Synthesis of Acetamide Derivatives using S-MWCNT and S-MC as an Efficient Heterogeneous Catalysts
作者:K. U Minchitha、H. N Hareesh、N Nagaraju、N Kathyayini
DOI:10.1166/jnn.2018.14563
日期:2018.1.1
carbon (S-MC) catalysts were prepared by wet impregnation method. These materials were characterized by different analytical techniques such as Powder-XRD, BET surface area analysis, SEM-EDS and TEM analysis to evaluate their bulk and surface properties. Surface acidity of the catalyst was measured by TPD-NH3 technique, as well as n-butyl amine titration. The estimated surface acidity of S-MWCNT and
采用湿法浸渍法制备了硫酸盐改性的多壁碳纳米管(S-MWCNT)和中孔碳(S-MC)催化剂。这些材料通过不同的分析技术进行了表征,例如粉末XRD,BET表面积分析,SEM-EDS和TEM分析,以评估其体积和表面性能。通过TPD-NH3技术以及正丁胺滴定法测量催化剂的表面酸度。发现使用正丁胺滴定法测得的S-MWCNT和S-MC的表面酸度分别为0.82和1.75 mmol / g。在液相反应中,使用芳族酸与取代的芳族胺合成乙酰胺衍生物时,对这些材料的催化活性进行了研究。优化反应条件以获得良好的产物%收率。通常,S-MC催化剂表现出良好的催化活性,并且比S-MWCNT具有更高的%乙酰胺产率。这归因于S-MC的较高的表面酸度,但是发现该催化剂不可回收。S-MWCNT表现出中等的产率百分比和对产物形成的100%的选择性。将S-MWCNT催化剂循环使用最多5次,相应乙酰胺衍生物的收率保持一致。通过MP,