Mn/GO复合催化剂催化氧化NO

Catalytic oxidation of NO by Mn/GO catalysts

针对尾气中NO浓度高且传统方法脱除NO代价高的问题,研究了锰固载氧化石墨诱导单过硫酸氢钾(PMS)催化氧化并吸收NO方法。通过浸渍法在氧化石墨上负载了Mn3O4制得Mn/GO催化剂,以此为催化剂催化PMS氧化NO。研究了p H、PMS投加量、催化剂投加量以及温度等因素对NO氧化率的影响。结果表明,该系列Mn/GO催化剂可以有效地诱导PMS氧化NO,热处理时间为7 h时催化效果最佳。同时,对Mn/GO(7 h)的FT-IR、XRD、SEM、EDS以及XPS表征可知,Mn3O4是主要的锰氧化物,并成功负载在GO表面。

Nowdays the NO concentration in exhaust is high,and the traditional methods for removing NO cost much,we used Mn / GO / PMS to degradate NO. Following the heat treatment of Mn( NO3)2·4H2O with different treatment times,the series Mn / GO catalysts were prepared by impregnation method with graphite oxide( GO) as carrier. In the existance of Mn /GO catalyst,the redox reaction of KHSO5( PMS) and NO was catalyzed effectively. Effects of different parametes such as p H,PMS amount,Mn / GO amount and temperature on the oxidation rate of NO were investigated. The result showed that the catalytic performance is the best corresponding to the Mn / GO catalyst with 7 h treatment. Meanwhile,the Mn / GO( 7 h) was characterized by FT-IR,XRD,SEM,EDS and XPS. It was found that the manganese oxide was uniformly dispersed on the surface of GO with Mn3O4 as the major form.