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Main Title: Ultralight covalent organic framework/graphene aerogels with hierarchical porosity
Author(s): Li, Changxia
Yang, Jin
Pachfule, Pradip
Li, Shuang
Ye, Meng-Yang
Schmidt, Johannes
Thomas, Arne
Type: Article
Abstract: The fabrication of macroscopic objects from covalent organic frameworks (COFs) is challenging but of great significance to fully exploit their chemical functionality and porosity. Herein, COF/reduced graphene oxide (rGO) aerogels synthesized by a hydrothermal approach are presented. The COFs grow in situ along the surface of the 2D graphene sheets, which are stacked in a 3D fashion, forming an ultralight aerogel with a hierarchical porous structure after freeze-drying, which can be compressed and expanded several times without breaking. The COF/rGO aerogels show excellent absorption capacity (uptake of >200 g organic solvent/g aerogel), which can be used for removal of various organic liquids from water. Moreover, as active material of supercapacitor devices, the aerogel delivers a high capacitance of 269 F g −1 at 0.5 A g −1 and cycling stability over 5000 cycles. Macroscopic architectures of covalent organic frameworks (COF) allow to fully exploit their chemical functionality and porosity but achieving three-dimensional hierarchical porous COF architectures remains challenging. Here, the authors present a COF/reduced graphene oxide aerogel which is synthesized by growing COF during a hydrothermal process along the surface of graphene sheets.
Subject(s): mechanical and structural properties and devices
framework/graphene aerogels
Issue Date: 18-Sep-2020
Date Available: 4-Mar-2021
Language Code: en
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Sponsor/Funder: TU Berlin, Open-Access-Mittel – 2020
DFG, 390540038, EXC 2008: Unifying Systems in Catalysis "UniSysCat"
Journal Title: Nature Communications
Publisher: SpringerNature
Volume: 11
Issue: 1
Article Number: 4712
Publisher DOI: 10.1038/s41467-020-18427-3
EISSN: 2041-1723
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Chemie » FG Funktionsmaterialien
Appears in Collections:Technische Universität Berlin » Publications

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