Essential explanation of the strong mineralization performance of boron-doped diamond electrodes
文献类型：期刊论文
| 作者 | Zhu, Xiuping1; Tong, Meiping1; Shi, Shaoyuan2; Zhao, Huazhang1; Ni, Jinren1 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2008-07-01 |
| 卷号 | 42期号:13页码:4914-4920 |
| 关键词 | waste-water treatment p-substituted phenols electrochemical oxidation organic pollutants anodic-oxidation aqueous-solution degradation 4-chlorophenol incineration 2-naphthol |
| ISSN号 | 0013-936X |
| 其他题名 | Environ. Sci. Technol. |
| 中文摘要 | Electrochemical oxidation of p-nitrophenol was examined using different anodic materials, including Ti/boron-doped diamond (BDD), Ti/SnO2-Sb/PbO2, and Ti/SnO2-Sb anodes. The results demonstrated that Ti/BDD anodes had a much stronger mineralization performance than the other two anodes. Furthermore, it was found that hydroxyl radicals could mainly exist as free hydroxyl radicals at BDD anodes, which could react with organic compounds effectively. This implied that the dominant mechanism for a much higher mineralization capacity of BDD anodes would be attributed to the existence of free hydroxyl radicals in the BDD anode cell rather than adsorbed hydroxyl radicals on the BDD anode. To further corroborate this hypothesis, electrochemical oxidation of p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) was examined at the Ti/BDD, Ti/SnO2-Sb/ PbO2, and Ti/SnO2-Sb anodes, respectively. The study revealed that for Ti/BDD electrodes,the degradation rate of p-substituted phenols (k) increased with the increase of Hammett's constant (sigma), which confirmed the dominance of free hydroxyl radicals at BDD anodes and its effective reaction with organics therein. For Ti/SnO2-Sb/PbO2 electrodes, the degradation rate of p-substituted phenols (k) increased with the increase of initial surface concentration Gamma (representing the adsorption capacity of phenols to electrode surface), which indicated that organic compounds mainly reacted with adsorbed hydroxyl radicals at PbO2 anodes. For Ti/SnO2-Sb electrodes, however, k increased with the increase of the integrated parameter S (representing the effects of both sigma and Gamma), which implied that organic compounds reacted with both adsorbed hydroxyl radicals and free hydroxyl radicals at SnO2 anodes. |
| 英文摘要 | Electrochemical oxidation of p-nitrophenol was examined using different anodic materials, including Ti/boron-doped diamond (BDD), Ti/SnO2-Sb/PbO2, and Ti/SnO2-Sb anodes. The results demonstrated that Ti/BDD anodes had a much stronger mineralization performance than the other two anodes. Furthermore, it was found that hydroxyl radicals could mainly exist as free hydroxyl radicals at BDD anodes, which could react with organic compounds effectively. This implied that the dominant mechanism for a much higher mineralization capacity of BDD anodes would be attributed to the existence of free hydroxyl radicals in the BDD anode cell rather than adsorbed hydroxyl radicals on the BDD anode. To further corroborate this hypothesis, electrochemical oxidation of p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) was examined at the Ti/BDD, Ti/SnO2-Sb/ PbO2, and Ti/SnO2-Sb anodes, respectively. The study revealed that for Ti/BDD electrodes,the degradation rate of p-substituted phenols (k) increased with the increase of Hammett's constant (sigma), which confirmed the dominance of free hydroxyl radicals at BDD anodes and its effective reaction with organics therein. For Ti/SnO2-Sb/PbO2 electrodes, the degradation rate of p-substituted phenols (k) increased with the increase of initial surface concentration Gamma (representing the adsorption capacity of phenols to electrode surface), which indicated that organic compounds mainly reacted with adsorbed hydroxyl radicals at PbO2 anodes. For Ti/SnO2-Sb electrodes, however, k increased with the increase of the integrated parameter S (representing the effects of both sigma and Gamma), which implied that organic compounds reacted with both adsorbed hydroxyl radicals and free hydroxyl radicals at SnO2 anodes. |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology |
| 关键词[WOS] | WASTE-WATER TREATMENT ; P-SUBSTITUTED PHENOLS ; ELECTROCHEMICAL OXIDATION ; ORGANIC POLLUTANTS ; ANODIC-OXIDATION ; AQUEOUS-SOLUTION ; DEGRADATION ; 4-CHLOROPHENOL ; INCINERATION ; 2-NAPHTHOL |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000257220600052 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2937]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Peking Univ, Dept Environm Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Xiuping,Tong, Meiping,Shi, Shaoyuan,et al. Essential explanation of the strong mineralization performance of boron-doped diamond electrodes[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2008,42(13):4914-4920. |
| APA | Zhu, Xiuping,Tong, Meiping,Shi, Shaoyuan,Zhao, Huazhang,&Ni, Jinren.(2008).Essential explanation of the strong mineralization performance of boron-doped diamond electrodes.ENVIRONMENTAL SCIENCE & TECHNOLOGY,42(13),4914-4920. |
| MLA | Zhu, Xiuping,et al."Essential explanation of the strong mineralization performance of boron-doped diamond electrodes".ENVIRONMENTAL SCIENCE & TECHNOLOGY 42.13(2008):4914-4920. |
入库方式： OAI收割
来源：过程工程研究所
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