摘要
利用ZnO光催化氧化技术对气相n－C7H16 进行了降解研究，考察了氧气、水蒸气体积分数等因素对n－C7 H16光催化氧化的影响．利用气相色谱－质谱联用仪和气相色谱仪对气相光催化反应过程中的气体组成进行了定性分析，并对主要中间产物丙醛进行了定量分析，结果发现，ZnO超微粒子光催化氧化n－C7H16的降解率较高，n －C7H16绝大部分被完全氧化成CO2，探讨了n－C7H16光催化氧化反应的动力学行为及机理．
Abstract The degradation of gas-phase n-C7H16 by the technique of photocatalytic oxidation on ZnO wasinvestigated. It was found that under a certain condition of reaction, the photocatalytic oxidation degrada-tion rate of n-C7H16 on ZnO ultrafine particles (UFP) was higher. The influences of some factors such as O2volume fraction and H2O(g) volume fraction on photocatalytic oxidation of n-C7H16 were studied. The gascomposition during photocatalytic oxidation of n-C7H16 was qualitatively analyzed by using gas chromatog-raphy (GC ) and gas chromatogram-mass spectrum (GC-MS), and the principal intermediate product,propanal, was quantitatively analyzed, which could demonstrate that the most part of n-C7H16 degraded byphotocatalytic oxidation on ZnO was oxided to CO2. In addition, the kinetics and mechanism of photo-catalytic oxidation reaction of n-C7H16 were also probed into.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第5期871-875,共5页
Chemical Journal of Chinese Universities
