Green Synthesis of Composite Graphene Aerogels with Robust Magnetism for Effective Water Remediation
Green Synthesis of Composite Graphene Aerogels with Robust Magnetism for Effective Water Remediation
复制标题
绿色合成具有强磁性的复合石墨烯气凝胶，用于有效的水体修复
DOI：
10.3390/ma12244106
复制
发表时间：
2019-12-02
期刊：
影响因子：
3.4
通讯作者：
Ge, Jianlong
中科院分区：
文献类型：
--
作者：
Liu, Qixia;Hu, Shiqi;Ge, Jianlong
石墨烯基三维磁性组装体由于其继承了石墨烯组装体和磁性材料的多种性质而引起了人们的广泛关注。然而，目前石墨烯基磁性材料的实际应用受到相对复杂的合成过程和苛刻的操作条件的限制。因此，非常需要一种简便且绿色的合成策略。本文采用绿色、简便的方法制备了磁性石墨烯气凝胶，并在其骨架表面原位合成了磁性纳米颗粒。合成过程在温和条件下进行，能耗低。所得石墨烯气凝胶表现出上级磁性，饱和磁化强度为55.7 emug（-1）。所制备的复合气凝胶具有良好的孔结构、高比表面积和稳定的磁性，对水中有机染料具有良好的吸附和光Fenton催化降解性能。此外，由于其有效的磁分离性能，所利用的石墨烯气凝胶可以从水中回收，这表明在水修复领域的实际应用前景广阔。我们期望这种综合策略可以为三维磁性组件的设计和开发提供一些指导。
Graphene-based three-dimensional (3D) magnetic assemblies have attracted great research attention owing to their multiple natures inherited from 3D graphene assemblies and magnetic materials. However, at present, the practical applications of graphene-based magnetic materials are limited by the relative complex synthesis procedure and harsh operation conditions. Hence, a facile and green synthesis strategy is highly desired. Herein, a magnetic graphene aerogel with magnetite nanoparticles in-situ synthesized on the surface of its frameworks was fabricated through a green and facile strategy. The synthesis process was performed in a gentle condition with low energy consumption. The obtained graphene aerogels exhibited superior magnetism with a saturation magnetization of 55.7 emug(-1). With the merits of well-developed pore structures, high surface area, and robust magnetic property, the obtained composite aerogels exhibited intriguing adsorption and photo-Fenton catalytic degradation performances for the organic dyes in water. Moreover, the utilized graphene aerogels could be recycled from the water due to their effective magnetic separation performance, indicating a promising capability for practical applications in the area of water remediation. We anticipate this synthesis strategy could provide some guidance for the design and development of 3D magnetic assemblies.