A microwave-assisted protocol to selectively produce benzaldehyde from neat styrene was developed by using ferrite magnetic nanoparticles, MFe₂O₄ [M = Mn²⁺, Fe²⁺, Co²⁺, Ni²⁺, Cu²⁺ or Zn²⁺] as catalysts. The CoFe₂O₄ nanoparticles revealed the best catalytic performance towards the selective production of benzaldehyde (93% selectivity at 86% styrene conversion) in 3 h at 80 °C using t-BuOOH as oxidant. The catalyst can be readily isolated by using an external magnet, and no significant loss of activity is observed when reused up to 5 consecutive runs. The low E-factor (mass ratio of waste to desired product) value (2.5) is indicative of the eco-friendly nature of the present catalytic system.

利用铁氧体磁性纳米粒子MFe ₂ O ₄ [M = Mn 2 ⁺，Fe 2 ⁺，Co 2 ⁺，Ni 2 ⁺，Cu ²⁺或Zn ²⁺ ]作为催化剂。CoFe ₂ O ₄纳米颗粒在80°C的条件下，在3 h下使用t-BuOOH作为氧化剂。通过使用外部磁体可以很容易地分离出催化剂，并且当重复使用多达5个连续运行时，没有观察到明显的活性损失。低的E因子（废物与所需产物的质量比）值（2.5）表明本催化体系的生态友好性质。