We synthesized mesoporous silica nanospheres (MSNs) with small particle size (under 100 nm) and large surface areas (>800 m²/g) by modified Stöber method. We investigated coating of oxygen adsorber materials (iron-based and titania-based) by atomic layer deposition on the prepared MSNs. We found that MSNs without any coating are capable of adsorbing oxygen by physisorption, and that due to their high surface areas they can outperform commercial oxygen scavengers for atmospheres with moderate and low humidity levels. Their performance is further enhanced for optimized thickness of FeO_x or TiO_x coating, where chemisorption contributes to oxygen scavenging process. To further investigate the oxygen adsorption on MSNs, samples with different annealing times were prepared and characterized, and the oxygen adsorption could be attributed to incomplete removal of silicon precursor residue. While the samples with prolonged annealing time do not exhibit oxygen adsorption, the high oxygen adsorption capacity can be restored by glucose treatment which results in carbon-based surface coating of MSNs. Due to their fast response and high oxygen adsorption capacity, the prepared materials are highly promising as oxygen scavengers, in particular for applications in dry environments where humidity activation is undesirable.

我们通过改进的 Stöber 方法合成了具有小粒径（低于 100 nm）和大表面积（>800 m ² /g）的介孔二氧化硅纳米球 (MSN) 。我们通过原子层沉积在制备的 MSN 上研究了氧吸附剂材料（铁基和二氧化钛基）的涂层。我们发现没有任何涂层的 MSN 能够通过物理吸附来吸附氧气，并且由于它们的高表面积，它们可以在中等和低湿度的大气中胜过商业除氧剂。它们的性能进一步增强，以优化 FeO _x或 TiO _{x 的}厚度涂层，其中化学吸附有助于除氧过程。为了进一步研究 MSN 上的氧吸附，制备并表征了不同退火时间的样品，氧吸附可归因于硅前驱体残留物的不完全去除。虽然延长退火时间的样品不会表现出氧吸附，但葡萄糖处理可以恢复高氧吸附能力，从而导致 MSN 的碳基表面涂层。由于它们的快速响应和高氧吸附能力，所制备的材料作为氧清除剂非常有前途，特别是在不希望湿气活化的干燥环境中的应用。