A flexible Pt/TiO₂/γ-Al₂O₃ nanfiber paper (PTA) was successfully prepared by an electrospinning-coating-NaBH₄ reduction method. The catalytic performance for formaldehyde (HCHO) oxidation over PTA with different Pt contents was investigated at room temperature. The results show that PTA exhibits higher catalytic activity and stability than Pt/γ-Al₂O₃. The TiO₂ coating can promote the transformation of intermediate species and the desorption of CO₂. The PTA1 with 1 wt% Pt shows the best catalytic activity and good stability. In the view of activity and cost, 0.5 wt% Pt is the optimal Pt content. The TiO₂ coating not only plays an important role in improving the activity and stability of PTA, but also acts as a protective shell of γ-Al₂O₃ fiber, which greatly reduces the risk of alkali etching during preparation and maintains the good flexibility of PTA. The dioxymethylene (DOM), formate/carbonate species, CO are the intermediate species in HCHO oxidation over PTA. In addition, PTA exhibits good filtration performance for fine particles as well as good fluid permeability. Because of the high efficiency and flexibility of PTA composite catalytic material for HCHO oxidation with good filtration performance for fine particles, it will be a promising candidate in air purification.

通过静电纺丝-涂层-NaBH ₄还原法成功制备了柔性Pt/TiO ₂ /γ-Al ₂ O ₃纳米纤维纸（PTA）。在室温下研究了不同 Pt 含量的 PTA 对甲醛 (HCHO) 氧化的催化性能。结果表明，PTA表现出比Pt/γ-Al ₂ O ₃更高的催化活性和稳定性。TiO ₂涂层可以促进中间物种的转化和CO ₂的解吸。含有 1 wt% Pt 的 PTA1 表现出最好的催化活性和良好的稳定性。从活性和成本的角度来看，0.5 wt% Pt 是最佳的 Pt 含量。钛白粉₂涂层不仅对提高PTA的活性和稳定性起着重要作用，而且作为γ-Al ₂ O ₃纤维的保护壳，大大降低了制备过程中碱蚀的风险，保持了PTA良好的柔韧性。二甲醛 (DOM)、甲酸盐/碳酸盐物质、CO 是 PTA 上 HCHO 氧化的中间物质。此外，PTA对细小颗粒表现出良好的过滤性能以及良好的流体渗透性。由于 PTA 复合催化材料用于 HCHO 氧化的高效性和柔韧性以及对细颗粒的良好过滤性能，它将成为空气净化的一个有前途的候选者。