A Novel Mesoporous Aluminum‐Based MOF with Large Pore Volume for High Concentration Benzene Adsorption
Laigang Hu, Mengxue Zhang, Weiwei Wang, Jinru Hu, Wenhao Wu, Daohui Lin, Kun Yang
Abstract
Abstract Developing large pore volume mesoporous metal‐organic frameworks (MOFs) is a reliable strategy for adsorbing high‐concentration benzene in the event of accidental leakage. Herein, a novel mesoporous Al‐based MOF, named ZJU‐928(Al), is synthesized using biphenyl‐3,4′,5‐tricarboxylic acid ligands and low toxic AlO 6 cluster. It has larger pore volume (1.05 cm 3 g −1 ), order hexagonal channel (32.10 Å), and higher specific surface area (2344 m 2 g −1 ). As relative pressure up to 0.10, benzene adsorption of ZJU‐928(Al) rises to 9.99 mmol g −1 , exhibiting an excellent saturation benzene adsorption of 11.37 mmol g −1 at 298 K. The isosteric heat of adsorption for benzene on ZJU‐928(Al) is only 24.52 kJ mol −1 at near‐zero loading, lower than that of most reported MOFs, allowing for lower energy consumption during ZJU‐928(Al) regeneration. ZJU‐928(Al) has excellent cyclical benzene adsorption‐desorption performance, and highest benzene diffusivity coefficient (2.65 × 10 −5 cm 2 s −1 ). Simulation shows that the excellent saturation benzene adsorption performance of ZJU‐928(Al) can be attributed to the larger pore volume accommodating more benzene molecules. Consequently, this research synthesizes a novel mesoporous Al‐based MOF with excellent saturation benzene adsorption, highlighting the potential of MOFs for high‐concentration toxic gas adsorption.