Abstract Indoor air pollution, including atmospheric particular matter 2.5 (PM2.5) and chemical gaseous pollutants (HCHO), has been an ongoing concern. Seeking a practical strategy for protection of the indoor air quality (IAQ) remains a challenge. Herein, we demonstrated a hierarchical porous membrane consisting of the birnessite-type MnO2 that was filled in the polystyrene porous nanofibers (MnO2/PS HPNM) fabricated by a versatile electrospinning method. The effective air cleaning of both PM2.5 and HCHO at remarkably low resistance was achieved by dominating the hierarchical porous structure. The HCHO gas could easily permeate through the mesopores of the PS nanofibers and contact MnO2, thereby resulting in an excellent HCHO removal efficiency of 88.2% after the initial run and 74% after five cycles. In addition, the pore-filling MnO2 with the layered structure increased the nanofiber membrane surface area, thus enhancing its PM capture performance (99.77%). Moreover, the macropores from the interwoven nanofibers ensured clean air penetration leading to a low airflow resistance of 82 Pa. The hierarchical multifunction porous structure membrane provided a new approach for the IAQ protection.

中文翻译：

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用于室温室内空气净化的二氧化锰分层多孔纳米纤维膜

摘要 室内空气污染，包括大气特定物质 2.5 (PM2.5) 和化学气态污染物 (HCHO)，一直受到关注。寻求保护室内空气质量 (IAQ) 的实用策略仍然是一个挑战。在此，我们展示了一种由水钠锰矿型 MnO2 组成的分层多孔膜，该膜填充在通过通用静电纺丝方法制造的聚苯乙烯多孔纳米纤维 (MnO2/PS HPNM) 中。PM2.5 和 HCHO 在非常低的阻力下有效净化空气是通过控制分层多孔结构实现的。HCHO 气体很容易渗透通过 PS 纳米纤维的中孔并与 MnO2 接触，从而在初始运行后产生 88.2% 的优异 HCHO 去除效率，在五个循环后达到 74%。此外，具有层状结构的孔填充 MnO2 增加了纳米纤维膜的表面积，从而提高了其 PM 捕获性能（99.77%）。此外，交织纳米纤维的大孔确保了清洁空气的渗透，导致 82 Pa 的低气流阻力。分级多功能多孔结构膜为室内空气质量保护提供了一种新方法。