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A Molecular Pillar Approach To Grow Vertical Covalent Organic Framework Nanosheets on Graphene: Hybrid Materials for Energy Storage
Author(s) -
Sun Jinhua,
Klechikov Alexey,
Moise Calin,
Prodana Mariana,
Enachescu Marius,
Talyzin Alexandr V.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201710502
Subject(s) - graphene , supercapacitor , materials science , covalent bond , covalent organic framework , hybrid material , nucleation , nanotechnology , oxide , nanostructure , carbon fibers , electrode , carbon nanotube , energy storage , porosity , chemical engineering , electrochemistry , composite number , composite material , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering , metallurgy
Abstract Hybrid 2D–2D materials composed of perpendicularly oriented covalent organic frameworks (COFs) and graphene were prepared and tested for energy storage applications. Diboronic acid molecules covalently attached to graphene oxide (GO) were used as nucleation sites for directing vertical growth of COF‐1 nanosheets (v‐COF‐GO). The hybrid material has a forest of COF‐1 nanosheets with a thickness of 3 to 15 nm in edge‐on orientation relative to GO. The reaction performed without molecular pillars resulted in uncontrollable growth of thick COF‐1 platelets parallel to the surface of GO. The v‐COF‐GO was converted into a conductive carbon material preserving the nanostructure of precursor with ultrathin porous carbon nanosheets grafted to graphene in edge‐on orientation. It was demonstrated as a high‐performance electrode material for supercapacitors. The molecular pillar approach can be used for preparation of many other 2D‐2D materials with control of their relative orientation.