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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Chem. | doi: 10.3389/fchem.2019.00686

Observation of Ag nanoparticles in/on Ag@MIL-100(Fe) prepared through different procedures

  • 1Institute of Catalysis and Petrochemistry (ICP), Spain
  • 2Center for High-resolution Electron Microscopy, School of Physical Science and Technology, ShanghaiTech University, China

Loading of active metals, metal clusters and/or metal nanoparticles in Metal Organic Frameworks (MOFs) is an emergent field with applications in sensors, catalysis, medicine and even in the polymeric industry. In the present work, MIL-100(Fe) has been synthesized and reacted with AgNO3 through liquid and incipient wetness, and also through solid-state reaction or solid grinding. The aim of this study is to evaluate whether the MIL-100 would uptake metal particles using a similar principle as that of the ion exchange in zeolites, or else, their inherent humidity would favor the “dissolution” of the metal salt thus yielding very small metal particles. The immobilization of Ag nanoparticles inside the MOF pores was identified by Cs-corrected scanning transmission electron microscopy (Cs-corrected STEM) techniques.

Keywords: Ag@MIL-100(Fe) , MOF, Impregnation, STEM/HAADF, TEM

Received: 22 May 2019; Accepted: 04 Oct 2019.

Copyright: © 2019 Mahugo, Mayoral, Sánchez-Sánchez and Diaz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Isabel Diaz, Institute of Catalysis and Petrochemistry (ICP), Madrid, Madrid, Spain, idiaz@icp.csic.es