標題: | Strongly Enhancing Photocatalytic Activity of TiO2 Thin Films by Multi-Heterojunction Technique |
作者: | Cheng, Hsyi-En Hung, Chi-Hsiu Yu, Ing-Song Yang, Zu-Po 光電系統研究所 Institute of Photonic System |
關鍵字: | multijunction;titanium dioxide;thin film;photocatalysis;functional coatings |
公開日期: | 1-十月-2018 |
摘要: | The photocatalysts of immobilized TiO(2 )film suffer from high carrier recombination loss when compared to its powder form. Although the TiO2 with rutile-anatase mixed phases has higher carrier separation efficiency than those with pure anatase or rutile phase, the single junction of anatase/rutile cannot avoid the recombination of separated carriers at the interface. In this study, we propose a TiO2/SnO2/Ni multi-heterojunction structure which incorporates both Schottky contact and staggered band alignment to reduce the carrier recombination loss. The low carrier recombination rate of TiO2 film in TiO2/SnO2/Ni multi-heterojunction structure was verified by its low photoluminescence intensity. The faster degradation of methylene blue for TiO2 /SnO2/Ni multi-junctions than for the other fabricated structures, which means that the TiO2 films grown on the SnO2/Ni/Ti coated glass have a much higher photocatalytic activity than those grown on the blank glass, SnO2-coated and Ni/Ti-coated glasses, demonstrated its higher performance of photogenerated carrier separation. |
URI: | http://dx.doi.org/10.3390/catal8100440 http://hdl.handle.net/11536/148374 |
ISSN: | 2073-4344 |
DOI: | 10.3390/catal8100440 |
期刊: | CATALYSTS |
Volume: | 8 |
顯示於類別: | 期刊論文 |