Hierarchically Porous Carbon Materials from Self-Assembled Block Copolymer/Dopamine Mixtures

Cindy M. Septani, Chen An Wang, U. Ser Jeng, Yu Chia Su, Bao Tsan Ko, Ya Sen Sun

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

Hierarchically porous carbon materials with interconnected frameworks of macro- A nd mesopores are desirable for electrochemical applications in biosensors, electrocatalysis, and supercapacitors. In this study, we report a facile synthetic route to fabricate hierarchically porous carbon materials by controlled macro- A nd mesophase separation of a mixture of polystyrene-block-poly(ethylene) and dopamine. The morphology of mesopores is tailored by controlling the coassembly of PS-b-PEO and dopamine in the acidic tetrahydrofuran-water cosolvent. HCl addition plays a critical role via enhancing the charge-dipole interactions between PEO and dopamine and suppressing the clustering and chemical reactions of dopamine in solution. As a result, subsequent drying can produce interpenetrated PS-b-PEO/DA mixtures without forming dopamine microsized crystallites. Dopamine oxidative polymerization induced by solvent annealing in NH4OH vapor enables the formation of percolating macropores. Subsequent pyrolysis to selectively remove the PS-b-PEO template from the complex can produce hierarchically porous carbon materials with interconnected frameworks of macro- A nd mesopores when pyrolysis is implemented at a low temperature or when DA is a minor component.

原文???core.languages.en_GB???
頁(從 - 到)11754-11764
頁數11
期刊Langmuir
36
發行號40
DOIs
出版狀態已出版 - 13 10月 2020

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