Abstract
Hollow metal ion-phenolic capsules (HMPCs) were synthesized through the combination of chelation with multiple hydrogen bonding that derive from the interaction of tannic acid (TA) and Pluronic F127. In this strategy, TA, a renewable and natural polyphenol, plays main role in the whole reaction process: a) create the “TA/F127 emulsion” driven by the multiple hydrogen bonding; b) construct the skeleton of HMPCs via the coordination with CuⅡ. Furthermore, we expanded this advanced concept into the fabrication of metal-doped hollow mesoporous carbon spheres (MHMCSs) elegantly and obtained Cu-Fe co-doped hollow mesoporous carbon spheres with 3.9 nm pore size and high specific surface area (365 m2/g). Compared to existing technology, the redundant treatments (e.g. hydrothermal treatment, sacrificial template removal and quite long reaction time) and toxic raw materials (e.g. formaldehyde, resorcinol) have been abandoned. Full green concept throughout the whole synthesis process presents an elegant paradigm for the preparation of HMPCs and MHMCSs.
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