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Bimetallic Metal–Organic Framework-Derived Pomegranate-like Nanoclusters Coupled with CoNi-Doped Graphene for Strong Wideband Microwave Absorption
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2020-04-01 , DOI: 10.1021/acsami.0c01572
Xueqing Xu 1 , Feitian Ran 1 , Zhimin Fan 1 , Zhongjun Cheng 1 , Tong Lv 2 , Lu Shao 1 , Yuyan Liu 1
Affiliation  

Metal–organic frameworks (MOFs) featuring high porosity and tunable structure make them become promising candidates to fabricate carbon-based microwave absorption (MA) materials to meet the requirements of electronic reliability and defense security. However, it is challenging to rationally design a well-organized micro-nanostructure to simultaneously achieve strong and wideband MA performance. Herein, a three-dimensional (3D) hierarchical nanoarchitecture ([email protected]/rGO-600) comprising pomegranate-like [email protected] nanoclusters and ultrasmall CoNi-decorated graphene has been successfully fabricated to broaden the absorption bandwidth and enhance the absorption intensity. The results confirm that the bimetallic MOF CoNi-BTC-derived pomegranate-like [email protected] nanoclusters with porous carbon shell as “peel” and sub-5 nm CoNi nanoparticles as “seeds” favor multiple polarization, magnetic loss, and impedance matching. Moreover, the interconnected 3D CoNi-doped graphene acts not only as a bridge to connect pomegranate-like [email protected] nanoclusters but also as a conductive network to supply multiple electron transportation paths. Consequently, the optimized [email protected]/rGO-600 exhibits extraordinary MA performance in terms of wide bandwidth (6.7 GHz) and strong absorption (−68.0 dB). As an effective strategy, this work provides a new insight into fabricating hierarchical composite structures for advancing MA performances and other applications.

中文翻译:

双金属金属-有机骨架衍生的石榴状纳米簇与掺CoNi的石墨烯结合在一起,可实现强宽带微波吸收

具有高孔隙率和可调结构的金属有机框架(MOF)使它们成为制造碳基微波吸收(MA)材料的有前途的候选者,以满足电子可靠性和国防安全的要求。但是,合理设计组织良好的微纳米结构以同时实现强大和宽带的MA性能具有挑战性。在这里,成功地制造了包含石榴状[电子邮件保护]纳米团簇和超小CoNi装饰的石墨烯的三维(3D)分层纳米体系结构([电子邮件保护] / rGO-600),以扩大吸收带宽并提高吸收强度。结果证实,双金属MOF CoNi-BTC衍生的石榴状[电子邮件保护]纳米团簇具有多孔碳壳作为“果皮”和亚5 nm CoNi纳米颗粒作为“种子”,有利于多重极化,磁损耗和阻抗匹配。此外,互连的3D CoNi掺杂石墨烯不仅充当连接石榴状[受电子邮件保护的]纳米团簇的桥梁,而且还充当提供多条电子传输路径的导电网络。因此,经过优化的[受电子邮件保护] / rGO-600在宽带宽(6.7 GHz)和强吸收(−68.0 dB)方面展现出非凡的MA性能。作为一项有效的策略,这项工作为构造分层复合结构提供了新的见解,以提高MA性能和其他应用程序。磁损耗和阻抗匹配。此外,互连的3D CoNi掺杂石墨烯不仅充当连接石榴状[受电子邮件保护的]纳米团簇的桥梁,而且还充当提供多条电子传输路径的导电网络。因此,经过优化的[受电子邮件保护] / rGO-600在宽带宽(6.7 GHz)和强吸收(−68.0 dB)方面展现出非凡的MA性能。作为一项有效的策略,这项工作为构造分层复合结构提供了新的见解,以提高MA性能和其他应用程序。磁损耗和阻抗匹配。此外,互连的3D CoNi掺杂石墨烯不仅充当连接石榴状[受电子邮件保护的]纳米团簇的桥梁,而且还充当提供多条电子传输路径的导电网络。因此,经过优化的[受电子邮件保护] / rGO-600在宽带宽(6.7 GHz)和强吸收(−68.0 dB)方面展现出非凡的MA性能。作为一项有效的策略,这项工作为构造分层复合结构提供了新的见解,以提高MA性能和其他应用程序。经过优化的[受电子邮件保护] / rGO-600在宽带宽(6.7 GHz)和强吸收(−68.0 dB)方面展现出非凡的MA性能。作为一项有效的策略,这项工作为构造分层复合结构提供了新的见解,以提高MA性能和其他应用程序。经过优化的[受电子邮件保护] / rGO-600在宽带宽(6.7 GHz)和强吸收(−68.0 dB)方面展现出非凡的MA性能。作为一项有效的策略,这项工作为构造分层复合结构提供了新的见解,以提高MA性能和其他应用程序。
更新日期:2020-04-01
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