石墨烯
膜
聚酰胺
氧化物
表面改性
材料科学
薄膜复合膜
化学工程
纳米技术
化学
高分子化学
反渗透
生物化学
工程类
冶金
作者
François Perreault,Marissa E. Tousley,Menachem Elimelech
出处
期刊:Environmental Science and Technology Letters
[American Chemical Society]
日期:2013-12-12
卷期号:1 (1): 71-76
被引量:461
摘要
Fouling of membranes by microorganisms is a major limiting factor in membrane separation processes. Novel strategies are therefore required to decrease the extent of bacterial growth on membranes. In this study, we confer strong antimicrobial properties to thin-film composite polyamide membranes by a simple graphene oxide surface functionalization. Using amide coupling between carboxyl groups of graphene oxide and carboxyl groups of the polyamide active layer, graphene oxide is irreversibly bound to the membrane. Surface binding of graphene oxide is demonstrated by scanning electron microscopy and Raman spectroscopy. Direct contact of bacteria with functionalized graphene oxide on the membrane surface results in 65% bacterial inactivation after 1 h of contact time. This bactericidal effect is imparted to the membrane without any detrimental effect to the intrinsic membrane transport properties. Our results suggest that functionalization of thin-film composite membranes with graphene oxide nanosheets is a promising approach for the development of novel antimicrobial membranes.
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