Enhancement of photocatalytic aerobic oxidation of benzyl alcohol with the incorporation of cobalt in Zn-based MOF via post-synthetic metal exchange. (15th January 2022)

• Record Type: Journal Article
• Authors: Hosseini, Seyed Mohammad; Dehghan, Hossein; Safarifard, Vahid
• Is Part Of: Polyhedron. Volume 212(2022)
• Publication Date: 2022-01-15
• Subjects: Oxidation of alcohol -- Metal-organic framework -- Photocatalysts -- Post-synthetic modification; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2021.115581
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Modified metal-organic framework TMU-22(Zn/Co), was employed for the aerobic oxidation of benzyl alcohol. The TMU-22(Zn/Co) exhibited remarkable photocatalytic activity under visible light irradiation; the oxidation yield reached almost 65% for benzyl alcohol after 3 h reaction. The results demonstrated that the prepared photocatalyst is recyclable. Highlights: The TMU-22(Zn/Co) was used as photocatalyst for oxidation of alcohols. The TMU-22(Zn/Co) composite improves the photon-generated carrier transfer. The TMU-22(Zn/Co) inhibits the electron-hole recombination rate. The TMU-22(Zn/Co) shows good photocatalytic performance in terms of reusability. Abstract: In this work to introduce Co(II) ions into TMU-22(Zn) metal–organic framework (MOF), we report a postsynthetic exchange (PSE) approach. Several analytical methods were employed to examine the exchange between Co 2+ ions and Zn 2+ ions in TMU-22(Zn) for the formation of the mixed-metal TMU-22(Zn/Co). It was found that the introduction of active Co 2+ ions into the TMU-22(Zn) framework leads to the photocatalytic activity of TMU-22(Zn/Co) for benzyl alcohol oxidation. Since Co 2+ ions were favorably substituted at positions more accessible to the substrate, the TMU-22(Zn/Co) showed superior catalytic performance. This study provides a facile method to develop mixed-metal MOFs for photocatalysis performance.