Abstract A new nanoreactor type structure composed of hollow mesoporous silica spheres and CuO nanoparticles loaded inside the interior cavity of spheres has been designed and successfully prepared. The synthesis method is proceed in a four step procedure by using carbon spheres as the hard template together with a coating of tetraethyl orthosilicate (TEOS) and cetyltrimethyl ammonium bromide (CTAB) mixture. The obtained nanoreactors were characterized with FE-SEM, elemental mapping, TEM, XRD, BET, ICP and TPR analysis. The CO2 fixation reaction is applied to evaluate the catalytic performance of the synthesized CuO@SiO2 multi-yolk@shell catalyst. This catalyst exhibits superior activity in CO2 fixation reactions with 96% yield in 4 h at low pressure. The catalyst demonstrates superb mechanical stability, high activity and is recovered for at least six times without loss of activity in CO2 fixation reaction, showing that this type of nanoreactor could be applied as a promising material in advanced catalysis applications.

中文翻译：

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CuO@SiO2 multi-yolk@shell的设计与合成及其作为无溶剂条件下CO2固定反应新催化剂的应用

摘要 设计并成功制备了一种由中空介孔二氧化硅球体和负载在球体内部空腔内的CuO纳米颗粒组成的新型纳米反应器型结构。通过使用碳球作为硬模板以及正硅酸四乙酯 (TEOS) 和十六烷基三甲基溴化铵 (CTAB) 混合物的涂层，合成方法分四步进行。用FE-SEM、元素分布图、TEM、XRD、BET、ICP和TPR分析对获得的纳米反应器进行表征。应用 CO2 固定反应来评估合成的 CuO@SiO2 多蛋黄@shell 催化剂的催化性能。该催化剂在 CO2 固定反应中表现出优异的活性，在低压下 4 小时内产率为 96%。该催化剂表现出极好的机械稳定性，