Facile synthesis of magnesium-based metal-organic framework with tailored nanostructure for effective volatile organic compounds adsorption

• Published in: Royal Society open science 2022-03, Vol.9 (3), p.211544
• Main Authors: Hu, Zichu, Liu, Hui, Zuo, Ya, Ji, Yufei, Li, Shujing, Zhang, Wanqi, Liu, Zhechen, Chen, Zhangjing, Zhang, Xiaotao, Wang, Ximing
• Format: Article
• Language: English
• Subjects: adsorption; Chemistry; magnesium-based metal-organic framework; VOCs; wood drying
• ISSN: 2054-5703; 2054-5703
• DOI: 10.1098/rsos.211544

A novel Mg(II) metal-organic framework (Mg-MOF) was synthesized based on the ligand of 2,2'-bipyridine-4,4'-dicarboxylic acid. Single-crystal X-ray structural analysis confirmed that three-dimensional-nanostructure Mg-MOFs formed a monoclinic system with a channel size of 15.733 Å × 23.736 Å. N adsorption isotherm, Fourier transform infrared spectroscopy, thermogravimetric analysis and high-resolution transmission electron microscopy were performed to characterize the thermal stability and purity of the Mg-MOFs. The adsorption studies on four typical volatile organic compounds (VOCs) emitted during wood drying showed that Mg-MOFs have noteworthy adsorption capacities, especially for benzene and β-pinene with adsorptions of 182.26 mg g and 144.42 mg g , respectively. In addition, the adsorption of Mg-MOFs mainly occurred via natural adsorption, specifically, multi-layer physical adsorption, accompanied by chemical forces, which occurred in the pores where the VOCs molecules combined with active sites. As an adsorbent, Mg-MOFs exhibit versatile behaviour for toxic gas accumulation.