An Environment-Friendly Method to Catalytically Oxidate NO in Waste Water by Supported Manganese Oxide on Graphite Oxide

Abstract:

In order to generate powerful radicals as oxidizing species for the complete oxidation of NO, homogeneous activation of peroxymonosulfate (Oxone: PMS) by the Mn₃O₄/GO catalysts was explored. The catalytic oxidation of NO from waste gas was investigated using advanced oxidation process based on sulfate radicals that produced. The manganese oxide immobilized on graphene oxide (GO) can activate PMS for the oxidation of NO in water. We not only took advantage of the high oxidation–reduction potential of produced sulfite radicals but also an opportunity to oxidize NO on less complex compounds with low dosages. The Mn₃O₄/GO catalysis system was characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that Mn₃O₄ was well-distributed on GO. The Mn₃O₄/GO catalyst system exhibited high efficiency for NO oxidation when the Mn₃O₄/GO catalyst has an optimum Mn₃O₄ loading. In addition, the best catalytic oxidation can be achieved within 30 min with pH 4 and 6 mM PMS at 25 °C. Therefore, the results indicate promising potential for a system utilizing Mn₃O₄/PMS to oxidize NO for offgas treatment.

• Periodical: Applied Mechanics and Materials (Volume 768)
• Pages: 3-9
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.768.3
• Online since: June 2015
• Authors: Rui Jing Su*, Min Cong Zhu, Xiu Zhi Sun, Jie Guan
• Keywords: Graphite Oxide, Manganese Oxide, NO, Peroxymonosulfate

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