A series of magnetic solid acid nano-catalysts were designed and prepared through a facile co-precipitate approach. The original nanocomposites ZrO2âAl2O3âFe3O4 were characterized by means of ICP-AES, BET, XRD, TEM, HRTEM, VSM, FT-IR, NH3-TPD and TG. Their catalytic behaviours were investigated via esterification, the synthesis of bis-indolylmethanes, Hantzsch reaction, Biginelli reaction and Pechmann reaction. In all of these organic reactions, the corresponding products were obtained in moderate to excellent yields. The optimal catalyst was ZAF-16/16, which retained catalytic activity after several recycles.
通过简便的共沉淀方法设计并制备了一系列磁性固体酸纳米催化剂。原始纳米复合材料ZrO2–
Al2O3–
Fe3O4通过ICP-AES、BET、XRD、
TEM、HR
TEM、VSM、FT-IR、NH3-
TPD和TG进行了表征。通过酯化反应、双
吲哚甲烷合成、Hantzsch反应、Biginelli反应和Pechmann反应研究了它们的催化行为。在所有这些有机反应中,获得了相应产品的中等至优良产率。最佳催化剂是ZAF-16/16,经过多次循环后仍保持催化活性。