Renewable biomass-based activated carbon fiber paper (ACFP) possesses a three-dimensional network porous structure for high-efficient toxic gas purification. However, intelligently building high catalytic activity biomass-based carbon materials with superior flexibility remains a significant challenge. Herein, a series of paper-based catalysts (MnO/ACFP) with varying MnO loadings were fabricated by combining MnO-loaded ACF and softwood (Pinales) fiber via a wet-papermaking process. The precursor derives from abundant and green biomass, meanwhile, the channels of plant fiber facilitate gas flow and the effective dispersion of active sites. Noteworthy, the introduction of softwood fiber imparts flexibility to the catalyst, enabling it to be folded, wound, and bent without compromising mechanical strength, thus exhibiting excellent processability. Formaldehyde (HCHO) removal in a static system was applied to evaluate their reactivities. Among all, MnO/ACFP-1.7 (12.22 wt% Mn) shows 100 % removal of HCHO in 1 h with a turnover frequency value of 0.01526 min, being more than 10 times that of the bulk MnO particles. The underlying mechanism for the enhanced catalytic performance can be ascribed to the synergistic effect of its stronger gas capture ability together with more exposed active sites. This work provides insight into the design of a flexible and environmentally friendly catalyst for the degradation of organic contaminants.

中文翻译：

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用于降解 HCHO 的柔性、可回收和绿色纤维纸复合材料


可再生生物质基活性炭纤维纸（ACFP）具有三维网络多孔结构，可高效净化有毒气体。然而，智能构建具有卓越灵活性的高催化活性生物质基碳材料仍然是一个重大挑战。在此，通过湿法造纸工艺将 MnO 负载的 ACF 和软木 (Pinales) 纤维相结合，制备了一系列具有不同 MnO 负载量的纸基催化剂 (MnO/ACFP)。该前驱体来源于丰富、绿色的生物质，同时植物纤维的通道有利于气体流动和活性位点的有效分散。值得注意的是，软木纤维的引入赋予了催化剂柔韧性，使其能够在不影响机械强度的情况下折叠、缠绕和弯曲，从而表现出优异的加工性能。应用静态系统中的甲醛 (HCHO) 去除来评估其反应性。其中，MnO/ACFP-1.7（12.22wt%Mn）在1h内100%去除HCHO，周转频率值为0.01526min，是块状MnO颗粒的10倍以上。增强催化性能的潜在机制可归因于其更强的气体捕获能力与更多暴露的活性位点的协同效应。这项工作为设计用于降解有机污染物的灵活且环保的催化剂提供了见解。