ZnO超微粒子光催化氧化降解n-C_7H_(16)的研究  

Investigation on Photocatalytic Oxidation Degradation of n-C_7H_(16) over ZnO Ultrafine Particles

作　　者：井立强[1] 孙晓君[1] 蔡伟民[1] 徐自力[2] 杜尧国[2] 王玲[3] 周秀清[3] 单洪岩[3] 

机构地区：[1]哈尔滨工业大学环境科学与工程系,哈尔滨150001 [2]吉林大学环境科学与工程系 [3]吉林大学分析测试实验中心,长春130023

出　　处：《高等学校化学学报》2002年第5期871-875,共5页Chemical Journal of Chinese Universities

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.

关 键 词：ZnO 超微粒子 光催化氧化 降解 n-C7H16 氧化锌 半导体光催化剂 有机污染物 庚烷 反应动力学 

分 类 号：X131[环境科学与工程—环境科学] O643.32[理学—物理化学]