Ultrasonic-microwave assisted synthesis of stable reduced graphene oxide modified melamine foam with superhydrophobicity and high oil adsorption capacities
Ultrasonic-microwave assisted synthesis of stable reduced graphene oxide modified melamine foam with superhydrophobicity and high oil adsorption capacities
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DOI：
10.1016/j.cej.2016.07.086
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发表时间：
2016-12-15
影响因子：
15.1
通讯作者：
Lu, Zhong
中科院分区：
文献类型：
--
作者：
Song, Shuang;Yang, Hao;Lu, Zhong
本文首次报道了通过超声-微波协同法制备可回收、稳定且具有成本效益的超疏水性还原氧化石墨烯改性三聚氰胺泡沫（RGMF）。在合成过程中，超声波和微波辐射不仅缩短了还原剂存在下氧化石墨烯（GO）的还原时间，而且显著提高了还原后氧化石墨烯（rGO）锚定在三聚氰胺泡沫（MF）上的牢固性。采用XRD、拉曼光谱、SEM和接触角测试等方法对RGMF的结构和性能进行了表征。结果表明，MF的骨架完全被rGO层所覆盖，rGO层致密且充满褶皱。所制备的RGMF是超疏水的，无需进一步修饰。此外，RGMF对水中各种油类和有机溶剂表现出良好的选择性吸附能力。最大吸油量为初始MF重量的112倍，重复使用20次后，RGMF的吸油量没有下降。更重要的是，RGMF显示出良好的抗空蚀和腐蚀液体的稳定性。所有这些特征使得所制备的材料成为从水中去除和收集油和有机溶剂的理想候选者。(C)© 2016 Elsevier B. V.版权所有。
We herein report the fabrication of recyclable, stable and cost-effective superhydrophobic reduced graphene oxide modified melamine foam (RGMF) through ultrasonic-microwave synergistic method for the first time. In the synthesis process, ultrasonic and microwave irradiation not only shortened the reduction time of graphene oxide (GO) with the existence of reducing agent, but also considerably enhanced the firmness of reduced graphene oxide (rGO) anchored onto the melamine foam (MF). The structure and property of the obtained RGMF were characterized by XRD, Raman, SEM and contact angle measurements. The results showed that the skeletons of MF were completely covered with rGO layers which were compact and full of wrinkles. The as-prepared RGMF was superhydrophobic without further modification. Besides, the RGMF showed excellent selective adsorption capacity of various oils and organic solvents from water. The maximum oil adsorption capacity was 112 times of the weight of the initial MF, and the adsorption capacity of the RGMF did not deteriorate after it was reused 20 times. More importantly, the RGMF showed good stability against cavitation erosion and corrosion liquids. All these features made the as-prepared material an ideal candidate for removal and collection of oils and organic solvents from water. (C) 2016 Elsevier B.V. All rights reserved.