modified by changing the ingredients or the ratio of core to the shell. In this research, a CoFe2O4@SiO2-guanidine nanocomposite was prepared and identified as an efficient catalyst for the one-pot synthesis of spirooxindole derivatives in water under ultrasonic irradiation conditions. The advantages of this method are in its simplicity, saving costs and energy, high yields, short reaction times, environmental
核/壳纳米粒子在
化学和
生物医学科学中具有广泛的应用。核-壳材料可以通过改变成分或核与壳的比例来改变和修饰。在这项研究中,制备了
CoFe2O4@SiO2-
胍纳米复合材料,并将其确定为在超声波辐照条件下在
水中一锅法合成螺氧
吲哚衍
生物的有效催化剂。该方法的优点是简单、节省成本和能源、产率高、反应时间短、环境友好、可重复使用以及使用外磁体易于回收催化剂。通过XRD、
SEM、
TEM、EDX、FT-IR、TGA和VSM技术对催化剂进行了表征。