Considering the limitations of indoor ventilation owing to air pollution, CO₂ concentration rises rapidly to 3000 ppm, which is a level that can affect human health. It is essential to develop materials to reduce naturally occurring CO₂ in the buildings. Herein, a nano-encapsulated solvent (NES) via Pickering emulsion is proposed for indoor CO₂ capture. NaOH aqueous solution is wrapped with hydrophobic surface-functionalized SiO₂ (HS-SiO₂) nanoparticles, and the corrosiveness of NaOH is not caused by HS-SiO₂ wall. CO₂ capture capacity of NES-NaOH is evaluated as 7.57 mmol-CO₂/g-solvent which is the highest compared to other solvents including metal-organic frameworks (MOFs); it exhibits excellent structural stability in terms of temperature, time, moisture, and CO₂ reaction. NES-NaOH presents high selectivity toward CO₂ molecules due to the characteristics of NaOH with high gas permeability of macroporous silica wall and it is dispersed in a silicone oil harmless to human body. It is concluded that NES-NaOH can be successfully applied to air purifier filter to control the CO₂ concentration in buildings.

考虑到空气污染对室内通风的限制，CO ₂浓度迅速上升到3000 ppm，这是一个可以影响人体健康的水平。开发材料以减少建筑物中自然产生的 CO ₂是必不可少的。在此，提出了一种通过 Pickering 乳液的纳米封装溶剂 (NES) 用于室内 CO ₂捕获。NaOH水溶液被疏水表面功能化的SiO ₂ (HS-SiO ₂ )纳米颗粒包裹，NaOH的腐蚀性不是由HS-SiO ₂壁引起的。NES-NaOH 的CO ₂捕获能力评估为 7.57 mmol-CO ₂/g-溶剂，与包括金属有机骨架 (MOF) 在内的其他溶剂相比最高；它在温度、时间、水分和 CO ₂反应方面表现出优异的结构稳定性。NES-NaOH由于NaOH具有大孔二氧化硅壁的高透气性的特性，并且分散在对人体无害的硅油中，因此对CO ₂分子具有高选择性。结论是NES-NaOH可以成功地应用于空气净化器过滤器以控制建筑物中的CO ₂浓度。