Nanoreactor Based on Macroporous Single Crystals of Metal-Organic Framework

Abstract

A sacrificial template strategy is developed for the synthesis of yolk-shell Au@ZIF-8 nanoreactor. The Au@ZIF-8 nanoreactor possesses single-crystalline metal-organic framework (MOF) shell with intrinsic monodisperse micropores and introduced macropores. In each of the macropores, one Au NP is encapsulated to form a nanoreactor unit. The quantity of the reactor units in the MOF shell can be readily regulated. Such structure features of the Au@ZIF-8 nanoreactor facilitate the size selectivity of reactants, the accessibility of Au nanoparticles to reactants, and the mass transfer of reactants and products. As a result, the Au@ZIF-8 nanoreactor delivers excellent size selectivity, enhanced conversion, and good cycling stability when used to catalyze the aerobic oxidation of alcohols with different molecular size.

Facile Synthesis of Magnetic Hierarchical Core–Shell Structured Fe3O4@PDA‐Pd@MOF Nanocomposites: Highly Integrated Multifunctional Catalysts

“…[9] Ye et al synthesizedh ierarchical core-shell structured Fe 3 O 4 @C-Pd@mCeO 2 nanosphere, and used it for the Suzukir eactiona nd the reduction of 4-NP. [11][12][13] Metal-organic frameworks (MOFs), emerging as an attractive class of crystalline porous materials with well-assembled active functionalities from metallici ons and organic linkers, would break the above-mentioned limitation of inorganic porous shells owing to their distinguished properties such as facile preparation, diversifiedc omponents and tailorable porosity. [11][12][13] Metal-organic frameworks (MOFs), emerging as an attractive class of crystalline porous materials with well-assembled active functionalities from metallici ons and organic linkers, would break the above-mentioned limitation of inorganic porous shells owing to their distinguished properties such as facile preparation, diversifiedc omponents and tailorable porosity.…”

Integration of Metal Nanoparticles into Metal–Organic Frameworks for Composite Catalysts: Design and Synthetic Strategy

“…Su and coworkers synthesized Au@ZIF‐8 nanoreactor with a yolk–shell structure by the sacrificial template method . As shown in Figure , the coated Au NPs, Au@silica core–shell components, were first synthesized, which were further encapsulated into ZIF‐8 support, and the Au@ZIF‐8 composite was finally obtained after etching the silica layer.…”

“…Synthesis of Au@ZIF‐8 by sacrificial template strategy. Reproduced with permission . Copyright 2016, John Wiley and Sons.…”

Recent Advances of MOFs and MOF‐Derived Materials in Thermally Driven Organic Transformations

“…Compared to supported NPs that are often found on the internal and external MOF surface, completely encapsulating the NPs can offer enhanced activity/selectivity in catalytic reactions ,. For these so‐called core–shell structures, the nanoparticles are typically made before the subsequent MOF synthesis .…”

“…This can ensure that the proper sequence in the desired cascade reaction is achieved . Last, the MOF can also selectively adsorb substrates/intermediates, limiting the access of other species to the NP surface, and hence also inhibit side reactions ,. As an example, in 2014, Tang et al.…”