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We synthesized fibrous zeolitic TON particles, demonstrating high anisotropy for stable Pickering emulsions in basic conditions. These particles, functionalized with palladium nanoparticles, act as efficient Pickering interfacial catalysts for Suzuki-Miyaura coupling reactions.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Zeolites offer tunable properties for Pickering emulsification.
  • Previous work focused on layered zeolites, limiting applications.
  • Anisotropic particle morphology is key for enhanced emulsification.

Purpose of the Study:

  • Synthesize and characterize a new anisotropic zeolite form (fibrous TON).
  • Evaluate its amphiphilicity and Pickering emulsification capabilities, especially in basic media.
  • Develop a Pickering interfacial catalyst (PIC) for Suzuki-Miyaura coupling.

Main Methods:

  • Synthesis of fibrous zeolitic TON with high crystallinity and dispersion.
  • Definition and measurement of an anisotropic index.
  • Preparation of palladium nanoparticle-decorated TON (Pd/TON).
  • Testing Pd/TON as a Pickering interfacial catalyst in biphasic Suzuki-Miyaura coupling.

Main Results:

  • Successfully synthesized fibrous zeolitic TON with high anisotropy (index=17.7).
  • Achieved stable Pickering emulsions in basic environments, unlike previous systems.
  • Pd/TON demonstrated excellent catalytic activity (100% yield in 20 min) and easy product recovery.
  • Identified zeta potential as crucial for catalytic activity across different cation types.

Conclusions:

  • Fibrous zeolitic TON is a novel anisotropic material for stable Pickering emulsions in basic conditions.
  • Pd/TON functions as a highly efficient and recyclable Pickering interfacial catalyst.
  • This approach offers a green and effective method for Suzuki-Miyaura coupling.