Internal Electric Fields within the Photocatalysts
文献类型：期刊论文
| 作者 | Zhang Ling; Su Yang; Wang Wenzhong |
| 刊名 | PROGRESS IN CHEMISTRY
 |
| 出版日期 | 2016-04-01 |
| 卷号 | 28期号:4页码:415-427 |
| 关键词 | internal electric field photocatalysis separation of carriers band bending |
| 英文摘要 | Separation of photogenerated electron-hole pairs is a key step to enhance the photocatalytic activity of semiconductor photocatalysts. Internal electric filed, as a potential driving force to separation of the carriers, has become one of the research hotspots in photocatalytic field recently. In this paper, the literatures about the enhancement of photocatalytic performance based on the internal electric field are reviewed. To align their potentials (E-f), charge transfer occurs between two different component semiconductor materials. This charge redistribution region is known as the space charge region. After the charge transfer, the accumulation of electrons on the semiconductor surface leads to upward band bending. The internal electric field can be formed due to the redistribution of charges, which may in turn facilitate the separation of electrons and holes for reactions. The upward or downward bending can drive the holes/electrons to run up for an oxidation reaction/a reduction reaction, respectively. Internal electric fields within photocatalysts can arise from ferroelectric phenomena, p-n/polymorph junctions, polar surface terminations, and nonlinear optical material. The internal electric fields within photocatalysts mitigate the effects of recombination and back-reaction, then to increase photochemical reactivity. The strategies for manipulation of internal fields are also discussed for the design of efficient photocatalysts. Finally,we highlight some crucial issues in engineering internal electric fields and provide tentative suggestions for future research on increasing their photocatalytic performance. Especially, the importance of using advanced physical technology and theoretical calculation method to characterize the distribution of internal electric field is emphasized. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | POLAR OXIDE SURFACES ; VIBRATING PIEZOELECTRIC MICROFIBERS ; TITANIUM-DIOXIDE ; ANATASE TIO2 ; PHOTOCHEMICAL REDUCTION ; CARRIER SEPARATION ; SINGLE-CRYSTALS ; PHASE JUNCTION ; EFFECTIVE-MASS ; 101 FACETS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000375742000002 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/23103]  |
| 专题 | 上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文 |
| 作者单位 | Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Ling,Su Yang,Wang Wenzhong. Internal Electric Fields within the Photocatalysts[J]. PROGRESS IN CHEMISTRY,2016,28(4):415-427. |
| APA | Zhang Ling,Su Yang,&Wang Wenzhong.(2016).Internal Electric Fields within the Photocatalysts.PROGRESS IN CHEMISTRY,28(4),415-427. |
| MLA | Zhang Ling,et al."Internal Electric Fields within the Photocatalysts".PROGRESS IN CHEMISTRY 28.4(2016):415-427. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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