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Copper‐Phosphine Supported Fe <sub/>3</sub> O <sub/>4</sub> @SiO <sub/>2</sub> as a Novel Reusable Nanocatalyst‐Catalyzed Tandem Reaction of Indole and Alcohols to Bis(indolyl)methanes under Blue LED Light
摘要： Nano Fe3O4@SiO2@TPP(cid:0) Cu as a novel heterogeneous nano-catalyst was prepared and authenticated by usual analytical and spectroscopic techniques. The prepared Fe3O4@SiO2@TPP(cid:0) Cu was applied to preparation of bis(indolyl) methane derivatives via a three-component reaction of aromatic alcohols with indoles under blue led lights. The advantages of this method are the selective oxidation of alcohols under mild conditions. The recycling studies revealed that catalyst could be easily recovered using an external magnet and reused for five times without significant loss of its catalytic activity.
关键词： Nano Fe3O4@SiO2@TPP(cid:0) Cu,Superparamagnetic nanocatalyst,Oxidation alcohols,Blue LED Light,Bis(indolyl)methanes
更新于2025-09-11 14:15:04
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Improvement of photocatalyst properties of magnetic NPs by new anionic surfactant
摘要： In this research, Fe3O4 NPs was synthesized by co- precipitation approach. Then SiO2 shell was grown on the Fe3O4 core. Synthesized NPs were characterized by means of XRD, FTIR, VSM, TGA, SEM and TEM. The magnetic properties of core and core-shell NPs was 74 and 42 emu/g, respectively. The TEM picture of core-shell was showed thickness shell of SiO2 on the Fe3O4 NPs. The size of this shell about 2.5nmWhich caused the core magnetic property to be well preserved. Photocatalyst activity of the synthesized NPs was investigated by using methyl orange (MO) and methylene blue (MB) as pollutant at different pH. For first time sodium citrate was used to improvement photo- degradation. The Fe3O4 indicated good photocatalyst activity for photo-degradation and it’s activity was considerably increased after SiO2 shell growth.
关键词： Fe3O4@SiO2,Photocatalyst,Tri sodium citrate,Fe3O4,Anionic surfactant
更新于2025-09-04 15:30:14