Using Silk-derived Magnetic Carbon Nanocomposites as Highly Efficient Nanozymes and Electromagnetic Absorbing Agents
Using Silk-derived Magnetic Carbon Nanocomposites as Highly Efficient Nanozymes and Electromagnetic Absorbing Agents
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使用丝衍生的磁性碳纳米复合材料作为高效纳米酶和电磁吸收剂
DOI：
10.1016/j.cclet.2022.108084
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发表时间：
2022-12
影响因子：
9.1
通讯作者：
Youhui Lin
中科院分区：
文献类型：
--
作者：
Hao Wang;Xianhui Zhang;Yonghua Tang;Weifeng Rong;Jiachen Zhao;Chaoyu Fan;Zhisen Zhang;Zhijun Sun;Yun Yang;Youhui Lin
功能碳纳米材料已成为电子、能源、催化、成像、传感、生物医学等多个活跃研究领域的明星。本文提出了一种简便的一锅法制备掺氮碳纳米片(Fe-N-CNS)铁磁性纳米颗粒的方法，即通过盐辅助高温碳化天然丝蛋白。由于其石墨化结构、氮掺杂和铁磁性纳米颗粒(FeNx、FeOy、FeCz)，丝状Fe-N-CNS可以很好地模拟过氧化物酶和氧化物酶。Fe-N-CNS结合了类石墨烯结构和类酶活性的特点，可进一步应用于高效脱色、吸附和降解染料。同时，制备的具有本征磁性和导电性的Fe-N-CNS也可以作为一种有效的电磁波吸收剂。最大有效吸收带宽为6.73千兆赫，厚度为1 mm，最大反射损耗为−37.33Gb(11.41千兆赫)。EAB可以覆盖2∼18 GHz，吸收层厚度从1.0 mm到5.0 mm可调。总体而言，Fe-N-CNS作为一种双功能材料，可以解决日益严重的染料和电磁波环境污染问题。
Functional carbon nanomaterials have become the stars of many active research fields, such as electronics, energy, catalysis, imaging, sensing and biomedicine. Herein, a facile and one-pot strategy for generating ferromagnetic nanoparticles loaded on N-doped carbon nanosheets (Fe-N-CNS) is presented by salt-assisted high-temperature carbonization of natural silk proteins. Due to their graphitic structures, N-doping and ferromagnetic nanoparticles (FeNx, FeOy, FeCz), the silk-derived Fe-N-CNS can act as excellent mimics of both peroxidase and oxidase. Benefiting from the combined character of the graphene-like structures and enzyme-like activities, Fe-N-CNS can be further applied to highly efficient dye removalviasynergistic adsorption and degradation. Meanwhile, the as-prepared Fe-N-CNS with intrinsic magnetism and electrical conductivity can also serve as an efficient electromagnetic wave absorption agent. The broadest effective absorption bandwidth (EAB) of as-obtained absorbing material yields a 6.73 GHz with 1 mm thickness, with a maximum reflection loss of −37.33 dB (11.41 GHz). The EAB can cover 2∼18 GHz with a tunable absorber thickness from 1.0 mm to 5.0 mm. Collectively, Fe-N-CNS, as a dual-functional material, can tackle the aggravating environmental pollution issues of both dyes and electromagnetic waves.
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