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Enhancement of visible-light-driven CO2 reduction performance using amine-functionalized zirconium metal-organic framework

Abstract

By employing a conjugated amine-functionalized dicarboxylic ligand (H2L = 2,2'-diamino-4,4'-stilbenedicarboxylic acid, H2SDCA-NH2), we have successfully synthesized and characterized a porous and visible light responsive zirconium metal-organic framework ([Zr6O4(OH)4(L)6]•8DMF, denoted as Zr-SDCA-NH2). This Zr-MOF showed good chemical stability and broad visible light absorption with an absorption edge at about 600 nm. Served as photocatalyst, Zr-SDCA-NH2 exhibits visible-light activity for CO2 reduction with a formate formation rate of 96.2 μmol•h-1•mmolMOF-1, which is higher than the series of reported amine-functionalized Zr-MOFs. Mott-Schottky measurements, photoluminescence study and photocatalytic experiments demonstrated that Zr6 oxo cluster through LMCT process and organic ligand both contributed to the CO2 photoreduction. This study indicates that the combination of amino groups and highly conjugated molecules is a feasible and simple strategy to extend light abosrption of organic ligand, which is beneficial for designing visible light responsive MOF photocatalyst.

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Publication details

The article was received on 28 Oct 2017, accepted on 05 Dec 2017 and first published on 06 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT04062H
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Enhancement of visible-light-driven CO2 reduction performance using amine-functionalized zirconium metal-organic framework

    M. Sun, S. Yan, Y. Sun, X. Yang, Z. Guo, J. Du, D. Chen, P. Chen and H. Xing, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT04062H

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