| 陈猛,上官文峰.钴锰复合金属氧化物同时去除室内甲醛和低浓度臭氧[J].分子催化,2015,(6):545-552 |
| 钴锰复合金属氧化物同时去除室内甲醛和低浓度臭氧 |
| Simultaneous removal of ozone and formaldehyde in indoor air by cobalt-manganese oxide catalysts |
| 投稿时间：2015-11-01 修订日期：2015-11-30 |
| DOI： |
| 中文关键词: 甲醛 臭氧 催化 钴锰复合金属氧化物 |
| 英文关键词:formaldehyde ozone catalysis cobalt-manganese composite oxides |
| 基金项目:国家高技术研究发展计划（863计划）;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 采用原位浸渍法将钴锰复合金属氧化物Co-MnOx负载于堇青石蜂窝陶瓷上，考察了不同制备条件下，该催化剂在室内环境下同时去除甲醛和低浓度臭氧的性能。结果显示，钴锰摩尔比为1：1，煅烧温度为773 K时，制备的样品催化活性最高，并且其甲醛去除率受环境湿度的影响不明显。XRD、BET、TEM、EDS、XPS、ICP等表征手段表明，这种较高的催化活性可能来自于形成的钙钛矿CoMnO3晶相结构以及Co、Mn在催化剂中表现出的混合价态。论文同时利用原位红外技术对反应机理进行了探讨，结果表明：甲酸是甲醛臭氧催化氧化反应的主要中间产物。 |
| 英文摘要: |
| Cobalt-manganese composite catalysts (Co-MnOx) were synthesized and supported on cordierite honeycomb ceramics by in-situ impregnation method in this work. With UV lights as ozone source, the catalysts prepared by different cobalt manganese molar ratio and calcination temperature were applied to simultaneously remove low-concentration ozone and formaldehyde in an indoor environment. The results showed that, with the synthesis condition of 1:1 cobalt manganese molar ratio and 773 K calcination temperature, the catalyst acquired the highest activity to remove formaldehyde. According to the catalysts characterization such as XRD, BET, TEM, EDS、XPS and ICP, the excellent catalytic activity is ascribed to the formation of perovskite CoMnO3, larger amount of surface oxygen and mixed-valency of metal ions. In addition, the effect of the ambient humidity were also discussed. The in-situ FTIR technology was applied to investigate the reaction mechanism of Co-MnOx catalytic reaction for simultaneous removal of formaldehyde and ozone. It has been found that, formic acid is the main intermediate in formaldehyde oxidation. |
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