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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

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Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
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Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies

Published on: November 5, 2015

A versatile, ultralight, nitrogen-doped graphene framework.

Yang Zhao1, Chuangang Hu, Yue Hu

  • 1Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology, China.

Angewandte Chemie (International Ed. in English)
|October 13, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed an ultralight, nitrogen-doped, 3D graphene framework with record-low density. This advanced material shows superior oil adsorption and potential in supercapacitors and metal-free catalysis.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Graphene-based materials offer unique properties for various applications.
  • Developing ultralight, high-performance carbon architectures remains a challenge.

Purpose of the Study:

  • To synthesize an ultralight, nitrogen-doped, 3D graphene framework with exceptional properties.
  • To evaluate its potential as an adsorbent, supercapacitor electrode, and catalyst.

Main Methods:

  • Preparation of a nitrogen-doped, 3D graphene framework.
  • Characterization of its density, adsorption capacity, and electrochemical performance.

Main Results:

  • Achieved the lowest reported density for a graphene framework: (2.1 ± 0.3) mg cm(-3).
  • Demonstrated significantly higher adsorption capacity for oils and organic solvents compared to existing sorbents.
  • Exhibited promising performance as a supercapacitor electrode (484 F g(-1)) and a metal-free catalyst for oxygen reduction.

Conclusions:

  • The developed graphene framework, 'Graphene lite,' represents a breakthrough in ultralight material design.
  • Its superior adsorption and electrochemical properties highlight its versatility for environmental and energy applications.