Nanodispersed MnO/γ-AlO for NO Elimination at Room Temperature.

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ID: 11475
2019
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Abstract
Adsorption is an efficient method for atmospheric NOx abatement under ambient conditions; however, traditional adsorbents suffer from limited adsorption capacity and byproduct formation. Developing a low-cost material with high capacity for atmospheric NO elimination remains a challenge. Here, we synthesized a nanodispersed MnO/γ-AlO (Mn/Al) material that exhibits excellent ability to remove NO. The 10 wt% Mn/Al sample showed the highest removal capacity, with 247.6 mg NO/g Mn/Al, which is superior to that of activated carbon (42.6 mg NO/g). There were no byproducts produced when Mn/Al was tested with ppb-level NO. The NO abatement mechanism with Mn/Al is different from physisorption or chemisorption. NO removal is mainly a catalytic process in air, during which surface hydroxyls and lattice oxygen are involved in the oxidation of NO to nitrate. In contrast, a chemical reaction between Mn and NO is dominant in N, where Mn is converted into Mn and NO is reduced to nitrite. Washing with deionized water is an effective and convenient method for the regeneration of saturated Mn/Al, and an 86% adsorption capacity was recovered after one washing. The results suggest that this low-cost Mn/Al material with easy preparation and regeneration is a promising candidate material for atmospheric NO elimination.
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wang2019nanodispersedenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wang, Lian;Xu, Guangyan;Ma, Jinzhu;Yu, Yunbo;Ma, Qingxin;Liu, Kuo;Zhang, Changbin;He, Hong;
Journal Environmental science & technology
Year 2019
DOI
10.1021/acs.est.9b00941
URL
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