A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

Abstract

Zr‐based metal‐organic framework (Zr‐MOF) nanoparticles (NPs) have attracted extensive research thanks to their outstanding thermal and chemical stability, but their efficient synthesis is still challenging. Here, high‐quality Zr‐MOF NPs with tunable and uniform particle sizes can be successfully fabricated within 30 min by high‐gravity technology with high yields. Significantly, the rapidly milder preparation of UiO‐66 NPs can also be achieved at 90 or 70°C. This strategy has been extended to the synthesis of other Zr‐MOF NPs. Furthermore, the water vapor adsorption properties of obtained UiO‐66 NPs display a size‐dependent effect. The 70 nm UiO‐66 NPs have the highest adsorption capacity of 625 mg g−1 among unmodified UiO‐66 reported so far, and manifest 2.0–2.8 times faster water adsorption rate than the micron ones. This study provides a feasible method for the efficient and mild preparation of MOFs nanoparticles, which may promote the synthesis and applications of nano‐sized MOFs.

Upcycling plastic wastes into high-performance nano-MOFs by efficient neutral hydrolysis for water adsorption and photocatalysis

“…The working capacities of the obtained samples are relatively low at p / p 0 < 0.3, and then sharply increase as the relative pressure rises, which is related to the hydrophobicity of the organic linker. 37,38 Hysteresis loops appear in the desorption isotherms due to water cluster growth and pore filling during adsorption. 39 In particular, TP-MIL-101(Cr) shows 2–9 times higher absorption capacity (1327.3 mg g −1 ) than the other samples, revealing that the water absorption capacity is directly proportional to the BET surface area.…”

The controllable and efficient synthesis of two-dimensional metal–organic framework nanosheets for heterogeneous catalysis

“…22,23 Additionally, the technology provides a high-tech platform for the cost-effective preparation of MOFs. 3,24,25 According to the classical LaMer model, the reaction solutions in RPB achieve a high degree of supersaturation and a rapid nucleation process and termination of crystal growth, which can generate 2D MOF nanosheets with thinner dimensions. 3,26,27 Herein, we propose a controllable and efficient method for the preparation of 2D ZIF-L nanosheets with leaf-like crystal morphology using a high-gravity rotating packed bed toward high-performance heterogeneous catalysis.…”

“…22,23 Additionally, the technology provides a high-tech platform for the cost-effective preparation of MOFs. 3,24,25 According to the classical LaMer model, the reaction solutions in RPB achieve a high degree of supersaturation and a rapid nucleation process and termination of crystal growth, which can generate 2D MOF nanosheets with thinner dimensions. 3,26,27…”

Green, efficient and controllable synthesis of high-quality MOF-74 with high gravity technology

“…48 Recently, ultra-small MOFs and Zr-based MOF nanoparticles have been successfully synthesized in a RPB using organic solvents as the reaction media. 49,50 High gravity intensification technology is expected to solve the difficulty in controlling the particle size and the low synthesis efficiency of MOFs in the aqueous phase.…”