Near‐Linear Controllable Synthesis of Mesoporosity in Hierarchical UiO‐66 by Template‐Free Nucleation‐Competition

Abstract

Hierarchies design of porosity in metal-organic frameworks (MOFs) has gained significant interest in recent years, and customization of mesoporous sizes in MOFs is still quite challenging. Herein, a template-free method by nucleation-competition has been developed to realize a near-linear control of the mesopore sizes (3-13 nm) in the hierarchical MOF UiO-66(Hf ). High selectivity of enzyme adsorption, high activity of bulky-molecular catalysis, high stability of mesostructure, and extension to other MOFs further prove the success in the potential customization synthesis and applications.

Hierarchically porous single catalyst Ru/HPW/UiO-66 with synergistic acid/metal sites for one-pot catalytic synthesis of γ-valerolactone

“…42 In a contrast, we have found that the introduction of water can induce the formation of uniform interparticle mesopores in our previous work. 43 During the solvothermal synthesis of UiO-66, water can accelerate the crystal nucleation via fast hydrolysis of the metal salts and dicarboxylic acid ligands, resulting in the formation of hierarchically micro-/mesoporous UiO-66 NPs. To integrate the acidic site and metal site into HP-UiO-66 (Scheme 1), the phosphotungstic acid Ru salt (Ru 3+ –HPW) was first synthesized via ion exchange of H 3 PW 12 O 40 with RuCl 3 .…”

Hierarchical Porous MIL-101(Cr) Solid Acid-Catalyzed Production of Value-Added Acetals from Biomass-Derived Furfural

“…As listed in Table 1, both CTAB and ClSO 3 H functionalization affected the pore size of the MOFs materials, and the pore size of these porous MOFs increased from 1.71 and 1.38 nm to 3.25 and 7.32 nm after CTAB treatment, respectively. This phenomenon was due to the accumulation of nanomaterials obtained [36,37]. After sulfonic acid functionalization, the acid content of MAS and MCS reached 0.36 and 0.65 mmol (H + )/g, respectively.…”

Constructing strategies for hierarchically porous MOFs with different pore sizes and applications in adsorption and catalysis

“…5a. 80 As the amount of H 2 O increases, the crystal size decreases, and thus, the mesopore size decreases. These experiments show that mesopores are beneficial to the adsorption and catalysis of macromolecules.…”