Sheng Kefa, Xia Hongyu, Ge Jianping
AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, China.
AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, China.
J Colloid Interface Sci. 2024 Dec 15;676:763-773. doi: 10.1016/j.jcis.2024.07.156. Epub 2024 Jul 20.
Selective hydrogenation of nitroaromatics is a crucial industrial reaction, but there are still challenges in developing nanocatalysts with stable active centers, yet easily recyclable characteristics. Here, a magnetically separable Pd/FeO@SiO nanocatalyst was prepared through the seeding growth of silica on the FeO nanocrystal cluster (NC) followed by in situ reduction of Pd nanoparticles (NPs) on the amino group modified FeO@SiO nannotube (NT). The nanocatalyst showed good activity and stability in the hydrogenation of a series of nitroaromatics as the Pd NPs were highly dispersed on the nanotubes. Meanwhile, it could be easily separated from the reaction solution and well-redispersed in the solvent for the next-round reaction due to the superparamagnetic property of the FeO NC and the good dispersibility of silica in many organic solvents. The magnetically separable nanocatalyst combined the high activity of the nanocatalyst and the convenient separation of a traditional heterogeneous catalyst, which effectively promote the practical application of nanomaterials in catalysis.
硝基芳烃的选择性加氢是一种关键的工业反应，但在开发具有稳定活性中心且易于回收利用特性的纳米催化剂方面仍存在挑战。在此，通过在FeO纳米晶簇（NC）上进行二氧化硅的种子生长，随后在氨基修饰的FeO@SiO纳米管（NT）上原位还原钯纳米颗粒（NPs），制备了一种可磁分离的Pd/FeO@SiO纳米催化剂。由于钯纳米颗粒高度分散在纳米管上，该纳米催化剂在一系列硝基芳烃的加氢反应中表现出良好的活性和稳定性。同时，由于FeO NC的超顺磁性以及二氧化硅在许多有机溶剂中的良好分散性，它可以很容易地从反应溶液中分离出来，并能很好地重新分散在溶剂中用于下一轮反应。这种可磁分离的纳米催化剂结合了纳米催化剂的高活性和传统多相催化剂的便捷分离性，有效地促进了纳米材料在催化领域的实际应用。
