Photostability study of nanoporous TiO2 film electrodes in different pH solutions
文献类型：期刊论文
| 作者 | J. L. Cao ; Z. C. Wu ; H. Q. Zhang |
| 刊名 | Journal of Electroanalytical Chemistry
 |
| 出版日期 | 2006 |
| 卷号 | 595期号:1页码:71-77 |
| 关键词 | photostability nanoporous TiO2 film photoelectrochemistry titanium-dioxide photocatalytic hydrogenation environmental applications nanocrystalline tio2 aqueous suspensions solar-cells surface water degradation irradiation |
| ISSN号 | 0022-0728 |
| 中文摘要 | The nanoporous TiO2 film electrodes have been prepared by a sol-gel deposition process. The photostability of the electrodes at different pH values have been studied. The results show that the photostability of the electrodes decreases with increasing solution pH, especially in strong basic solutions without methanol. The increase of photocurrent and the decrease of onset potential with solution pH can be attributed to the increase of the adsorbed HO- ions. The adsorbed HO- ions act not only as electron donors but as also potential-determining ions on TiO2 film surface. However, in basic solutions the adsorbed O2- anions on TiO2 surface will form as pH value increases. The reaction of holes to the adsorbed O2- anions produces active O- anions. In the solutions without enough methanol the products of active O- anions oxidize Ti3+ to Ti4+ on TiO2 film surface and subsurface to occupy gradually the oxygen vacancies as electron donors. This results in the nanoporous TiO2, film electrodes being unstable with increasing pH. (c) 2006 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34134]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. L. Cao,Z. C. Wu,H. Q. Zhang. Photostability study of nanoporous TiO2 film electrodes in different pH solutions[J]. Journal of Electroanalytical Chemistry,2006,595(1):71-77. |
| APA | J. L. Cao,Z. C. Wu,&H. Q. Zhang.(2006).Photostability study of nanoporous TiO2 film electrodes in different pH solutions.Journal of Electroanalytical Chemistry,595(1),71-77. |
| MLA | J. L. Cao,et al."Photostability study of nanoporous TiO2 film electrodes in different pH solutions".Journal of Electroanalytical Chemistry 595.1(2006):71-77. |
入库方式： OAI收割
来源：金属研究所
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