图 书 馆
通过电子阱的能量分辨密度鉴定金属氧化物粉末的新概念A Novel Concept of Identification of Metal-oxide Powders by Energy-resolved Density of Electron Traps |
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| 课程网址: | http://videolectures.net/preglov_ohtani_metal_oxide_powders/ |
| 主讲教师: | Bunsho Ohtani |
| 开课单位: | 北海道大学 |
| 开课时间: | 2017-08-22 |
| 课程语种: | 英语 |
| 中文简介: |  通过新开发的反向双束光声光谱法（RDB）评估了金属氧化物粒子中电子陷阱的能级分解分布以及金属氧化物粒子中的导带底部（CBB）与价带（VB）顶部能量的函数关系PAS），其中通过使用625 nm调制的LED光，通过光声光谱法（PAS）测量通过强连续光照射直接从VB激发的ET中电子的光吸收。在这项研究中，如何使用ERDT / CBB模式作为指纹来鉴定具有带隙和ET的金属氧化物颗粒（二氧化钛，氧化铌和其他），加权重合度乘以ERDT模式的重合度，得出讨论了ETs和CBB的密度，以及ERDT / CBB图案的重合程度与光催化活性之间的关系。 |
| 课程简介: | Energy-resolved distribution of electron traps (ERDT) as well as conduction-band bottom (CBB) in metal oxide particles as a function of energy from valence-band (VB) top has been evaluated by newly developed reversed double-beam photoacoustic spectroscopy (RDB-PAS), in which photoabsorption of electrons in ETs directly excited from VB by irradiation of intense continuous light is measured by photoacoustic spectroscopy (PAS) using modulated LED light at 625 nm. In this study, how to use ERDT/CBB patterns as a finger print for identification of metal oxide (titania, niobia and the others) particles having band gap and ETs by weighted degree of coincidence multiplied by the degrees of coincidence of ERDT patterns, total density of ETs and CBB, and correlation between degree of coincidences of ERDT/CBB patterns and photocatalytic activities are discussed. |
| 关 键 词: | 反向双束光声光谱法; 电子陷阱; 金属氧化物 |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2020-12-14：cjy |
| 最后编审: | 2020-12-14：cjy |
| 阅读次数: | 65 |