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首页> 外文期刊>RSC Advances >Eco-friendly and facile one-step synthesis of a three dimensional net-like magnetic mesoporous carbon derived from wastepaper as a renewable adsorbent
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Eco-friendly and facile one-step synthesis of a three dimensional net-like magnetic mesoporous carbon derived from wastepaper as a renewable adsorbent

机译：生态友好型和容易的一步合成三维网状磁性介孔碳衍生自废纸作为可再生吸附剂

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摘要

Millions of tons of paper and its derivatives are annually wasted without being recycled and reused. To promote the comprehensive utilization of resources and eco-friendly preparation, waste filter paper, printer paper, and napkins were chosen as carbon sources to one-step synthesize three types of three dimensional (3D) net-like magnetic mesoporous carbon (MMC) by an eco-friendly and low-cost method. These mesoporous (3.90–7.68 nm) composites have a high specific surface area (287–423 m ~(2) g ~(?1) ), well-developed porosity (0.24–0.74 cm ~(3) g ~(?1) ) and abundant oxygen-containing functional groups. Compared to the other two composites, the adsorbent derived from filter paper showed the highest adsorption capacity towards methylene blue (MB) ( q _(max) = 332.03 mg g ~(?1) ) and rhodamine B (RhB) ( q _(max) = 389.59 mg g ~(?1) ) with a high adsorption rate (<5 min). According to the effect of pH value on adsorption capacity, and combining the analysis of Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy, the main adsorption mechanisms can be summarized as hydrogen bonds, electrostatic interactions, and π–π interaction. Besides, the occurrence of redox reactions between Fe ~(2+) /Fe ~(0) and dye cannot be ignored. Finally, experiments on reusability were performed. They showed that the 3D net-like MMC could be easily regenerated and still maintained a removal efficiency of above 80% for RhB and 90% for MB after five cycles.
机译：每年浪费数百万吨纸及其衍生物而不会再循环和重复使用。为了促进资源的综合利用和环保准备，废物滤纸，打印机纸和餐巾作为碳源，以一步为三维三维（3D）网磁性介孔碳（MMC）一种环保和低成本的方法。这些中孔（3.90-7.68nm）复合材料具有高比表面积（287-423m〜（2）g〜（α1）），发育良好的孔隙度（0.24-0.74cm〜（3）g〜（？1 ）））和含有丰富的含氧官能团。与其他两种复合材料相比，衍生自滤纸的吸附剂显示出甲基蓝（Mb）的最高吸附能力（Q _（max）= 332.03mg g〜（α1））和罗丹明b（rhb）（q _（最大）= 389.59mg g〜（α1））具有高吸附速率（<5分钟）。根据pH值对吸附容量的影响，并结合傅里叶变换红外光谱和X射线光电子谱的分析，主要吸附机构可以概括为氢键，静电相互作用和π-π相互作用。此外，不能忽略Fe〜（2+）/ Fe〜（0）和染料之间的氧化还原反应的发生。最后，进行了可重用性的实验。他们表明，3D网状MMC可以很容易再生，并且在五个循环后，MB的rhb仍然保持高于80％的去除效率。

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