通过一种简易的方法制备了基于还原氧化石墨烯的油水分离膜:首先使用简单的浸泡方法将氧化石墨烯覆盖到滤纸上,然后在180℃下加热2h,对氧化石墨烯的热处理使滤纸由亲水表面转化成疏水表面,并用X射线光电子能谱和接触角测量仪对其进行了表征。分别针对分离膜的孔径、处理温度及分离性能进行了系统研究。结果表明,制备的油水分离滤纸具有很好的稳定性和重复使用性,对不同种类的油与水的混合物的分离效率大于96%。同时,在多次重复测量及长期常温保存后仍然保持较高的通量。这种简易方法制备的油水分离材料在环境保护方面具有广阔的应用前景。
A simple approach was used for the preparation of oil/water separation material based on the reduced graphene oxide.We firstly coated filter paper with graphene oxide(GO) by simple soaking method,and performed thermal annealing at 180℃ for 2 hours to form stable hydrophobic reduced graphene oxide(RGO) coating.The separation materials were characterized by X-ray photoelectron spectroscopy(XPS) and water contact angles.The as-prepared separation filter paper had excellent stability and reusability,the separation selectivity was above 96% for a variety of mixtures of oil and water.Meanwhile,the paper showed stable and robust hydrophobic properties including the stability of repeat measurements and long-term storage.It was expected that this materials can find more practical applications,especially in the oil/water separation.
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基金资助
国家自然科学基金(21404081);北京分子科学国家实验室开放课题基金(20140419)
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