Metal‐Organic Frameworks/Graphene‐Based Materials: Preparations and Applications

Abstract

Metal-organic frameworks (MOFs), a new class of crystalline porous materials, can be applied in many fields as adsorbents, supercapacitors, catalysts, and so on because of, among others, their superior properties of large surface area, tunable pore size, diverse structures. However, the low stability and selectivity of traditional MOFs indicate that they are not the best configuration for the applications outlined above. In this case, a type of composite made from an assembly of graphene-based materials and MOFs that exhibits the advantages of the parent materials has attracted widespread attention in recent years. This review provides an overview of the recent developments of MOF/graphene-based materials, focusing on their applications in gas separation/storage, water purification, chemical sensors, batteries, supercapacitors, and catalysts, as well as their preparation methods.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201804950. traditional method, they can be excellent alternatives of single MOFs to overcome the above-mentioned difficulties. [34][35][36][37][38] Graphene-based materials have recently introduced new possible applications because of their unique structure and low toxicity, as well as their excellent electronic, thermal, electrochemical, and mechanical properties. [39] More recently, many reports have confirmed that the introduction of graphene-based materials into other materials can lead to surprising improvements in electronic conductivity and stability. [38,40] Under these circumstances, it is reasonable to consider whether composites made from the assembly of graphene-based materials and MOFs possess extraordinary characteristics given that the parent materials have complementary properties. [40][41][42] Naturally, the idea of hybridizing graphene derivatives with MOFs materialized and soon attracted widespread attention. [43][44][45] According to recent research, composites of MOF/graphene-based materials can integrate the advantages and mitigate the shortcomings of the individual components perfectly, enabling the composites to possess improved stability, enhanced electrical conductivity, high selectivity, and template effects. [34,[46][47][48][49] With the combination of MOF and graphene-based materials, the unexpected interactions take place and bring unique performance in many applications. Thanks to the ionic groups and the aromatic sp 2 domains, graphene-based materials can not only function as structural nodes, but also participate in bonding interactions, which would be more active in MOFs. What's more, carboxylate and pyridine groups of graphene-based materials play important part in the assemble, which could enhance the coordination bonding and guide the growth of MOF, providing a more beneficial structure. These special interactions are unique in MOF/graphenebased materials, which indicates that this kind of materials deserve more attention. As concluded in Scheme 1, the addition of graphene-based material...

Beetle‐Inspired Assembly of Heterostructured Lamellar Membranes with Polymer Cluster–Patterned Surface for Enhanced Molecular Permeation

“…Here, GO and RGO were synthesized through traditional methods for comparison with the results in literature . Transmission electron microscopy (TEM, Figure a) and atomic force microscopy (AFM, Figure c; Figure S1, Supporting Information) images show that GO possesses typical flexible sheet structure with irregular wrinkles.…”

“…Synthesis of Nanosheets : GO nanosheets were fabricated from natural graphite powders based on modified Hummers' method in literature . RGO was reduced from GO through Wallace's method: GO powder was dispersed in water to prepare a 0.5 g L −1 homogeneous dispersion via ultrasonic.…”

Stable Dispersed Zeolitic Imidazolate Framework/Graphene Oxide Nanocomposites in Ionic Liquids Resulting in High Lubricating Performance

“…[ 35 ] The incorporation of GO with MOFs is supposed to change the dispersion stability in great extent and combine the advantages of both parent materials. [ 36 ] The surface of GO is decorated with oxygen‐rich functional group such as epoxy, hydroxyl, and carboxylic group, which might provide the active site to anchor MOFs. [ 37 ] The excellent mechanical strength and easy shear capability enable GO with impressive tribological behavior.…”

Cellulose stabilized Fe3O4and carboxylate‐imidazole and Co‐based MOF growth as an exceptional catalyst for the Knoevenagel reaction

“…[22][23][24] These exciting properties of MOFs have led to their applications in various fields including gas storage, separation, ion exchange, chemical sensors, supercapacitors, medicinal and catalysis. [25][26][27][28][29][30][31] Nevertheless, the application of these materials has been restricted because of their chemical instability to aqueous and organic media, and strongly acidic or alkaline environment and difficult recovery. [32] Recently, MOF-based composites have been fabricated through hybridizing MOFs with other materials, such as metal nanoparticles, [33] polymers, [34,35] other MOFs [36] and COFs, [37] which display new properties that are superior to those of the individual components by the combination of features of two ingredients.…”