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Advanced Functional Hierarchical Nanoporous Structures with Tunable Microporous Coatings Formed via an Interfacial

Qiaobei Dong1, Fanglei Zhou1, Ji Jiang1

  • 1Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.

ACS Applied Materials & Interfaces
|May 19, 2020
PubMed
Summary

This study presents a new liquid phase method to create tunable microporous coatings on nanoporous materials. This technique effectively entraps homogeneous catalysts, preventing leaching and enabling efficient catalyst separation and reuse.

Keywords:
Hierarchical structuresencapsulationhomogeneous catalystsinterfacial reactionmicroporous inorganic coatingnanoporous materials

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Hierarchical nanoporous structures with microporous coatings are crucial for applications like catalyst entrapment and selective catalysis.
  • Microporous inorganic coatings offer excellent stability in organic solvents, high temperatures, and pressures.

Purpose of the Study:

  • To develop a novel liquid phase interfacial reaction process for creating defect-free hybrid coatings on nanoporous materials.
  • To convert these hybrid coatings into tunable microporous coatings.
  • To demonstrate the entrapment of functional materials, specifically homogeneous catalysts.

Main Methods:

  • A liquid phase interfacial reaction process was employed to form hybrid coatings on nanoporous materials.
  • The hybrid coatings were subsequently converted into microporous coatings with controlled pore sizes.
  • Tetrakis(triphenylphosphine) palladium (Pd(PPh3)4) was synthesized in situ and encapsulated within the microporous shell.

Main Results:

  • A defect-free, hybrid coating was successfully formed and converted into a microporous coating with tunable pore size.
  • The encapsulated tetrakis(triphenylphosphine) palladium (Pd(PPh3)4) catalyst showed negligible palladium leaching.
  • This demonstrates an effective solution for catalyst separation challenges in homogeneous catalysis.

Conclusions:

  • The novel strategy provides an effective method for forming microporous inorganic coatings on nanoporous materials.
  • This approach is suitable for entrapping various functional materials for diverse applications.
  • The developed technique addresses the critical issue of catalyst leaching in homogeneous catalysis.