| 학회 | 한국화학공학회 |
| 학술대회 | 2018년 봄 (04/25 ~ 04/27, 창원컨벤션센터) |
| 권호 | 24권 1호, p.497 |
| 발표분야 | 에너지 환경 |
| 제목 | Selective Formation of Disordered Layer in Single Titanium Dioxide Nanoparticle: Novel Metal-free Photocatalysis |
| 초록 | Despite longstanding controversy, TiO2 polymorphs heterojunction composed of anatase and rutile outperform the individual ones because of the energetic type-II band alignment at the heterojunction interface. However, localization of the disordered layer within conventional TiO2 nanoparticles with heterojunction has remained a big challenge. Here we report a selective positioning of a disordered layer with different thickness ranges in between the anatase and rutile phases by a conceptually different synthetic route for highly efficient novel metal-free photocatalytic H2 production. The multiple heterojunction in DE-P25 single nanoparticle with the disordered layer of 2~3 nm could be synthesized which is confirmed by high resolution-TEM, electron energy loss spectroscopy (EELS) and electron holography mapping for the first time. This multiple heterojunction in single TiO2 nanoparticles composed of crystalline anatase/disordered rutile/rutile demonstrate not only superior interfacial charge separation efficiency, but also novel-metal free surface reactivity, which synergistically yields ~140 times higher H2 production rate than conventional heterojunction system. |
| 저자 | 조윤준, 박종혁 |
| 소속 | 연세대 |
| 키워드 | 에너지 환경 |
| 원문파일 | 초록 보기 |
