Defect-induced synthesis of nanoscale hierarchically porous metal-organic frameworks with tunable porosity for enhanced volatile organic compound adsorption

Kuan Liang; Weibiao Guo; Linmei Li; Huidong Cai; Haiqi Zhang; Jingjing Li; Feng Xu; Jian Yan; Daofei Lv; Hongxia Xi; Chongxiong Duan

Nano Materials Science (Aug 2024)

Defect-induced synthesis of nanoscale hierarchically porous metal-organic frameworks with tunable porosity for enhanced volatile organic compound adsorption

Kuan Liang,
Weibiao Guo,
Linmei Li,
Huidong Cai,
Haiqi Zhang,
Jingjing Li,
Feng Xu,
Jian Yan,
Daofei Lv,
Hongxia Xi,
Chongxiong Duan

Affiliations

Kuan Liang: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China
Weibiao Guo: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China
Linmei Li: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China
Huidong Cai: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
Haiqi Zhang: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China
Jingjing Li: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China
Feng Xu: School of Environmental and Chemical Engineering, Foshan University, Foshan, 528231, China
Jian Yan: School of Environmental and Chemical Engineering, Foshan University, Foshan, 528231, China
Daofei Lv: School of Environmental and Chemical Engineering, Foshan University, Foshan, 528231, China
Hongxia Xi: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China; Corresponding author.
Chongxiong Duan: Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, Foshan University, Foshan, 528231, China; School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China; Corresponding author. School of Materials Science and Hydrogen Engineering, Foshan University, Foshan, 528231, China.

Journal volume & issue: Vol. 6, no. 4
pp. 467 – 474

Abstract

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Nanoscale hierarchically porous metal-organic frameworks (NH-MOFs) synergistically combine the advantages of nanoscale MOFs and hierarchically porous MOFs, resulting in remarkable characteristics such as increased specific surface area, greater porosity, and enhanced exposure of active sites. Herein, nanoscale hierarchically porous UIO-66 (UIO-66_X) was synthesized using a defect-induced strategy that employed ethylene diamine tetraacetic acid (EDTA) as a modulator. The introduced EDTA occupies the coordination sites of organic ligands, promoting the formation and growth of UIO-66 crystal nuclei and inducing defects during synthesis. The as-synthesized UIO-66_X crystals exhibit a uniform distribution with an average size of approximately 100 nm. In addition, the total pore volume attains a remarkable value of 0.95 cm3 g−1, with mesopores constituting 36.8 % of the structure. Furthermore, the porosities of UIO-66_X can be easily tuned by controlling the molar ratio of EDTA/Zr4+. In addition, the as-synthesized UIO-66_X exhibits excellent adsorption capacities for n-hexane (344 mg g−1) and p-xylene (218 mg g−1), which are 44.5 % and 27.5 % higher than those of conventional UIO-66, respectively. Finally, the adsorption behavior of n-hexane and p-xylene molecules in UIO-66_X was investigated using density functional theory simulations.

Published in Nano Materials Science

ISSN: 2589-9651 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.keaipublishing.com/en/journals/nano-materials-science/

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