两亲性
催化作用
石墨烯
掺杂剂
材料科学
溶剂
化学
化学工程
纳米技术
有机化学
兴奋剂
聚合物
复合材料
共聚物
光电子学
工程类
作者
Xiaoguo Song,Yiying Chen,Mingcong Rong,Zhaoxiong Xie,Tingting Zhao,Yiru Wang,Xi Chen,Otto S. Wolfbeis
标识
DOI:10.1002/ange.201511064
摘要
Abstract 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.
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