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Simultaneously Detection and Removal of Organophosphorus Pesticide by A novel Zr-MOF based Smart Adsorbent

Abstract

Developing a smart adsorbent that can efficiently detect and remove toxic organophosphorus pesticides is important but still a great challenge. Here, a novel MOF-based smart adsorbent of Fe3O4@SiO2@UiO-67 was successfully fabricated via a versatile layer by layer assembly strategy and applied for simultaneously selective recognition, detection and removal of glyphosate. The prepared smart adsorbent contains Zr-OH groups with high affinity to phosphate groups, endowing it with selective recognition and higher adsorption capacity for glyphosate. Moreover, combining with glyphosate leads to the changes of the fluorescence intensity of the smart adsorbent, and incorporating of silica impedes the electron transfer between the UiO-67 and magnetic core, which can identify the adsorbate and its concentration, and achieve lower detection limit. Furthermore, Fe3O4 as magnetic core of the smart adsorbent facilitates the separation and removal process by external magnetic field. Under optimized conditions, the obtained smart adsorbent exhibits excellent detection and adsorption performance with high adsorption capacity (256.54 mg g-1), good reusability, and low detection limit (0.093 mg L-1) for glyphosate, implying the smart adsorbent have integrated the advantages of individual components. All of these indicate MOF-based smart adsorbents are promising for synchronous adsorption/detection and removal of OPPs, proposing a viable option for monitoring water quality and treating wastewater.

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Publication details

The article was received on 22 Sep 2017, accepted on 02 Jan 2018 and first published on 02 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA08399H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Simultaneously Detection and Removal of Organophosphorus Pesticide by A novel Zr-MOF based Smart Adsorbent

    Q. Yang, J. Wang, X. Chen, W. Yang, H. Pei, N. Hu, Z. Li, Y. Suo, T. Li and J. Wang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C7TA08399H

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