| 甲醛在光催化降解反应中自由基中间体的电子顺磁共振研究 |
| |
| 引用本文： | 陈扬,齐奉明,杨超,叶为春,王春明. 甲醛在光催化降解反应中自由基中间体的电子顺磁共振研究[J]. 化学学报, 2009, 67(7): 671-674 |
| |
| 作者姓名： | 陈扬 齐奉明 杨超 叶为春 王春明 |
| |
| 作者单位： | 兰州大学化学化工学院,兰州,730000;兰州大学化学化工学院,兰州,730000;兰州大学化学化工学院,兰州,730000;兰州大学化学化工学院,兰州,730000;兰州大学化学化工学院,兰州,730000 |
| |
| 摘 要： | 以纳米二氧化钛(TiO2)光催化降解甲醛, 使用2-甲基-2-亚硝基丙烷(2-methyl-2-nitroso-propane, MNP)作为自旋捕截剂(spin trap, ST), 研究了反应过程中的自由基中间体, 得到了一种新的自旋加合物(spin adduct, ST-R). 电子顺磁共振(Electron Paramagnetic Resonance, EPR)的结果表明, 甲醛在水溶液中降解的反应中间体为•CH(OH)2, 并提出了一种新的降解机理.
|
| 关 键 词： | 纳米二氧化钛(TiO2) 甲醛 光催化降解 电子顺磁共振(EPR) |
| 收稿时间： | 2008-08-02 |
| 修稿时间： | 2008-12-18 |
Investigation of Free Radical Intermediates of Formaldehyde Photocatalytic Degradation by Electron Paramagnetic Resonance |
| |
| Chen Yang,Qi Fengming,Yang Chao,Ye Weichun,Wang Chunming. Investigation of Free Radical Intermediates of Formaldehyde Photocatalytic Degradation by Electron Paramagnetic Resonance[J]. Acta Chimica Sinica, 2009, 67(7): 671-674 |
| |
| Authors: | Chen Yang Qi Fengming Yang Chao Ye Weichun Wang Chunming |
| |
| Affiliation: | (Department of Chemistry, Lanzhou University, Lanzhou 730000) |
| |
| Abstract: | Formaldehyde was degraded with photo-catalysis by nano-titanium dioxide (TiO2) and 2-methyl- 2-nitro-propane (MNP) was used as a spin trap (ST). The radical intermediates in the process of reaction were studied and a new spin adduct (ST-R) was obtained. The results of electron paramagnetic resonance (EPR) indicated that the intermediate of formaldehyde degradation in aqueous solution was •CH(OH)2. A new degradation mechanism was proposed. |
| |
| Keywords: | nano-TiO2 formaldehyde photocatalysis degradation electron paramagnetic resonance (EPR) |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《化学学报》浏览原始摘要信息 |
|
点击此处可从《化学学报》下载全文 |
|
