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Microscopically tuning the graphene oxide framework for membrane separations: a review.

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Graphene oxide (GO) membranes offer stable and energy-efficient separations. Recent advances focus on tuning the GO framework with various materials to enhance performance in gas, water, and solvent purification.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Membrane-based separations are crucial for purifying gas, water, and organic solvents, offering energy savings and reduced pollution.
  • Graphene oxide (GO) membranes are gaining attention for their self-assembly properties and stability in separation applications.

Purpose of the Study:

  • To review recent advancements (last 3 years) in microscopically tuning the graphene oxide framework for enhanced membrane performance.
  • To summarize techniques for modifying GO membranes and their impact on separation efficiency and stability.

Main Methods:

  • Review of recent publications focusing on intercalation of GO nanosheets with organic molecules, polymers, inorganic particles, ions, and 2D materials.
  • Analysis of strategies including designing horizontal GO membranes and functionalizing GO nanosheets.

Main Results:

  • Tuning the GO framework with diverse materials leads to varied interlayer spacing and packing structures.
  • These modifications result in GO composite membranes with improved stability and separation performance.
  • Horizontal GO membrane design and GO nanosheet functionalization further enhance membrane properties.

Conclusions:

  • Microscopic tuning of the GO framework is a key strategy for developing advanced separation membranes.
  • Engineered GO membranes show significant potential for efficient and stable purification processes.
  • This review highlights methods to optimize GO membrane performance for various applications.