碳基催化剂表面含氧官能团对NO催化还原反应的影响研究

碳基催化剂表面含氧官能团对NO催化还原反应的影响研

究

李晓曼

【期刊名称】《上海环境科学》

【年(卷),期】2018(037)003

【摘要】以富含表面含氧官能团的氧化石墨烯(GO)作为研究对象,考察GO及GO负载铁催化剂(Fe@GO)在NO-SCR中的主要结构单元及其在不同反应温度下的作用机理,发现在100℃反应条件下,对NO分解起主要作用的是羧酸基团,GO对NO的去除效率大于Fe@GO;而300℃反应条件下,GO表面大量羧酸基团受热分解,无法起到去除NO的作用,而Fe@GO中酸酐基团和C-Fe-O基团在较高的反应温度下开始发挥作用,使催化效率显著增加,故Fe@GO对NO 的去除效率大于GO.%Graphene oxide (GO) with abundant surface oxygen functional groups was used to show the main structural unit in NO-SCR involving GO and GO supported iron catalyst (Fe@GO) . The research showed that the removal rate of nitrogen monoxide (NO) by GO was greater than by Fe@GO at temper ature of 100°C, but it turned to be lower at 300°C. This was owing to the fact that carboxylic acid groups on GO resulted in a higher catalytic effect at 100°C whilst were decomposed by heating at 300°C. At higher reaction temperature, NO removal was attributed to anhydride groups and the unique structure of C-Fe-O on Fe@GO so as to cause the catalytic effect higher than GO.【总页数】5页(111-115)