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  • Title: Synthesis of hierarchical-pore metal-organic framework on liter scale for large organic pollutants capture in wastewater.
    Author: Zhang Y, Ruan Q, Peng Y, Han G, Huang H, Zhong C.
    Journal: J Colloid Interface Sci; 2018 Sep 01; 525():39-47. PubMed ID: 29684729.
    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.
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