Silver nanoparticles supported over mesoporous alumina as an efficient nanocatalyst for N-alkylation of hetero (aromatic) amines and aromatic amines using alcohols as alkylating agent

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• 作者：Priyanka Paul^a ; Piyali Bhanja^b ; Noor Salam^d ; ¹ ; Usha Mandi^c ; ¹ ; Asim Bhaumik^b ; ^{msab@iacs.res.in} ; Seikh Mafiz Alam^a ; ^{mafizchem@gmail.com} ; Sk. Manirul Islam^c ; ^{manir65@rediffmail.com}
• 关键词：Mesoporous material ; Alumina ; Silver nanoparticles ; N-alkylation reaction ; Hetero (aromatic) amines
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 May 2017
• 年：2017
• 卷：493
• 期：Complete
• 页码：206-217
• 全文大小：5899 K
• 卷排序：493

文摘

We have successfully embedded rhombohedral crystallites of silver nanoparticles (Ag-NPs) over mesoporous alumina (Ag@Al2O3) material for the first time. The Ag@Al2O3 has been characterized by powder X-ray diffraction (PXRD), ultra high resolution transmission electron microscopy (UHR-TEM), scanning electron microscopy (SEM), N2 adsorption/desorption isotherm, Fourier transform infrared spectroscopy (FT-IR), ultraviolet–visible absorption spectra (UV–Vis), and thermogravimetric analysis (TGA). The PXRD confirms the presence of the rhombohedral phase of Ag nanoparticles. The agglomeration of the silver nanoparticle having a dimension of 80–90 nm has been clearly observed from UHR-TEM images. This novel nanocatalyst showed excellent catalytic activity towards the N-alkylation of hetero (aromatic) amines and aromatic amines using alcohols as the alkylating agent. The catalyst is heterogeneous in nature and can be recovered and recycled more than five reaction cycles without any noticeable loss in its catalytic activity.