Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 13, Issue 24, Pages 6981-6998Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3cy01244a
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Bimetallic CuNi nanoparticles were successfully grown on the surface of a Ti-based metal-organic framework, NH2-MIL-125. The resulting structure, CuNi/NH2-MIL-125, showed narrower energy bandgap and enhanced photocatalytic activity due to the heterojunction between CuNi and NH2-MIL-125 that facilitated charge separation. This photocatalyst was demonstrated to be efficient for the synthesis of various organic compounds under light irradiation, and it exhibited good stability and recyclability.
Bimetallic CuNi nanoparticles were successfully grown on the surface of a Ti-based metal-organic framework, NH2-MIL-125, via impregnation and chemical reduction processes. The resulting structure, CuNi/NH2-MIL-125, was thoroughly characterized by various techniques, and its photoactivity was evaluated using diffuse reflectance spectroscopy and photoluminescence. The results revealed that CuNi/NH2-MIL-125 has a narrower energy bandgap than NH2-MIL-125 and the heterojunction between the two components (CuNi and NH2-MIL-125) facilitates the separation of the photogenerated charges by suppressing their recombination. The photocatalytic activity of CuNi/NH2-MIL-125 was studied for the one-pot synthesis of 1,4-dihydropyridines (yield = 85-96%, 30-105 min) without further aromatization to pyridines and photo rearrangement to 2,3-dihydropyrroles under light irradiation. For the first time, photo-driven synthesis of beta-acetamido ketones was developed in the presence of a photocatalyst with product yields of 81-93% within 2.5 h. The photocatalyst was chemically stable and photostable and also easily recyclable/reusable for at least four consecutive processes.
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