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High catalytic activity for formaldehyde oxidation of an interconnected network structure composed of δ -MnO 2 nanosheets and γ -MnOOH nanowires
Advances in Manufacturing ( IF 4.2 ) Pub Date : 2020-08-28 , DOI: 10.1007/s40436-020-00321-2
Ying Tao , Rong Li , Ai-Bin Huang , Yi-Ning Ma , Shi-Dong Ji , Ping Jin , Hong-Jie Luo

Among the transition metal oxide catalysts, manganese oxides have great potential for formaldehyde (HCHO) oxidation at ambient temperature because of their high activity, nontoxicity, low cost, and polybasic morphologies. In this work, a MnO2-based catalyst (M-MnO2) with an interconnected network structure was successfully synthesized by a one-step hydrothermal method. The M-MnO2 catalyst was composed of the main catalytic agent, δ-MnO2 nanosheets, dispersed in a nonactive framework material of γ-MnOOH nanowires. The catalytic activity of M-MnO2 for HCHO oxidation at room temperature was much higher than that of the pure δ-MnO2 nanosheets. This is attributed to the special interconnected network structure. The special interconnected network structure has high dispersion and specific surface area, which can provide more surface active oxygen species and higher surface hydroxyl groups to realize rapid decomposition of HCHO.



中文翻译:

由δ-MnO 2纳米片和γ-MnOOH纳米线组成的互连网络结构对甲醛氧化的高催化活性

在过渡金属氧化物催化剂中,锰氧化物因其高活性,无毒,低成本和多元形态而在环境温度下具有很大的甲醛(HCHO)氧化潜力。在这项工作中,通过一步水热法成功地合成了具有互连网络结构的MnO 2基催化剂(M-MnO 2)。所述M-的MnO 2催化剂组成的主催化剂的,δ -MnO 2个纳米片,分散在非激活框架材料γ -MnOOH纳米线。室温下,M-MnO 2对HCHO氧化的催化活性远高于纯δ- MnO。2纳米片。这归因于特殊的互连网络结构。特殊的互连网络结构具有高分散性和比表面积,可以提供更多的表面活性氧种类和更高的表面羟基,从而实现HCHO的快速分解。

更新日期:2020-08-28
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