Femtosecond laser deposition of TiO2 nanoparticle-assembled films with embedded CdS nanoparticles

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2014,（1）
• 页码范围: 43-46
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-014-3196-6

摘要

Based on the normal pulsed laser ablation method,femtosecond pulsed laser deposition (fs-PLD) is adopted in vacuum for the production of TiO2 nanoparticle-assembled films.We study the morphology and electronic characteristics of TiO2 nanoparticle-assembled films deposited at different oxygen background gas pressures from high vacuum (～104 Pa) to 100 Pa and different deposition time.Our results show that TiO2 nanoparticle-assembled films obtained in high vacuum present both a mixture with rutile phase and anatase phase and a pure rutile phase.At the same time,there are more mesoporous structures in the film after annealing,which is beneficial for the enhancement of photocatalytic activity.In water splitting experiment,part of the TiO2 nanoparticle-assembled films embedded with a small mass fraction of CdS nanoparticles (～5％) present an interesting photocurrent enhancement with a maximum value of ～0.2 mA/cm2 under a solar simulator.