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首页> 外文期刊>Nanotechnology >A facile route to transfer Cu nanoparticles to organic medium for better stabilization and improved photocatalytic activity towards N-formylation reaction
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A facile route to transfer Cu nanoparticles to organic medium for better stabilization and improved photocatalytic activity towards N-formylation reaction

机译：将Cu纳米颗粒转移到有机培养基中的容易途径，以更好地稳定和改善光催化活性朝向N-甲酰亚胺反应

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摘要

Cu nanoparticles were prepared in an aqueous phase by means of a simple reduction-route using sodium borohydride as the reducing agent in the presence of ascorbic acid and polyvinylpyrrolidone (PVP). The hydrosol of the Cu nanoparticles deteriorated within a day. It compelled to initiate a scheme to stabilize the nanoparticles for a long period of time. Phase transfer to organic solvents using Benzyldimethylstearylammonium chloride (BDSAC) as a phase transfer agent was found to be an effective path in this respect. BDSAC performed the dual role of dragging the Cu nanoparticles from water to organic solvent and also acted as a capping agent along with PVP for better stabilization of Cu nanoparticles. The organosol of the Cu nanoparticles exhibited excellent stability and promising catalytic activity towards N-formylation reactions on a number of amine substrates in presence of visible green LED light. The yield and reusability of the catalyst were promising. All the samples were thoroughly characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, energy dispersive analysis of x-rays, x-ray photoelectron spectroscopy and thermo gravimetric analysis.
机译：通过使用硼氢化钠作为还原剂在抗坏血酸和聚乙烯吡咯烷酮（PVP）存在下，在水相中在水相中制备Cu纳米颗粒。 Cu纳米颗粒的水溶酚在一天内劣化。迫使引发一种方案以长时间稳定纳米颗粒。发现使用苯并二甲基丙基氯化铵（BDSAC）作为相转移剂的有机溶剂的相转移是这方面的有效路径。 BDSAC在将Cu纳米颗粒从水中拖动到有机溶剂的双重作用，并且还用作封端剂以及PVP，以更好地稳定Cu纳米颗粒。 Cu纳米颗粒的有机溶胶在存在可见的绿色LED光的存在下朝向胺基化反应的优异稳定性和有前途的催化活性。催化剂的产量和可重用性是有前途的。通过UV可见光光谱，傅里叶变换红外光谱，透射电子显微镜，X射线，X射线光电子能谱和热重分析的透射电子显微镜，能量分散分析。

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