期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 19, 期 4, 页码 -出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ob01686a
关键词
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资金
- Fundacion Ramon Areces
- Ministerio de Ciencia, Innovacion y Universidades [RTI 2018-099482-A-I00]
- Generalitat Valenciana grupos de investigacion consolidables 2019 [AICO/2019/214]
- Spanish Ministry of Economy and Competitiveness [RTI2018-098237-B-C21]
- Generalitat Valenciana [Prometeo 2017-083]
The study found that UiO-66(Zr)-NH2 is an effective photocatalyst and hydrogenation catalyst for the reduction of 4-nitrophenol to 4-aminophenol. Through a tandem reaction, hydrogen is first generated from a water/methanol mixture and then used for the reduction of 4-nitrophenol.
This work reports the reduction of 4-nitrophenol to 4-aminophenol using UiO-66(Zr) as a bifunctional photocatalyst and hydrogenation catalyst using methanol as the hydrogen source. In particular, a series of UiO-66(Zr)-X (X: NH2, NO2 and H) and MIL-125(Ti)-NH2 catalysts have been screened as bifunctional catalysts for this process. UiO-66(Zr)-NH2 was found to be the most active material to promote light-assisted nitro hydrogenation under both UV-Vis and simulated sunlight irradiation. The tandem reaction occurs via hydrogen generation from a water/methanol mixture in the first step and, then, reduction of 4-nitrophenol to 4-aminophenol. UiO-66(Zr)-NH2 acts as a truly heterogeneous catalyst and can be reused several times without significant loss of activity, maintaining its crystallinity. This work shows the possibility of using MOFs as solar-driven bifunctional catalysts to promote the hydrogenation of organic compounds using methanol as the hydrogen source.
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