Online Detection of Reactive Oxygen Species in Ultraviolet (UV)-Irradiated Nano-TiO2 Suspensions by Continuous Flow Chemiluminescence
文献类型：期刊论文
| 作者 | Wang, Dabin ; Zhao, Lixia ; Guo, Liang-Hong ; Zhang, Hui |
| 刊名 | ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2014 |
| 卷号 | 86期号:21页码:10535-10539 |
| ISSN号 | 0003-2700 |
| 中文摘要 | Reactive oxygen species (ROS) play very important roles in the photocatalytic reactions of semiconductors. Using a continuous flow chemiluminescence (CFCL) system, we developed three methods for the selective, sensitive, and online detection of O-2 (-), OH, and H2O2 generated during ultraviolet (UV) irradiation of nano-TiO2 suspensions. TiO2 nanoparticles were irradiated in a photoreactor and pumped continuously into a detection cell. To detect O-2 (-), luminol was mixed with TiO2 before it entered the detection cell. For the detection of short-lived OH, phthalhydrazide was added into the photoreactor to capture OH, and then mixed with H2O2/K5Cu(HIO6)(2) to produce chemiluminescence (CL). To detect H2O2, an irradiated TiO2 suspension was kept in darkness for 30 min, and then mixed with luminol/K3Fe(CN)(6) to produce CL. The selectivity of each method for a particular ROS was verified by using specific ROS scavengers. For a given ROS, a comparison between CL and conventional method showed good agreement for a series of TiO2 concentrations. The sensitivity of CL method was approximately 3-, 1200-, and 5-fold higher than the conventional method for O-2 (-), OH, and H2O2, respectively. To demonstrate the utility of the methods, ROS in three different types of TiO2 suspensions was detected by CFCL. It was found that photodegradation efficiency of Rhodamine B correlated the best (R-2 > 0.95) with the amount of photogenerated OH, implying that OH was the major oxidant in Rhodamine B photodegradation reaction. CFCL may provide a convenient tool for the studies on the reaction kinetics of ROS-participated decomposition of environmental contaminants. |
| WOS记录号 | WOS:000344510200008 |
| 公开日期 | 2015-03-24 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9414]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Dabin,Zhao, Lixia,Guo, Liang-Hong,et al. Online Detection of Reactive Oxygen Species in Ultraviolet (UV)-Irradiated Nano-TiO2 Suspensions by Continuous Flow Chemiluminescence[J]. ANALYTICAL CHEMISTRY,2014,86(21):10535-10539. |
| APA | Wang, Dabin,Zhao, Lixia,Guo, Liang-Hong,&Zhang, Hui.(2014).Online Detection of Reactive Oxygen Species in Ultraviolet (UV)-Irradiated Nano-TiO2 Suspensions by Continuous Flow Chemiluminescence.ANALYTICAL CHEMISTRY,86(21),10535-10539. |
| MLA | Wang, Dabin,et al."Online Detection of Reactive Oxygen Species in Ultraviolet (UV)-Irradiated Nano-TiO2 Suspensions by Continuous Flow Chemiluminescence".ANALYTICAL CHEMISTRY 86.21(2014):10535-10539. |
入库方式： OAI收割
来源：生态环境研究中心
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