【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(spintrap,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(spinadduct,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.更多还原

【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.更多还原