Synthesis of hierarchical-pore metal-organic framework on liter scale for large organic pollutants capture in wastewater

Yuxi Zhang; Qunqun Ruan; Yaguang Peng; Guopeng Han; Hongliang Huang; Chongli Zhong

doi:10.1016/j.jcis.2018.04.063

Synthesis of hierarchical-pore metal-organic framework on liter scale for large organic pollutants capture in wastewater

J Colloid Interface Sci. 2018 Sep 1:525:39-47. doi: 10.1016/j.jcis.2018.04.063. Epub 2018 Apr 17.

Authors

Yuxi Zhang¹, Qunqun Ruan¹, Yaguang Peng¹, Guopeng Han¹, Hongliang Huang², Chongli Zhong³

Affiliations

¹ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
² State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China. Electronic address: huanghl@mail.buct.edu.cn.
³ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China; Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing 100029, China.

PMID: 29684729
DOI: 10.1016/j.jcis.2018.04.063

Abstract

Large organic pollutants in wastewater are harmful to human health and environmental ecosystem, and it is of great importance to remove them from waste water. In this report, hierarchical-pore metal-organic frameworks with different mesopore sizes (H-UiO-66-3.8 nm and H-UiO-66-17.3 nm) have been successfully synthesized at reflux condition. The resulting MOFs are characterized by N₂ adsorption-desorption analysis and the results show that the samples have hierarchical-pore structures, which indicate the heat reflux method is efficient for the synthesis of H-UiO-66s on liter scale. In order to test the performance of H-UiO-66s for large organic pollutants capture, tetracycline (TC) was taken as an example to perform adsorption experiments. Remarkably, two kinds of H-UiO-66s exhibit significant improvement of adsorptive capacities compared with microporous UiO-66. The adsorption quantity of TC in H-UiO-66-17.3 nm is 666.67 mg·g^-1, which is 430% higher than the value in original microporous UiO-66. In addition, the capture ability of H-UiO-66-17.3 nm surpasses various reported adsorbent materials, such as nanocomposite, activated carbon and NH₂-MIL-101(Cr). Meanwhile, the H-UiO-66-3.8 nm and H-UiO-66-17.3 nm also show high adsorption capacities for Rhodamine B (RhB) and tannic acid (TA), indicating H-UiO-66s have wide potential application for capture various large organic pollutants. These results show that H-UiO-66s can be successfully synthesized on liter scale under reflux condition and these materials perform excellent adsorption capacities for various organic pollutants, leading the potential application in wastewater treatment.

Keywords: Adsorption; Hierarchical-pore; Metal-organic framework; Organic pollutants; Wastewater treatment.