The present work demonstrates an efficient continuous flow methodology for the preparation of iron oxide nanoparticles supported on porous silicates. The effect of the iron precursor solution feed rate, the synthesis temperature and time and the support type on the catalyst characteristics were studied, as well on the catalytic activity in the microwave-assisted oxidation of benzyl alcohol with hydrogen peroxide and in the alkylation of toluene with benzyl chloride and with benzyl alcohol. The method appeared to deposit more α-Fe₂O₃ (hematite) on the support surface compared to similar catalyst materials synthesized using other methods. The catalyst deactivation observed in consecutive reaction cycles was mostly due to the blocking of active sites rather than metal leaching from the catalyst framework.

中文翻译：

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多孔硅酸盐上负载型氧化铁纳米粒子的连续流合成及其催化应用的综合研究†

本工作证明了一种有效的连续流方法，用于制备负载在多孔硅酸盐上的氧化铁纳米颗粒。研究了铁前体溶液的进料速度，合成温度和时间以及载体类型对催化剂特性的影响，以及对微波过氧化氢苄醇的微波辅助氧化和甲苯烷基化的催化活性的影响。用苄基氯和苯甲醇。该方法似乎沉积更多的α-Fe ₂ ö ₃与使用其他方法合成的类似催化剂材料相比，载体表面上的（赤铁矿）含量更高。在连续的反应周期中观察到的催化剂失活主要是由于活性位点的阻塞，而不是由于金属从催化剂骨架中浸出。