Particulate matter (PM) pollution as a kind of air pollution is a major problem for global environmental management because it can carry toxic compounds and lead to biological death when inhaled. There is, therefore, an urgent need to develop safe, efficient and economical materials to capture PM from contaminated air. Herein, we synthesized two kinds of conjugated microporous polymers (CMPs) block type aerogel based nanotube air filters by a one-step method and applied them in the purification of dusty air. By regulating the test conditions to investigate the applicability of these materials, CMPs-based air filters were successfully synthesized and can work continuously for 48 h under hazardous conditions (concentration of PM_2.5 > 1000 μg m⁻³). Filtration efficiencies are higher than 99.95% at ambient temperature and higher than 99.43% at a heating temperature of up to 500 °C. In addition to that, CMPs-based air filters can be regenerated several times and maintain a high efficiency level (PM_2.5 > 99.96%) after washing with methanol. What is noteworthy is that the two CMPs-based filters can take up 172.73 wt% and 153.90 wt% gaseous iodine and exhibit their potential as bifunctional filtration materials for capturing both PM and volatile substances.

中文翻译：

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用于高效捕获 PM 和气态碘的双功能共轭微孔聚合物过滤器

颗粒物（PM）污染作为一种空气污染是全球环境管理的主要问题，因为它可以携带有毒化合物并在吸入时导致生物死亡。因此，迫切需要开发安全、高效和经济的材料来从受污染的空气中捕获 PM。在此，我们通过一步法合成了两种基于共轭微孔聚合物（CMPs）块型气凝胶的纳米管空气过滤器，并将其应用于含尘空气的净化。通过调节试验条件考察这些材料的适用性，成功合成了基于CMPs的空气过滤器，可在危险条件下（PM _2.5 > 1000 μg m ^{-3浓度）连续工作48 h}）。在环境温度下过滤效率高于 99.95%，在加热温度高达 500°C 时高于 99.43%。除此之外，基于 CMP 的空气过滤器可以多次再生，并在用甲醇洗涤后保持高效率水平（PM _{2.5 > 99.96%）。}值得注意的是，这两种基于 CMPs 的过滤器可以吸收 172.73 wt% 和 153.90 wt% 的气态碘，并展示了它们作为捕获 PM 和挥发性物质的双功能过滤材料的潜力。