期刊論文
| 學年 | 104 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2016-05-24 |
| 作品名稱 | Unraveling the Origin of Visible Light Capture by Core-Shell TiO2 Nanotubes |
| 作品名稱（其他語言） | |
| 著者 | Li, Jun; Liu, Chang-Hai; Li, Xia; Wang, Zhi-Qiang; Shao, Yu-Cheng; Wang, Sui-Dong; Sun, Xue-Liang; Pong, Way-Faung; Guo, Jing-Hua; Sham, Tsun-Kong |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Chemistry of Materials 28(12), p.4467-4475 |
| 摘要 | A black TiO2 nanotube (NT) heterostructure with an anatase-core and an amorphous-shell has been synthesized by NH3 annealing of amorphous NT grown by the anodization of a Ti substrate. Remarkable photoabsorption behavior of these black TiO2 NTs is observed: strong absorption throughout the entire optical wavelength region from ultraviolet to near-infrared. X-ray absorption near-edge structure (XANES), X-ray photoelectron spectroscopy (XPS) and resonant inelastic X-ray scattering (RIXS) have been used to elucidate the origin of this spectacular light capture phenomenon. Surface-sensitive XANES recorded in total electron yield and XPS show that the surface layer is amorphous with a chemical composition approaching that of Ti4O7. Bulk-sensitive XANES using X-ray partial fluorescence yield and Ti 2p RIXS confirm the presence of a rich amount of Ti3+ in the crystalline bulk (core of the NT with anatase structure) of black TiO2 NTs, which exhibits a dispersive d-d energy loss at ∼2 eV corresponding to the broad visible light absorption at ∼600 nm. Our results suggest that the extraordinary photoabsorption behavior of these black TiO2 NTs is due to the stabilization of Ti3+ in this special N-doped core–shell assembly having structure varying between TiO2 (bulk anatase) and Ti4O7 (surface, amorphous). |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | 1520-5002 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/108024 ) |