Hu Zichu, Liu Hui, Zuo Ya, Ji Yufei, Li Shujing, Zhang Wanqi, Liu Zhechen, Chen Zhangjing, Zhang Xiaotao, Wang Ximing
College of Science, Inner Mongolia Agriculture University, Hohhot 010018, People's Republic of China.
College of Material Science and Art Design, Inner Mongolia Agriculture University, Hohhot 010018, People's Republic of China.
R Soc Open Sci. 2022 Mar 30;9(3):211544. doi: 10.1098/rsos.211544. eCollection 2022 Mar.
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.
基于2,2'-联吡啶-4,4'-二羧酸配体合成了一种新型镁基金属有机框架材料（Mg-MOF）。单晶X射线结构分析证实，三维纳米结构的Mg-MOF形成单斜晶系，通道尺寸为15.733 Å × 23.736 Å。进行了N吸附等温线、傅里叶变换红外光谱、热重分析和高分辨率透射电子显微镜表征Mg-MOF的热稳定性和纯度。对木材干燥过程中排放的四种典型挥发性有机化合物（VOCs）的吸附研究表明，Mg-MOF具有显著的吸附能力，尤其是对苯和β-蒎烯的吸附量分别为182.26 mg/g和144.42 mg/g。此外，Mg-MOF的吸附主要通过自然吸附发生，具体而言，是多层物理吸附，并伴有化学作用力，这种作用发生在VOCs分子与活性位点结合的孔隙中。作为吸附剂，Mg-MOF对有毒气体积累表现出多种吸附行为。
