Inherent N-Doped Honeycomb-like Carbon/Fe3O4 Composites with Versatility for Efficient Microwave Absorption and Wastewater Treatment
Inherent N-Doped Honeycomb-like Carbon/Fe3O4 Composites with Versatility for Efficient Microwave Absorption and Wastewater Treatment
复制标题
DOI：
10.1021/acssuschemeng.9b00067
复制
发表时间：
2019-05-20
影响因子：
8.4
通讯作者：
Cui, Li
中科院分区：
文献类型：
--
作者：
Guo, Lin;An, Qing-Da;Cui, Li
据我们所知，利用壳聚糖衍生的材料在微波吸收目前是稀缺的。本文首次以壳聚糖为碳源和氮源，通过简单的方法充分利用其潜在的性能，可控地制备了具有良好通用性的N掺杂蜂窝状碳/Fe 3 O 4复合材料，可有效地处理微波干扰甚至废水污染。当填料含量仅为10%时，其最小反射损耗可达-59.5 dB，最大有效吸收带宽为5.36 GHz。除了主要的尝试，另一个功能的废水处理也表现出优异的有毒Cr（VI）吸附和过氧单硫酸盐活化有机污染物（偶氮染料橙子II）降解。更重要的是，嵌入的磁性组件使得其便于与测试溶液磁性分离。总之，本研究以简单的方法制备出的N掺杂蜂窝状碳/Fe 3 O 4复合材料不仅为壳聚糖的多样化利用开辟了一条新的途径，而且可能对上级微波吸收材料和环境修复材料的设计甚至合成具有一定的指导意义。
To our knowledge, the utilization of chitosan-derived materials in microwave absorbing is currently scarce. Herein, for the first time, by fully exploiting its potential properties via facile means, chitosan was employed as the exclusive joint source of carbon and nitrogen, and the inherent N-doped honeycomb-like carbon/Fe3O4 composites with favorable versatility that can efficiently treat microwave interference and even wastewater pollution were controllably prepared. The optimal microwave absorbency is attractive, of which the minimum reflecting loss reaches to -59.5 dB, and the maximum effective absorbing bandwidth is 5.36 GHz when filler content is only 10%. Beyond the major trying, another function for wastewater treatment was also demonstrated by excellent toxic Cr(VI) adsorption and peroxymonosulfate activation for organic pollutants (azo-dye Orange II) degradation. More significantly, the embedding magnetic component makes it convenient to be magnetically separated from the testing solution. Totally, these N-doped honeycomb-like carbon/Fe3O4 composites with versatility prepared by simple methods not only open a new road for the diversified utilization of chitosan but also would possibly make a referrable guidance to the design or even synthesis for superior microwave absorption and environmental remediating materials.