Large‐Scale Synthesis of MOF‐Derived Superporous Carbon Aerogels with Extraordinary Adsorption Capacity for Organic Solvents

Wang, Chaohai; Kim, Jeonghun; Tang, Jing; Na, Jongbeom; Kang, Yong‐Mook; Kim, Minjun; Lim, Hyunsoo; Bandô, Yoshio; Li, J.; Yamauchi, Yusuke

doi:10.1002/ange.201913719

Cited by 86 publications

(49 citation statements)

References 40 publications

(14 reference statements)

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“…In addition, the density of 7.0 ± 0.5 mg cm −3 is lower than that of pure graphene aerogel and graphene-based composites such as G-ZIF8, g-C 3 N 4 -G, MXene/G, and BN nanotubes/rGO (Fig. 2h) [20][21][22][23]31,[34][35][36][37] .…”

Section: Resultsmentioning

confidence: 90%

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Ultralight covalent organic framework/graphene aerogels with hierarchical porosity

et al. 2020

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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.

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Section: Resultsmentioning

confidence: 90%

“…3c, Supplementary Table 2 and Supplementary Fig. 22b) 20,[32][33][34][35][36][37][38][39] . The recyclability of COF/rGO aerogel was measured by repeated ethanol absorption and then drying in the oven.…”

Section: Resultsmentioning

confidence: 99%

Ultralight covalent organic framework/graphene aerogels with hierarchical porosity

et al. 2020

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“…In addition, the density of 7.0 ± 0.5 mg cm -3 is lower than that of pure graphene aerogel and graphenebased composites such as G-ZIF8, g-C 3 N 4 -G, MXene/G and BN nanotubes/rGO ( Fig. 2h) [18][19][20][21]29,[32][33][34][35] .…”

Section: Resultsmentioning

confidence: 91%

“…3c, Supplementary Table 2 and Supplementary Fig. 19b) 18,[30][31][32][33][34][35][36][37] . Moreover, the recyclability of COF/rGO aerogel was measured by repeated ethanol absorption and then drying in the oven.…”

Section: Resultsmentioning

confidence: 99%

Ultralight Covalent Organic Framework/graphene Aerogels with Hierarchical Porosity

Li¹,

Jin²,

Li³

et al. 2020

Preprint

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The fabrication of macroscopic architectures of covalent organic frameworks (COFs) instead of powders is of great significance to fully exploit their chemical functionality and porosity and to enable sufficient diffusion and mass transfer through the material. However, it is still a challenge to achieve the assembly of such 3D hierarchical porous architectures from COFs. Herein, COF/reduced graphene oxide (<a>rGO</a>) aerogels are presented, which are synthesized by a hydrothermal approach. The COFs grow in situ along the surface of the 2D graphene sheets, which are stacked in a 3D fashion, forming an aerogel after freeze-drying, which can be compressed and expanded several times without breaking. Thus, a facile, green and pyrolysis-free synthetic method for ultralight functional materials has been achieved. The COF/rGO aerogel shows 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 superior cycling stability over 5000 cycles, which is among the best results reported for COF-based supercapacitors so far. This work demonstrates a great advance for green synthesis of ultralight materials for environmental and energy applications.

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“…The polymeric materials 15 − 17 and metal–organic frameworks 18 − 20 have been employed as precursors of those heteroatom-doped carbons in terms of the carbon and doping heteroatom sources. Among various polymeric precursors, polydopamine (PDA), which is automatically polymerized from dopamine by atmospheric oxidation, is one of the most promising materials because thin films of PDA spontaneously formed at the solid–liquid, 21 − 23 the oil–water, and the air–water interfaces.…”

Section: Introductionmentioning

confidence: 99%

S/N Co-Doped Hollow Carbon Particles for Oxygen Reduction Electrocatalysts Prepared by Spontaneous Polymerization at Oil–Water Interfaces

et al. 2020

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We herein report that sulfur and nitrogen co-doped hollow spherical carbon particles can be applied to oxygen reduction reaction (ORR) electrocatalysts prepared by calcination of polydopamine (PDA) hollow particles. The hollow structure of PDA was formed by auto-oxidative interfacial polymerization of dopamine at the oil and water interface of emulsion microdroplets. The PDA was used as the nitrogen source as well as a platform for sulfur-doping. The obtained sulfur and nitrogen co-doped hollow particles showed a higher catalytic activity than that of nonsulfur-doped particles and nonhollow particles. The high ORR activity of the calcined S-doped PDA hollow particles could be attributed to the combination of nitrogen and sulfur active sites and the large surface areas owing to a hollow spherical structure.

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Large‐Scale Synthesis of MOF‐Derived Superporous Carbon Aerogels with Extraordinary Adsorption Capacity for Organic Solvents

Cited by 86 publications

References 40 publications

Ultralight covalent organic framework/graphene aerogels with hierarchical porosity

Ultralight covalent organic framework/graphene aerogels with hierarchical porosity

Ultralight Covalent Organic Framework/graphene Aerogels with Hierarchical Porosity

S/N Co-Doped Hollow Carbon Particles for Oxygen Reduction Electrocatalysts Prepared by Spontaneous Polymerization at Oil–Water Interfaces

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