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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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Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
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A highly ordered cubic mesoporous silica/graphene nanocomposite.

Chang-Wook Lee1, Kwang Chul Roh, Kwang-Bum Kim

  • 1Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea. kbkim@yonsei.ac.kr.

Nanoscale
|September 24, 2013
PubMed
Summary

A novel method synthesized ordered mesoporous silica (KIT-6)/graphene nanocomposites. The P123 copolymer acted as a structure-directing and cross-linking agent, enabling templating for future mesoporous materials.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Ordered mesoporous silica materials, such as KIT-6, offer high surface area and tunable pore structures.
  • Graphene is a 2D nanomaterial with exceptional electrical and mechanical properties.
  • Combining these materials can lead to novel nanocomposites with synergistic properties.

Purpose of the Study:

  • To develop a novel synthesis methodology for creating highly ordered cubic mesoporous silica (KIT-6)/graphene nanocomposites.
  • To investigate the dual role of the non-ionic triblock copolymer P123 in the synthesis process.
  • To explore the potential of the synthesized nanocomposite as a template for other mesoporous material/graphene composites.

Main Methods:

  • Synthesis of KIT-6 mesoporous silica using a structure-directing agent (P123).
  • Incorporation of graphene into the mesoporous silica framework.
  • Characterization of the resulting KIT-6/graphene nanocomposite and 2D KIT-6 nanoflakes.

Main Results:

  • Successful synthesis of a highly ordered cubic mesoporous silica (KIT-6)/graphene nanocomposite.
  • Demonstration of P123 acting as both a structure-directing agent for KIT-6 and a cross-linking agent for graphene.
  • Formation of 2D KIT-6 nanoflakes.
  • The KIT-6/graphene nanocomposite showed potential as a template for fabricating other mesoporous material/graphene composites.

Conclusions:

  • A novel and effective synthesis route for KIT-6/graphene nanocomposites was established.
  • The triblock copolymer P123 is crucial for achieving the desired structure and cross-linking in the nanocomposite.
  • The synthesized nanocomposite serves as a promising platform for developing advanced mesoporous materials integrated with graphene.