MnO_x/natural loofah composites were first prepared by a facile in‐situ reduction process under ambient conditions, in which natural loofah was impregnated in potassium permanganate solution for different time. MnO_x nanoparticles were loaded on both exterior and interior of the fibrous strands of loofah after impregnation from SEM observations. The crystal structure and chemical properties of MnO_x in the composites were confirmed to birnessite‐type MnO_x with the interplanar spacing of ~0.24 nm and Mn oxidation state of 3.6 by XRD, Raman, FTIR, TEM, and XPS. Such produced MO_x/loofah composites showed excellent performance for the catalytic oxidative decomposition and adsorption of formaldehyde at room temperature. The composites prepared with longer impregnation time exhibited better catalytic performance. The decomposition mechanism of HCHO over the MO_x/loofah composites involved adsorbed HCHO on the loofah was oxidized into intermediates first and further CO₂ by MnO_x through in‐situ DRIFTS analysis.

中文翻译：

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MnOx /天然丝瓜络复合材料的制备，表征和甲醛清除性能

MnO _x /天然丝瓜复合材料首先是在环境条件下通过简便的原位还原工艺制备的，其中天然丝瓜在高锰酸钾溶液中浸渍了不同的时间。在从SEM观察中浸渍之后，将MnO _x纳米粒子加载到丝瓜纤维束的外部和内部。XRD，拉曼，FTIR，TEM和XPS证实复合材料中MnO _x的晶体结构和化学性质为水钠锰矿型MnO _x，晶面间距约为0.24 nm，Mn氧化态为3.6。这样产生的MO _x丝瓜络复合材料在室温下对甲醛的催化氧化分解和吸附表现出优异的性能。用更长的浸渍时间制备的复合材料表现出更好的催化性能。丝瓜络上吸附的HCHO在MO _x /丝瓜络合物上的HCHO分解机理首先被氧化成中间体，然后通过原位DRIFTS分析被MnO _x氧化成CO ₂。