期刊
DALTON TRANSACTIONS
卷 47, 期 3, 页码 909-915出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt04062h
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资金
- National Natural Science Foundation of China [21473024]
- Fundamental Research Funds for the Central Universities [2572017BB20]
- Science and Technology Research Project of Jilin Province [JJKH20170906KJ]
- Open project funds for Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education
By employing a conjugated amine-functionalized dicarboxylic ligand (H2L = 2,2'-diamino-4,4'-stilbenedicarboxylic acid, H(2)SDCA-NH2), we have successfully synthesized and characterized a porous and visible light responsive zirconium metal-organic framework ([Zr6O4(OH)(4)(L)(6)] center dot 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. When used as a photocatalyst, Zr-SDCA-NH2 exhibits visible-light activity for CO2 reduction with a formate formation rate of 96.2 mu mol h(-1) mmol(MOF)(-1), which is higher than the series of reported amine-functionalized Zr-MOFs. Mott-Schottky measurements, photoluminescence study and photocatalytic experiments demonstrated that the Zr-6 oxo cluster through the LMCT process and the 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 absorption of the organic ligand, which is beneficial for designing a visible light responsive MOF photocatalyst.
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