CO2 controls the oriented growth of metal-organic framework with highly accessible active sites

Abstract

The production of 2D metal-organic frameworks (MOFs) with highly exposed active surfaces is of great importance for catalysis. Here we demonstrate the formation of MOF nanosheets by utilizing CO 2 as a capping agent to control the oriented growth of MOF. This strategy has many advantages over the conventional methods. For example, it is template-free and proceeds at mild temperature (35°C), CO 2 can be easily removed by depressurization, and the properties of the MOF nanosheets can be well adjusted by changing CO 2 pressure. Such a simple, rapid, efficient and adjustable route produces MOF nanosheets with ultrathin thickness (∼10 nm), small lateral size (∼100 nm) and abundant unsaturated coordination metal sites on surfaces. Owing to these unique features, the as-synthesized MOF nanosheets exhibit superior activity for catalyzing the oxidation reactions of alcohols.

Cobalt(II)‐dianthracene Frameworks: Assembly, Exfoliation and Properties

“…Metal-organic nanosheets (MONs) or metal-organic layers (MOLs) have garnered tremendous attentions in recent years owing to their tailorable structures and modulable functions. [46,47] Significant progress has been witnessed regarding the exfoliation methodologies of MONs, [48][49][50] and their applications in different areas such as sieving, [51] sensing, [52][53][54] catalysis, [55] energy storage [56] and molecular spintronics. [57] But little attention was paid to the design and syntheses of responsive MONs so far.…”

Progress through synergistic effects of heterojunction in nanocatalysts ‐ Review

“…Metal-organic frameworks (MOFs) with high surface area and porous structure prepared by coordinating organic ligands to metal ions serve as intriguing hosts to support catalytic functionalities through assembled decoration. [58] Carbon nanotubes are also promising catalyst support materials for rational design of new catalytic membrane reactors. Most notably is that Marr et al [59] recently designed multiwalled carbon nanotubes microarray membranes decorated with Pt nanoparticle urchins for underwater vehicle propulsion via catalytic decomposition of H2O2 (figure 1).…”

Metal–Organic Layers Hierarchically Integrate Three Synergistic Active Sites for Tandem Catalysis

“…Metal‐organic layers (MOLs), a 2D monolayered version of 3D MOFs, [1–21] have recently provided a tunable material platform for the design of heterogeneous catalysts featuring isolated, uniform, and well‐defined active sites (Figure 1 a). [22–31] Hierarchical integration of multiple catalytic centers into MOLs can facilitate synergistic or tandem catalysis to potentially afford atom‐economic and step‐efficient synthetic methodologies [32, 33] . Although several MOLs with two different active centers have been constructed (Figure 1 b) [34–38] and some of them have shown enhanced catalytic performance over their homogenous counterparts, [37, 38] the design of MOLs containing three or more different catalytic centers remains a challenge [23, 39] …”