thermogravimetric analyses and transmission electron microscopy. Reduction of nitroarenes to the corresponding arylamines and one-pot reductive-acetylation of nitroarenes to acetanilides were carried out successfully by nanoparticles of the immobilized Cu–Ni–Fe–Cr layered double hydroxide on silica-coated Fe3O4 in water as a green solvent. All reactions were carried out within 6–22 min affording arylamines and
摘要在共沉淀条件下制备了可磁回收的Fe 3 O 4 @SiO 2 @ Cu–Ni–Fe–Cr LDH。使用傅里叶变换红外光谱,扫描电子显微镜,能量色散X射线光谱,X射线衍射,振动样品磁力计,Brunauer-Emmett-Teller,热重,差示热重分析和透射电子显微镜证实了介孔催化剂的特征。 。通过在
二氧化硅包覆的Fe 3 O 4上固定化的Cu-Ni-Fe-Cr层状双氢氧化物的纳米粒子,成功地完成了硝基
芳烃的还原反应,生成了相应的芳基胺,并将
一氧化氮芳烃一锅还原乙酰化。在
水中作为绿色溶剂。所有反应均在6至22分钟内进行,以高至优异的产率得到芳基胺和N-芳基乙酰胺。核壳纳米催化剂的可重复使用性进行了六次检查,而其催化活性没有明显损失。 图形概要