Plant mediated biogenic synthesizednanoparticles have beenquite familiar as next generation prospective catalysts. In this work, we have demonstrated copper nanoparticles (Cu NP) immobilized magnetic Fe₃O₄ nanoparticles using Calendula extract as a reducing and stabilizing agent. The plant extract phytochemicals initially are adorned as a protective shell over the core ferrite NPs and further reduces the incoming Cu ions following a green pathway.The physicochemical characterizations of the nanocomposite was carried out through Fourier transformed infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), vibrating sample magnetometer (VSM), inductively coupled plasma-optical emission spectroscopy (ICP-OES) and X-ray diffraction (XRD) study.The as synthesized material was used as a competent and magnetically isolable catalyst in the controlled and selective oxidation of different organic sulfides to sulfoxides using hydrogen peroxide as the green oxidant at room temperature. A wide spectrum of aromatic, aliphatic and heterocyclic sulfides were oxidized to their corresponding sulfoxides with excellent yields without any over oxidized product to sulfones.Due to superparamagentic character, the materialwas easily magnetically decantable and reused for 8 consecutive times with retention of its catalytic activity.

植物介导的生物合成纳米颗粒作为下一代预期催化剂已经非常熟悉。在这项工作中，我们已经使用金盏花证明了铜纳米颗粒 (Cu NP) 固定的磁性 Fe ₃ O ₄纳米颗粒提取物作为还原剂和稳定剂。植物提取物的植物化学物质最初装饰在核心铁氧体 NPs 上作为保护壳，并通过绿色途径进一步减少进入的 Cu 离子。纳米复合材料的物理化学表征是通过傅里叶变换红外光谱 (FT-IR)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、能量色散 X 射线光谱 (EDX)、振动样品磁强计 (VSM)、电感耦合等离子体光发射光谱 (ICP-OES) 和 X 射线衍射 (XRD) 研究. 所合成的材料在室温下使用过氧化氢作为绿色氧化剂在不同有机硫化物受控和选择性氧化为亚砜中用作有效且磁分离的催化剂。