Removal of indoor formaldehyde is important but challenging due to the very low concentration. Here, we showed the applicability of a new class of conjugated microporous poly(aniline)s (CMPAs) in this formaldehyde capture. The unique properties of rich ultramicroporosity and benzenoid amine (–NH–) groups made the resulting CMPAs ideal platforms for the efficient low-concentration formaldehyde adsorption, through the interaction between benzenoid amine groups and formaldehyde via Mannich reaction and H-bond in the ultramicropore. They therefore exhibited ultrafast adsorption, receiving > 80% removal efficiency for ca 0.7 ppm formaldehyde within 60 min, and benchmarking storage capacity, achieving ca. 2679.68 mg·g⁻¹ for CMPA-2. Our CMPAs also worked well in a self-assembled air clean unit, keeping kinetically reducing average 98% of formaldehyde after treatment of 4000 BV polluted air (with ca. 25 ppm formaldehyde) without break-through. Outcomes highlighted the potential of CMPAs for the clean-up of airborne formaldehyde for human health protection in next generation.

去除室内甲醛很重要，但由于浓度非常低，因此具有挑战性。在这里，我们展示了一类新的共轭微孔聚（苯胺）（CMPA）在这种甲醛捕获中的适用性。丰富的超微孔和苯胺（-NH-）基团的独特性质使所得的CMPA成为高效低浓度甲醛吸附的理想平台，通过苯胺基团与甲醛之间通过曼尼希反应和超微孔中的氢键相互作用。因此，它们表现出超快吸附，在 60 分钟内对约 0.7 ppm 甲醛的去除效率超过 80%，并以存储容量为基准，实现了约。2679.68 毫克·克⁻¹对于 CMPA-2。我们的 CMPA 在自组装的空气净化装置中也运行良好，在处理 4000 BV 污染空气（含有约 25 ppm 的甲醛）后，保持动态减少平均 98% 的甲醛而没有突破。结果突出了 CMPA 在清除空气中甲醛以保护下一代人类健康方面的潜力。