| 학회 |
한국공업화학회 |
| 학술대회 |
2018년 봄 (05/02 ~ 05/04, 대구 엑스코(EXCO)) |
| 권호 |
22권 1호 |
| 발표분야 |
(국제협력위원회) Future Energy and Environmental Technology |
| 제목 |
Photoelectrochemical Water Splitting from Disordered Metal Oxide Semiconductors |
| 초록 |
Here we report the selective positioning of a disordered layer of controlled thicknesses between the anatase and rutile phases by a conceptually different synthetic route to access highly efficient novel metal-free photocatalysis for H2 production. The presence of multiple heterojunctions in a single TiO2 nanoparticle containing the disordered layer with a thickness of several nanometers was confirmed for the first time by high-resolution transmission electron microscopy (TEM) with electron energy-loss spectroscopy (EELS) and inline electron holography. Multiple heterojunctions in single TiO2 nanoparticles composed of crystalline anatase/disordered rutile/ordered rutile layers give the nanoparticles superior electron/hole separation efficiency and novel metal-free surface reactivity, which concomitantly yields an H2 production rate that is ~140 times higher than that of conventional anatase and rutile single heterojunction TiO2 systems. |
| 저자 |
박종혁 |
| 소속 |
연세대 |
| 키워드 |
광전기화학; 태양광; 물분해
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| E-Mail |
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