科研动态 Research Highlight

超双亲三维石墨烯泡沫的制备与研究进展
A Phytic Acid-Induced Super-Amphiphilic Multifunctional 3D Graphene-Based Foam
发布日期:2016-3-10      浏览次数:1039

陈曦教授课题组在三维石墨烯材料制备方面取得重要进展,相关成果以“A Phytic Acid-Induced Super-Amphiphilic Multifunctional 3D Graphene-Based Foam”发表在Angew. Chem. Int. Ed.DOI: 10.1002/ange.201511064)。

课题组受到自然多种多样的生物质的启发,选取多羟基的植酸作为凝胶剂,掺杂剂和表面修饰剂,与氧化石墨烯反应,通过水热合成的简单法得到一种新型的超亲水同时超亲油的三维石墨烯泡沫(PAGF),这也是首次合成出具有超双亲性能的三维石墨烯材料。所得超双亲PAGF内部疏松多孔,并且对水、油具有零接触角,具备对水/油超浸润的双亲特性,克服了以往三维石墨烯浸润性单一的缺点。该三维石墨烯泡沫对水、油和有机物等多种类液体具有很高的吸附容量,可应用于对水体污染物的吸附与富集等环境修复方面;同时利用其超双亲特性,可将催化剂粒子包埋于其中进而应用于水/油两相的界面催化中,不但具有很好的催化效果,还可以通过简单的处理使其重复使用。

本篇论文主要工作由博士生宋昕鸿完成,硕士生陈毅颖等参与了相关材料的制备,谢兆雄教授和任斌教授也给予了相关理论指导。研究工作得到国家自然科学基金(项目批准号:2137511221521004),教育部长江学者和创新团队发展计划,福建省海洋与渔业厅海洋高新产业发展专项,福建省重大科技项目等相关项目的支持。

摘要: Surfaces with super-amphiphilicity have attracted tremendous interest for fundamental and applied research owing to their special affinity to both oil and water. It is generally believed that 3D graphenes are monoliths with strongly hydrophobic surfaces. Herein, we demonstrate the preparation of a 3D super-amphiphilic (that is, highly hydrophilic and oleophilic) graphene-based assembly in a single-step using phytic acid acting as both a gelator and as a dopant. The product shows both hydrophilic and oleophilic intelligence, and this overcomes the drawbacks of presently known hydrophobic 3D graphene assemblies. It can absorb water and oils alike. The utility of the new material was demonstrated by designing a heterogeneous catalytic system through incorporation of a zeolite into its amphiphilic 3D scaffold. The resulting bulk network was shown to enable efficient epoxidation of alkenes without prior addition of a co-solvent or stirring. This catalyst also can be recovered and re-used, thereby providing a clean catalytic process with simplified work-up.

论文链接:http://onlinelibrary.wiley.com/doi/10.1002/anie.201511064/epdf