Photocatalytic degradation of organic pollutants on surface anionized TiO2: Common effect of anions for high hole-availability by water
文献类型：期刊论文
| 作者 | Sheng, Hua; Li, Qin; Ma, Wanhong; Ji, Hongwei; Chen, Chuncheng; Zhao, Jincai |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2013-07-17 |
| 卷号 | 138页码:212-218 |
| 关键词 | Anion Tio2 Photocatalysis Charge Separation Hole-availability |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2013.03.001 |
| 英文摘要 | Effects of TiO2 surface anionization by inorganic anions such as phosphate, fluoride and sulfate on the photocatalytic degradation behaviors of a series of model pollutants are systematically investigated. The degradation rate, accumulation of hydrogen peroxide, formation of hydroxyl radicals and zeta potential are compared in the presence of different anions. Our experimental results show that specific-adsorbed anions have similar effect on all the tested photocatalytic parameters in all the systems, although the extent is anion-dependent. These observations indicate that the previously studied effect of surface fluorination is not special, and it is only an example of anionization effects. In combination with DFT calculation, we propose a common mechanism for anionization effect. According to this mechanism, the anion-derived surface negative charges are able to draw the photogenerated holes to TiO2 surface by electrostatic force. Thus, more holes are available at the interface, which accelerates remarkably the oxidation of surface-adsorbed solvent water to free (OH)-O-center dot radicals. (C) 2013 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000319087900025 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/53971]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Chuncheng |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sheng, Hua,Li, Qin,Ma, Wanhong,et al. Photocatalytic degradation of organic pollutants on surface anionized TiO2: Common effect of anions for high hole-availability by water[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2013,138:212-218. |
| APA | Sheng, Hua,Li, Qin,Ma, Wanhong,Ji, Hongwei,Chen, Chuncheng,&Zhao, Jincai.(2013).Photocatalytic degradation of organic pollutants on surface anionized TiO2: Common effect of anions for high hole-availability by water.APPLIED CATALYSIS B-ENVIRONMENTAL,138,212-218. |
| MLA | Sheng, Hua,et al."Photocatalytic degradation of organic pollutants on surface anionized TiO2: Common effect of anions for high hole-availability by water".APPLIED CATALYSIS B-ENVIRONMENTAL 138(2013):212-218. |
入库方式： OAI收割
来源：化学研究所
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