Heterogeneous Fenton oxidation of catechol and 4-chlorocatechol catalyzed by nano-Fe3O4: Role of the interface
文献类型：期刊论文
| 作者 | He, Jie
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2014 |
| 卷号 | 258期号:1页码:433-441 |
| 关键词 | Heterogeneous Fenton Nano-Fe3O4 Interface ATR-FTIR Eley-Rideal mechanism |
| ISSN号 | 1385-8947 |
| 中文摘要 | The nano-Fe3O4 catalyzed Fenton oxidations of catechol and 4-chlorocatechol in aqueous solution were comparably investigated to elucidate the interface reaction mechanism of the heterogeneous Fenton reactions. Nano-Fe3O4 were synthesized as quasi-spherical particles with specific surface areas of 57.84 m(2)/g. Almost all the catechol or 4-chlorocatechol was oxidized within 3 h after the addition Of H2O2, while about only 10% of the parent compounds adsorbed onto nano-Fe3O4 without H2O2. And the oxidation curves followed the pseudo-second order kinetic model. 4-Chlorocatechol was oxidized faster than catechol, but with only 40% of mineralization. The contribution of homogeneous reaction induced by the leaching iron was limited. The surface generated reactive oxygen species were (OH)-O-center dot and HO2 center dot/O-2(center dot), which were further reacted to generate oxygen-centered radicals in both systems, and carbon-centered radicals only in catechol system. In-situ flow-cell ATR-FTIR spectroscopy further confirmed that the adsorbed catechol or 4-chlorocatechol remained on the nano-Fe3O4 surface, indicating an Eley-Rideal mechanism. Meanwhile, the generated carboxyl acids and some intermediates like ethers or dimers were also adsorbed. Accordingly, schematic diagrams of oxidation mechanisms of catechol and 4-chlorocatechol in nano-Fe3O4/H2O2 system were proposed. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000343388700050 |
| 公开日期 | 2015-03-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9552]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | He, Jie. Heterogeneous Fenton oxidation of catechol and 4-chlorocatechol catalyzed by nano-Fe3O4: Role of the interface[J]. CHEMICAL ENGINEERING JOURNAL,2014,258(1):433-441. |
| APA | He, Jie.(2014).Heterogeneous Fenton oxidation of catechol and 4-chlorocatechol catalyzed by nano-Fe3O4: Role of the interface.CHEMICAL ENGINEERING JOURNAL,258(1),433-441. |
| MLA | He, Jie."Heterogeneous Fenton oxidation of catechol and 4-chlorocatechol catalyzed by nano-Fe3O4: Role of the interface".CHEMICAL ENGINEERING JOURNAL 258.1(2014):433-441. |
入库方式： OAI收割
来源：生态环境研究中心
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