During this paper, palladium nanoparticles were immobilized on the surface of Fe₃O₄ using Hibiscus tiliaceus L. extract as a stabilizing and reducing agent. The green synthesized Pd/Fe₃O₄ nanocomposite was characterized by FT-IR, UV–Vis, TEM, XRD, VSM, FESEM and EDS. The prepared Pd/Fe₃O₄ nanocomposite was used an efficient catalyst for the reduction of Cr(VI), 4-nitrophenol (4-NP) and 2,4-dinitrophenylhydrazine (2,4-DNPH). The catalytic activities of the Pd/Fe₃O₄ nanocomposite in reactions were monitored by using UV–Vis spectroscopy. It can be recovered and reused six times without remarkable loss of its catalytic activity.

在本文中，使用芙蓉提取物作为稳定剂和还原剂将钯纳米颗粒固定在Fe ₃ O ₄的表面上。通过FT-IR，UV-Vis，TEM，XRD，VSM，FESEM和EDS对绿色合成的Pd / Fe ₃ O ₄纳米复合材料进行了表征。制备的Pd / Fe ₃ O ₄纳米复合材料可用于还原Cr（VI），4-硝基苯酚（4-NP）和2,4-二硝基苯肼（2,4-DNPH）。Pd / Fe ₃ O ₄的催化活性反应中的纳米复合物通过使用UV-Vis光谱仪进行监测。它可以回收并重复使用六次，而不会显着降低其催化活性。