Department of New Materials, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, P.O. Box 76315-117, Kerman, Iran.
Ultrason Sonochem. 2013 Nov;20(6):1436-41. doi: 10.1016/j.ultsonch.2013.04.008. Epub 2013 Apr 28.
The nano eggshell powder (NESP) has been prepared by ultrasound irradiation and used as a novel and biodegradable catalyst with high catalytic activity and reusability in green synthesis of 2-aminochromenes via condensation of α- or β-phathol, malononitrile and aromatic aldehydes at 120 °C under solvent-free conditions. The reaction proceeds to completion within 10-35 min in 91-98% yield. Nano eggshell catalyst was characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and X-ray fluorescence, thermal gravimetric, surface area and elemental analyses. In addition, the catalytic activity and chemical structure of nano-sized eggshell were compared with pure CaCO3.
纳米蛋壳粉（NESP）通过超声辐射制备，并用作新型可生物降解催化剂，在无溶剂条件下，于 120°C 下通过α-或β-苯乙酮、丙二腈和芳香醛缩合反应，在绿色合成 2-氨基查尔酮中表现出高催化活性和可重复使用性。反应在 10-35 分钟内完成，产率为 91-98%。纳米蛋壳催化剂通过扫描电子显微镜、X 射线粉末衍射、IR 光谱和 X 射线荧光、热重分析、表面积和元素分析进行了表征。此外，还比较了纳米蛋壳的催化活性和化学结构与纯 CaCO3 的差异。
