New insight into photochemical oxidation of Fe(II): The roles of Fe(III) and reactive oxygen species
文献类型：期刊论文
| 作者 | Wang, Zhaohui1,2; Liu, Jianshe1 |
| 刊名 | CATALYSIS TODAY
 |
| 出版日期 | 2014-04-01 |
| 卷号 | 224页码:244-250 |
| 关键词 | Environmental Photochemistry Kinetic Modeling Electron Spin Resonance Photosensitization |
| ISSN号 | 0920-5861 |
| DOI | 10.1016/j.cattod.2013.09.063 |
| 英文摘要 | Photooxidation of Fe(II) at acidic pH occurs in photocatalytic processes of Fe(III) species, but its reaction mechanism is not well understood. The kinetics of Fe(II) oxidation in irradiated aqueous solutions at pH 3.0 have been investigated in terms of kinetic modeling approach, rate constant estimation and the significance of various oxidation pathways. Fe(II) oxidation kinetics strongly rely on the availability of UV light, Fe(III) ions and oxygen. The presence of a portion of Fe(III) in Fe(II)-containing solutions favors the rapid oxidation of Fe(II). At high concentration of Fe(II), excitation of Fe(III) species may be quenched by Fe(II) in deaerated systems or may sensitize Fe(II) oxygenation under oxic conditions. By incorporation of this photosensitization pathway, the established model in this study is shown to be able to adequately describe the oxidation of Fe(II) at pH 3.0. Sensitivity analysis indicates that photolysis of Fe(III) species is critically important for overall Fe(II) oxidation kinetics. Fe(III)-catalyzed oxygenation of Fe(II), and oxidation of Fe(II) by HO2 center dot and center dot OH also exerts a marked impact on the oxidation of Fe(II). Therefore, Fe(III)-catalyzed oxygen activation and their secondary reactive oxygen species (ROS) account for the oxidation kinetics of Fe(II) at acidic pH. (C) 2013 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000331724200032 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50695]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Zhaohui |
| 作者单位 | 1.Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Zhaohui,Liu, Jianshe. New insight into photochemical oxidation of Fe(II): The roles of Fe(III) and reactive oxygen species[J]. CATALYSIS TODAY,2014,224:244-250. |
| APA | Wang, Zhaohui,&Liu, Jianshe.(2014).New insight into photochemical oxidation of Fe(II): The roles of Fe(III) and reactive oxygen species.CATALYSIS TODAY,224,244-250. |
| MLA | Wang, Zhaohui,et al."New insight into photochemical oxidation of Fe(II): The roles of Fe(III) and reactive oxygen species".CATALYSIS TODAY 224(2014):244-250. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。