Bio‐inspired method to fabricate poly‐dopamine/reduced graphene oxide composite membranes for dyes and heavy metal ion removal
Bio‐inspired method to fabricate poly‐dopamine/reduced graphene oxide composite membranes for dyes and heavy metal ion removal
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DOI：
10.1002/pat.4205
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发表时间：
2018-02
影响因子：
3.4
通讯作者：
Jing Ma;Yi He;Guangyong Zeng;Fei Li;Yubin Li;Jian-Ying Xiao;Shuizhen Yang
中科院分区：
文献类型：
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作者：
Jing Ma;Yi He;Guangyong Zeng;Fei Li;Yubin Li;Jian-Ying Xiao;Shuizhen Yang
由于层间距窄，氧化石墨烯（GO）复合膜在废水处理过程中通常表现出相对较低的水通量。在这项研究中，通过仿生方法将GO还原为还原氧化石墨烯，并通过聚多巴胺（PDA）进行功能化修饰。然后通过真空过滤在醋酸纤维素膜表面（-0.1MPa压力）制备一系列PDA/还原氧化石墨烯片膜。结果表明，由于 PDA 的交联，新型膜具有优异的稳定性。此外，PDA改性后膜的亲水性显着增加，呈现出比纯GO复合膜更优异的水通量。更重要的是，所制备的膜成功应用于去除模拟废水中的染料（包括刚果红、亚甲蓝和罗丹明B）和重金属离子（Cu（II））。该工作可能为GO复合膜的制备和应用提供新的方法。
Due to the narrow layer spacing, graphene oxide (GO) composite membrane usually exhibits a relatively low water flux in the process of wastewater treatment. In this study, GO was reduced to reduced graphene oxide through a bio‐inspired method, which was functionalized modified by poly‐dopamine (PDA). Then a series of PDA/reduced graphene oxide sheet films were prepared by vacuum filtration on the surface of cellulose acetate membrane (under the pressure of −0.1 MPa). The result indicated that the novel membranes had an excellent stability owing to the cross‐link of PDA. In addition, the hydrophilicity of membrane was increased significantly after PDA modification, which presented a superior water flux than pure GO composite membrane. More importantly, as‐prepared membranes were successfully applied for the removal of dyes (including Congo red, methylene blue, and rhodamine B) and heavy mental ion (Cu(II)) from simulated wastewater. This work might provide a new method for preparation and application of GO composite membranes.