Catalytic activity of Ni nanotubes covered with nanostructured gold
Shumskaya A. Panina L. Rogachev A. Ihnatovich Z. Kozlovskiy A. Zdorovets M. Kaniukov E. Korolkov I.
December 2021Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2021#9Issue 12
Ni nanotubes (NTs) were produced by the template method in the pores of ion-track membranes and then were successfully functionalized with gold nanoparticles (Ni@Au NTs) using electroless wet-chemical deposition with the aim to demonstrate their high catalytic activity. The fab-ricated NTs were characterized using a variety of techniques in order to determine their morphology and dimensions, crystalline structure, and magnetic properties. The morphology of Au coating de-pended on the concentration of gold chloride aqueous solution used for Au deposition. The catalytic activity was evaluated by a model reaction of the reduction of 4-nitrophenol by borohydride ions in the presence of Ni and Ni@Au NTs. The reaction was monitored spectrophotometrically in real time by detecting the decrease in the absorption peaks. It was found that gold coating with needle-like structure formed at a higher Au-ions concentration had the strongest catalytic effect, while bare Ni NTs had little effect. The presence of a magnetic core allowed the extraction of the catalyst with the help of a magnetic field for reusable applications.
Au nanocatalysts1 , Magnetic nanotubes , Ni@Au nanocomposite , Template synthesis
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Institute of Chemistry of New Materials of the National Academy of Sciences of Belarus, Minsk, 220004, Belarus
National University of Science and Technology MISiS, Moscow, 101000, Russian Federation
Institute of Physics, Mathematics and Information Technology, Immanuel Kant Baltic Federal University, Kaliningrad, 236001, Russian Federation
Engineering Department, L.N. Gumilyov Eurasian National University, Astana, 010000, Kazakhstan
The Institute of Nuclear Physics, Almaty, 050000, Kazakhstan
Institute of New Materials and Technologies, Ural Federal University named after B.N.Yeltsin, Ekaterinburg, 620000, Russian Federation
Laboratory of Single Crystal Ggrowth, South Ural State University, Chelyabinsk, 454000, Russian Federation
Institute of Chemistry of New Materials of the National Academy of Sciences of Belarus
National University of Science and Technology MISiS
Institute of Physics
Engineering Department
The Institute of Nuclear Physics
Institute of New Materials and Technologies
Laboratory of Single Crystal Ggrowth
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