Minireview and Perspective of One-Dimensional Manganese Oxide Nanostructures for the Removal of Air Pollutants

With the continuous expansion of the industrial productionscaleand the rapid development of urbanization, ecological damage andenvironmental pollution caused by air pollutants have become a non-negligibleproblem in human society. Catalytic technology is one of the mostpromising and environmentally friendly measures in the past few decadesto deal with airborne pollutants. The exploitation and research ofefficient and low-cost catalysts is the determining element for thedevelopment of the catalytic oxidation process. One-dimensional (1D)manganese oxide shows high activity, selectivity, and stability, whichgives credit to the excellent redox ability and surface acidy of MnO x . Additionally, the defect sites, acid-basecharacteristics, and valence state of the element are all modulatedby the 1D morphologies of these catalysts. As a result, they havebeen widely employed to reduce air pollution. In this paper, the fabricationprocess of manganese oxide nanowires, nanorods, and nanosheets isreviewed in detail. Second, we briefly summarize the application of1D manganese oxide nanostructures for the removal of nitrogen oxides,volatile organic compounds, carbon monoxide, ozone, and other pollutants.Finally, several approaches were proposed for the future researchdirections of one-dimensional manganese oxide nanostructures, hopingto narrow the gap between the novel manganese oxide-based catalystsand the actual demands and to realize commercialized application inthe nearest future.

Automated summary

With the expansion of industry and urbanization, the ecological damage and environmental pollution caused by air pollutants have become a significant problem. Catalytic technology is an effective and environmentally friendly approach to deal with airborne pollutants. One-dimensional manganese oxide nanostructures show high activity and stability, making them widely used in air pollution reduction. This article reviews the fabrication process of manganese oxide nanowires, nanorods, and nanosheets, summarizes their applications in removing various pollutants, and proposes future research directions to bridge the gap between novel catalysts and practical needs.