 4.5 GHz at 1.6 mm thickness when the filling fraction is 20 wt %. Considering the excellent EMW absorption properties, we believe that this work will provide new insights into the design of magnetic metal/carbon nanocomposites that enhance EMW absorption properties through the reasonable construction of low-dimensional interconnected magnetic–dielectric networks with magnetic nanoparticles in nanoconfined spaces.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.