SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (4): 818-826.DOI: 10.1016/j.cjche.2018.06.016

• Separation Science and Engineering • 上一篇    下一篇

Hybridization of metal-organic framework and monodisperse spherical silica for chromatographic separation of xylene isomers

Bixuan Gao, Minhui Huang, Zhiguo Zhang, Qiwei Yang, Baogen Su, Yiwen Yang, Qilong Ren, Zongbi Bao   

  1. Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2018-05-07 修回日期:2018-05-30 出版日期:2019-04-28 发布日期:2019-06-14
  • 通讯作者: Yiwen Yang, Zongbi Bao
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21722609, 21776240), and Zhejiang Provincial Natural Science Foundation of China (LR17B060001).

Hybridization of metal-organic framework and monodisperse spherical silica for chromatographic separation of xylene isomers

Bixuan Gao, Minhui Huang, Zhiguo Zhang, Qiwei Yang, Baogen Su, Yiwen Yang, Qilong Ren, Zongbi Bao   

  1. Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2018-05-07 Revised:2018-05-30 Online:2019-04-28 Published:2019-06-14
  • Contact: Yiwen Yang, Zongbi Bao
  • Supported by:
    Supported by the National Natural Science Foundation of China (21722609, 21776240), and Zhejiang Provincial Natural Science Foundation of China (LR17B060001).

摘要: Metal-organic frameworks (MOFs) packed in the column have been a promising candidate as the stationary phase for high performance liquid chromatography (HPLC). However, the direct packing of irregular MOF powder could raise some problems like high back pressure and low column efficiency in the HPLC separation. In this work, UiO-66 capable of separating xylenes was supported effectively on the surface of the monodisperse spherical silica microspheres by one-pot method. The hybridization of UiO-66 and silica microspheres (termed UiO-66@SiO2 shell-core composite) was prepared by stirring the suspension of the precursors of UiO-66 and—COOH terminated silica in the N,N-dimethylformamide with heating. The shell-core composite material UiO66@SiO2 was characterized by SEM, TEM, PXRD and FTIR. Then, it was used as a packing material for the chromatographic separation of xylene isomers. Xylene isomers including o-xylene, m-xylene and p-xylene were efficiently separated on the column with high resolution and good reproducibility. Moreover, the UiO-66@SiO2 shell-core composites packed column still remained reverse shape selectivity as UiO-66 possessed, and the retention of xylenes was probably ascribed to the hydrophobic effect between analytes and the aromatic rings of the UiO-66 shell. The UiO-66@SiO2 shell-core composites obtained in this study have some potential for the separation of structural isomers in HPLC.

关键词: Adsorption, Chromatography, Separation, Hybridization, Metal-organic framework, Silica

Abstract: Metal-organic frameworks (MOFs) packed in the column have been a promising candidate as the stationary phase for high performance liquid chromatography (HPLC). However, the direct packing of irregular MOF powder could raise some problems like high back pressure and low column efficiency in the HPLC separation. In this work, UiO-66 capable of separating xylenes was supported effectively on the surface of the monodisperse spherical silica microspheres by one-pot method. The hybridization of UiO-66 and silica microspheres (termed UiO-66@SiO2 shell-core composite) was prepared by stirring the suspension of the precursors of UiO-66 and—COOH terminated silica in the N,N-dimethylformamide with heating. The shell-core composite material UiO66@SiO2 was characterized by SEM, TEM, PXRD and FTIR. Then, it was used as a packing material for the chromatographic separation of xylene isomers. Xylene isomers including o-xylene, m-xylene and p-xylene were efficiently separated on the column with high resolution and good reproducibility. Moreover, the UiO-66@SiO2 shell-core composites packed column still remained reverse shape selectivity as UiO-66 possessed, and the retention of xylenes was probably ascribed to the hydrophobic effect between analytes and the aromatic rings of the UiO-66 shell. The UiO-66@SiO2 shell-core composites obtained in this study have some potential for the separation of structural isomers in HPLC.

Key words: Adsorption, Chromatography, Separation, Hybridization, Metal-organic framework, Silica