【摘 要】
：
Efficient removal of pollutant formaldehyde (HCHO) at room temperature using transition-metal oxides remains a huge challenge to date.Manganese oxide can oxidize formaldehyde,however,how to control the valence states of manganese is the key to further imp
【机 构】
：
State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,Ch
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Efficient removal of pollutant formaldehyde (HCHO) at room temperature using transition-metal oxides remains a huge challenge to date.Manganese oxide can oxidize formaldehyde,however,how to control the valence states of manganese is the key to further improve the removal efficiency.We have success-fully prepared porous manganese oxide nanowires (MnOx NWs) with large surface area and multiple valence states of manganese using simple electrospinning followed by thermal calcination and potas-sium permanganate solution post-treatment (C/S process).The contents of trivalent and tetravalent man-ganese increased significantly after C/S process.Moreover,the composition of silver oxide coated silver nanowires (Ag@Ag2O NWs) is realized by assistance with oxygen plasma,which further enhanced high valence manganese.The formaldehyde removal efficiency by Ag@Ag2O-MnOx composite nanowires can reach 93.7％.The high-efficient catalytic activity is confirmed to attribute to the higher surface area of composite nanowires,the high-valence manganese and the silver oxide for oxidation of formaldehyde.
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